TY  - JOUR
A1  - Wolf, Markus
A1  - Klug, Jörg
A1  - Hackenberg, Reinhard
A1  - Gessler, Manfred
A1  - Grzeschik, Karl-Heinz
A1  - Beato, Miguel
A1  - Suske, Guntram
T1  - Human CC10, the homologue of rabbit uteroglobin: genomic cloning, chromosomal localization and expression in endometrial cell lines
N2  - No abstract available
KW  - Biochemie
Y1  - 1992
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-59206
ER  - 
TY  - JOUR
A1  - Werner, S.
A1  - Sebald, Werner
T1  - Immunological techniques for studies on the biogenesis of mitochondrial membrane proteins
N2  - no abstract available
KW  - Biochemie
Y1  - 1981
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-82044
ER  - 
TY  - JOUR
A1  - Weiss, H.
A1  - Sebald, Walter
A1  - Schwab, A. J.
A1  - Kleinow, W.
A1  - Lorenz, B.
T1  - Contribution of mitochondrial and cytoplasmic protein synthesis to the formation of cytochrome b and cytochrome aa\(_3\)
N2  - A cytochrome b preparation from Neurospora crassa mitochondria is found to consist of three polypeptides (apparent molecular weight 10 000, 11 000 and 32 000), a cytochrome aa3 preparation of six to seven polypeptides (apparent molecular weight 8 000, 11 000, 13 000, 18 000, 28 000 and 36 000). Selective incorporation of radioactive amino acids by eilher mitochondrial protein synthesis when the cytoplasmic one is blocked or by the cytoplasmic protein synthesis, when the mitochondrial one is blocked, indicates that one cytochrome b polypeptide (mw 32 000) and one to three cytochrome aa3 polypeptides (mw 36 000, 28 000 and 18 000) are mitochondrial translation products, the other cytochrome b and cytochrome aa3 polypeptides cytoplasmic translation products. The delayed appearance of labeling in the cytochrome b and cytochrome aa3 polypeptides compared to the average cell protein after a pulse of <~H leueine revealed that these polypeptides are derived from separate pools of precursor polypeptides. The pool sizes range from 2 p. cent to 25 p. cent of the amount of the corresponding polypeptide present in the cytochromes. The 32 000 molecular weight polypeptide of cytochrome band at least the 18 000 molecular weight polypeptide of cytochrome aa\(_3\) are mitochondrial translation products as well in the fungus Neurospora crassa as in the insect Locusta migratoria. So, despite the fact that the size of mitochondrial DNA and mitochondrial ribosomes is reduced in insects, the products have maintained their characteristics.
KW  - Biochemie
Y1  - 1973
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62835
ER  - 
TY  - JOUR
A1  - Weiss, H.
A1  - Sebald, Walter
A1  - Bücher, T.
T1  - Cycloheximide resistant incorporation of amino acids into a polypeptide of the cytochrome oxidase of Neurospora crassa
N2  - Radioaetive leueine was ineorporated by N eurospora crassa mitoehondria in vivo in the presence of cyeloheximide. When the membrane protein of these mitochondria was ehromatographieally separated on oleyl polymethaerylie aeid resin, & nurober of fraetions were obtained whieh differ with respeet to their eontents of radioaetivity and eytoehromes. The highest speeifie radioaetivity was found in the fraction eontaining eytoehrome aa3• This fraetion proved to be a pure and enzymatically aetive cytoehrome oxidase. Its ratio of absorbanee at 280 nm (ox)/ 443 nm (red.) was 2.1. By means of sodium dodeeylsulfate gel-electrophoresis, this enzymewas separated into five polypeptides with molecular weights of 30000, 20000, 13000, 10000, and 8000. Only the polypeptide with the molecular weight 20000 displayed a high specific radioaetivity.
KW  - Biochemie
Y1  - 1971
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62866
ER  - 
TY  - JOUR
A1  - Weiss, H.
A1  - Sebald, Walter
T1  - Purification of cytochrome oxidase from Neurospora crassa and other sources
N2  - A chromatographic procedure 1 is described by means of which cytochrome oxidase has been purified from a variety of organisms including the fungus N eurospora crassa,2,3 the unicellular alga Po/ytoma mirum, 4 the insect Locusta migratoria ,5 the frog Xenopus muel/eri,4 and the mammal Rattus norwegicus. 4 This procedure can be used to equal effect for large-scale preparations, starting from grams of mitochondrial protein, or for small-scale preparations starting from milligrams. The cytochrome oxidase preparations from the different organisms are enzymically active. They show similar subunit compositions.
KW  - Biochemie
Y1  - 1978
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-82082
ER  - 
TY  - JOUR
A1  - Weigel, U.
A1  - Meyer, M.
A1  - Sebald, Walter
T1  - Mutant proteins of human interleukin 2. Renaturation yield, proliferative activity and receptor binding
N2  - No abstract available
KW  - Biochemie
Y1  - 1989
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62543
ER  - 
TY  - JOUR
A1  - Weich, H. A.
A1  - Sebald, Walter
A1  - Schairer, H. U.
A1  - Hoppe, J.
T1  - The human osteosarcoma cell line U-2 OS expresses a 3.8 kilobase mRNA which codes for the sequence of the PDGF-B chain
N2  - A cDNA clone of about 2500 basepairswas prepared from the human osteosarcoma cellline U-2 OS by hybridizing with a v-sis probe. Sequence analysis showed that this cDNA contains the coding region for the PDGF-B chain. Here we report that the mitogen secreted by these osteosarcoma cells contains the PDGF-B chain and is probably a homodimer of two B-chains.
KW  - Biochemie
KW  - Platelet-derived growthfactor
KW  - cDNA
KW  - Oncogene
KW  - Tumor cell
Y1  - 1986
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62588
ER  - 
TY  - JOUR
A1  - Vortkamp, A.
A1  - Thias, U.
A1  - Gessler, Manfred
A1  - Rosenkranz, W.
A1  - Kroisel, P. M.
A1  - Tommerup, N.
A1  - Kruger, G.
A1  - Gotz, J.
A1  - Pelz, L.
A1  - Grzeschik, Karl-Heinz
T1  - A somatic cell hybrid panel and DNA probes for physical mapping of human chromosome 7p
N2  - No abstract available
KW  - Biochemie
Y1  - 1991
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-59217
ER  - 
TY  - JOUR
A1  - von Jagow, Gerhard
A1  - Sebald, Walter
T1  - b-Type cytochromes
N2  - No abstract available
KW  - Biochemie
Y1  - 1980
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-47383
ER  - 
TY  - JOUR
A1  - Viebrock, A.
A1  - Perz, A.
A1  - Sebald, Walter
T1  - The imported preprotein of the proteolipid subunit of the mitochondrial ATP synthase from Neurospora crassa. Molecular cloning and sequencing of the mRNA
N2  - No abstract available
KW  - Biochemie
Y1  - 1982
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62742
ER  - 
TY  - JOUR
A1  - Velours, J.
A1  - Esparza, M.
A1  - Hoppe, J.
A1  - Sebald, Walter
A1  - Guerin, B.
T1  - Amino acid sequence of a new mitochondrially synthesized proteolipid of the ATP synthase of Saccharomyces cerevisiae
N2  - The purification and the amino acid sequence of a proteolipid translated on ribosomes in yeast mitochondria is reported. This protein, which is a subunit of the A TP synthase, was purified by extraction with chloroform/methanol (2/1) and subsequent chromatography on phosphocellulose and reverse phase h.p.l.c. A mol. wt. of 5500 was estimated by chromatography on Bio-Gel P-30 in 8011/o fonnie acid. The complete amino acid sequence of this protein was determined by automated solid phase Edman degradation of the whole protein and of fragments obtained after cleavage with cyanogen bromide. The sequence analysis indicates a length of 48 amino acid residues. The calculated mol. wt. of 5870 corresponds to the value found by gel chromatography. This polypeptide contains three basic residues and no negatively charged side chain. The three basic residues are clustered at the C terminus. The primary structure of this protein is in full agreement with the predicted amino acid sequence of the putative polypeptide encoded by the mitochondrial aap1 gene recently discovered in Saccharomyces cerevisiae. Moreover, this protein shows 5011/o homology with the amino acid sequence of a putative polypeptide encoded by an unidentified reading frame also discovered near the mitochondrial ATPase subunit 6 genein Aspergillus nidulans.
KW  - Biochemie
KW  - ATP synthase
KW  - mitochondrially translated
KW  - proteolipid
KW  - sequence subunit
Y1  - 1984
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62695
ER  - 
TY  - JOUR
A1  - van Heyningen, V.
A1  - Bickmore, W. A.
A1  - Seawright, A.
A1  - Fletcher, J. M.
A1  - Maule, J.
A1  - Fekete, G.
A1  - Gessler, Manfred
A1  - Bruns, G. A.
A1  - Huerre-Jeanpierre, C.
A1  - Junien, C.
T1  - Role for the Wilms tumor gene in genital development?
N2  - No abstract available
KW  - Biochemie
Y1  - 1990
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-59238
ER  - 
TY  - JOUR
A1  - Tzagoloff, A.
A1  - Macino, G.
A1  - Sebald, Walter
T1  - Mitochondrial genes and translation products
N2  - No abstract available
KW  - Biochemie
Y1  - 1979
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-47408
ER  - 
TY  - JOUR
A1  - Tony, H. P.
A1  - Shen, B. J.
A1  - Reusch, P.
A1  - Sebald, Walter
T1  - Design of human interleukin-4 antagonists inhibiting interleukin-4-dependent and interleukin-13-dependent responses in T-cells and B-cells with high efficiency
N2  - Human interleukin-4 possesses two distinct sites for receptor activation. A signaHing site, comprising residues near the C-terminus on helix D, determines the efficacy of interleukin-4 signal transduction without affecting the binding to the interleukin-4 receptor a subunit. A complete antagonist and a series of low-efficacy agonist variants of human interleukin-4 could be generated by introducing combinations of two or three negatively charged aspartic acid residues in this site at positions 121, 124, and 125. One of the double variants, designated [R121D,Y124D]interleukin-4, with replacements of böth Arg121 and Tyr124 by aspartic acid residues was completely inactive in all analysed cellular responses. The loss of efficacy in [R121D,Y124D]interleukin-4 is estimated to be larger than 2000-fold. Variant [R121D,Y124D]interleukin-4 was also a perfect antagonist for inhibition of interleukin-13-dependent responses in B-cells and the TF-1 cellline with a K\(_i\) value of approximately 100 pM. In addition, inhibition of both interleukin-4-induced and interleuk.in-13- induced responses could be obtained by monoclonal antibody X2/45 raised against interleukin-4Rm the extracellular domain of the interleuk.in-4 receptor a subunit. These results indicate that efficient interleukin-4 antagonists can be designed on the basis of a sequential two-step activation model. In addition, the experiments indicate the functional participation of the interleukin-4 receptor a subunit in the interleukin-13 receptor system.
KW  - Biochemie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62394
ER  - 
TY  - JOUR
A1  - Tony, H. P.
A1  - Lehrnbecher, T.
A1  - Merz, H.
A1  - Sebald, Werner
A1  - Wilhelm, M.
T1  - Regulation of IL-4 responsiveness in lymphoma B cells
N2  - The responsiveness to IL-4 with and without costimulation with anti-IgM antibodies or phorbolester was studied in 35 cases of low grade non-Hodgkin Iymphoma by analyzing enhancement of CD23 and HLA dass li expression. The predominant phenotype responds directly to IL-4. Separate differentiation states can be distinguished according to coordinate or differential upregulation of CD23 and HLA dass II molecules by IL-4 alone, and differences in responsiveness to anti-IgM antibodies. A particular subgroup of B-lymphoma cells defines a separate stage of B-eeil differentiation. They fail to express high affinity binding sites for IL-4 and accordingly do not respond to IL-4- mediated signals. Cross-linking membrane lgM receptors or direct activation of protein kinase C via phorbolester induces IL-4 receptor expression and subsequent IL-4 reactivity.
KW  - Biochemie
KW  - B lymphocytes
KW  - CD23
KW  - CLL
KW  - HLA class ll
KW  - IL-4
KW  - IL-4-receptor
KW  - membrane immunoglobulin
Y1  - 1991
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62520
ER  - 
TY  - JOUR
A1  - Sebald, Walter
A1  - Wild, G.
T1  - Mitochondrial ATPase complex from Neurospora crassa
N2  - The A TPase eomplex has been isolated from mitoehondria of N eurospora crassa by immunologieal teehniques. The protein ean be obtained rapidly and qua ntitatively in high purity by miero- or large-seale immunopreeipitation. Immunopreeipitation has been applied to labeled and doubly labeled mitoehondrial proteins in order to investigate the number and moleeular weights of subunit polypeptides , the site of synthesis of subunit polypeptides, and the dieycIohexyIcarbodiimide-binding protein . The A TPase complex obtained by large-seale immunopreeipitation has been used as starting ma terial for the isolation of hydrophobie polypeptides.
KW  - Biochemie
Y1  - 1979
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-82065
ER  - 
TY  - JOUR
A1  - Sebald, Walter
A1  - Werner, S
A1  - Weiss, H
T1  - Biogenesis of mitochondrial membrane proteins in Neurospora crassa
N2  - no abstract available
KW  - Biochemie
KW  - Neurospora crassa
Y1  - 1979
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-82055
ER  - 
TY  - JOUR
A1  - Sebald, Walter
A1  - Weiss, H.
A1  - Jackl, G.
T1  - Inhibition of the assembly of cytochrome oxidase in Neurospora crassa by chloramphenicol
N2  - Cytochrome oxidasewas prepared from Neurospora crassa by chromatography on oleyl polymethacrylic acid resin and separated into seven polypeptides by polyacrylamide gel electrophoresis in the presence of sodium dodecylsulfate. Incorporation oflabelled amino acids into the single polypeptideswas investigated after a pulse labelling in the absence and presence of chloramphenicol, and afterwashing out the inhibitor. Chloramphenicol (4 mg/ml) inhibited amino acid incorporation into all polypeptides 90-95%• while labeHing of the whole membrane protein was inhibited only 30%• Mter washing out the inhibitor and further growth of the cells. the four smaller polypeptides were highly labelled, whereas the other polypeptides showed only a. small increase in radioactivity. It is concluded that the four small-sized polypeptides of cytochrome oxidase are synthesized but not integrated into the functional enzyme under the action of chloramphenicol.
KW  - Biochemie
Y1  - 1972
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62852
ER  - 
TY  - JOUR
A1  - Sebald, Walter
A1  - Wachter, E.
A1  - Tzagoloff, A.
T1  - Identification of amino acid substitutions in the dicyclohexylcarbodiimide-binding subunit of the mitochondrial ATPase complex from oligomycin-resistant mutants of Saccharomyces cerevisiae
N2  - No abstract available
KW  - Biochemie
Y1  - 1979
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62770
ER  - 
TY  - JOUR
A1  - Sebald, Walter
A1  - Schwab, A. J.
A1  - Bücher, T.
T1  - Cycloheximide resistant amino acid incorporation into mitochondrial protein from Neurospora crassa in vivo
N2  - No abstract available
KW  - Biochemie
Y1  - 1969
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62900
ER  - 
TY  - JOUR
A1  - Sebald, Walter
A1  - Neupert, W.
A1  - Weiss, H.
T1  - Preparation of Neurospora crassa mitochondria
N2  - The fungus Neurospora crassa represents a eukaryotic cell with high biosynthetic activities. Cell mass doubles in 2-4 hr during expone ntial growth , even in simple salt media with sucrose as the sole carbon source. The microorgani sm forms a mycelium of long hyphae durlng vegetative growth . The mitochondria can be isolated under relatively gentle condi tions since a few breaks in the threadlike hyphae are sufficient to cause the outflow of the organelles. This article describes two methods for the physical disruption of the hyphae : (I) The cell s are opened in a grind mill between two rotating corundum di sks. This is a continuous and fast procedure and allows large- and small-scale preparations of mitochondria. (2) Hyphae are ground with sand in a mortar and pestle. This procedure can be applied to microscale preparations of mitochondria starting with minute amounts of cells. Other procedures for the isolation of Neurospora mitochondria after the physical di sruption or the enzymatic degradation of the cell wall have been described elsewhere
KW  - Biochemie
Y1  - 1979
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-82070
ER  - 
TY  - JOUR
A1  - Sebald, Walter
A1  - Neupert, W.
A1  - Birkmayer, G. D.
T1  - Internal and external contributions to the biogenesis of mitochondrial proteins
N2  - No abstract available
KW  - Biochemie
Y1  - 1970
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62876
ER  - 
TY  - JOUR
A1  - Sebald, Walter
A1  - Machleidt, W.
A1  - Otto, J.
T1  - Products of mitochondrial protein synthesis in Neurospora crassa. Determination of equimolar amounts of three products in cytochrome oxidase on the basis of amino-acid analysis
N2  - Cytochrome oxidase isolated from N eurospora crassa was resolved into seven protein eomponents by eleetrophoresis in polyaerylamide gels eontaining sodium dodeeylsulfate. The apparent molecular weights were determined tobe 41000, 28500, 21000, 16000, 14000, 11500 and 10000 for the eomponents 1, 2, 3, 4, 5, 6, and 7, respectively. The components 1, 2 and 3 are synthesized on mitochondrial ribosomes as shown by the incorporation of radioactive amino aeids in the presenee of cyeloheximide. Amino-acidanalysis of the isolated components 1, 2 and 3 revealed a high content of apolar amino acids and a low eontent of basic amino aeids compared to an average amino-aeid eomposition of components 4-7. Components 1, 2 and 3 eontribute 27.9°/0, 18°/0 and 14.2°/0 to the whole eytoehrome oxidase protein. This was calculated from the contributions of the single eomponents to the totalleueine eontent of the enzyme and the leueine eontents (nmol leueine per mg protein) of the single eomponents as determined by amino-aeid analysis. Equimolar relations of the components 1, 2 and 3 are found by dividing the amounts of protein by their apparent molecular weights. A stoichiometry of 1:1:1 results assuming a minimal molecular weight of 150000 for the whole cytochrome oxidase protein. On the basis of the heme a content a molecular weight of about 70000 per heme group was determined, using an absorption coeffieient L1e605 (redueed minus oxidized) of 12 mM-1 cm-1• It is concluded that the smallest structural unit of eytochrome oxidase contains two heme groups.
KW  - Biochemie
Y1  - 1973
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62827
ER  - 
TY  - JOUR
A1  - Sebald, Walter
A1  - Hofstötter, T.
A1  - Hacker, D.
A1  - Bücher, T.
T1  - Incorporation of amino acids into mitochondrial protein of the flight muscle of Locusta migratoria in vitro and in vivo in the presence of cycloheximide
N2  - No abstract available
KW  - Biochemie
Y1  - 1969
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62919
ER  - 
TY  - JOUR
A1  - Sebald, Walter
A1  - Graf, T.
A1  - Lukins, H. B.
T1  - The dicyclohexylcarbodiimide-binding protein of the mitochondrial ATPase complex from Neurospora crassa and Saccharomyces cerevisiae. Identification and isolation
N2  - Incubation of mitochondria from Neuraspara crassa and Saccharomyces cerevisiae with the radioactive ATPase inhibitor [14C]dicyclohexylcarbodiimide results in the irreversible and rather specific labelling of a low-molecular-weight polypeptide. This dicyclohexylcarbodiimide-binding protein is identical with the smallest subunit (Mr 8000) of the mitochondrial ATPase complex, and it occurs as oligomer, probably as hexamer, in the enzyme protein. The dicyclohexylcarbodiimide-binding protein is extracted from whole mitochondria with neutral chloroformjmethanol both in the free and in the inhibitor-modified form. In Neuraspara and yeast, this extraction is highly selective and the protein is obtained in homogeneaus form when the mitochondria have been prewashed with certain organic solvents. The bound dicyclohexylcarbodiimide Iabel is enriched in the purified protein up to 50-fold compared to whole mitochondria. Based on the amino acid analysis, the dicyclohexylcarbodiimide-binding protein from Neurospora and yeast consists of at least 81 and 76 residues, respectively. The content of hydrophobic residues is extremely high. Histidine and tryptophan are absent. The N-terminal ~mino acid is tyrosine in Neuraspara and formylmethionine in yeast.
KW  - Biochemie
Y1  - 1979
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62792
ER  - 
TY  - JOUR
A1  - Sebald, Walter
A1  - Friedl, P.
A1  - Schairer, H. U.
A1  - Hoppe, J.
T1  - Structure and genetics of the H\(^+\)-conducting F\(_0\) portion of the ATP synthase
N2  - The ATP synthase occurs in remarkably conserved form in procaryotic and eucaryotic cells. Thus, our present knowledge of ATP synthase is derived from sturlies of the enzyme from different organisms, each affering specific experimental possibilities. In recent tim es, research on the H\(^+\) -conducting F0 part of the ATP synthase has been greatly stimulated by two developments in the Escherichio coli system. Firstly, the purification and reconstitution of the whole ATP synthase as weil as the proton conductor Fa from E. coli have been achieved. These functionally active preparations are well defined in terms of subunit composition, similar to the thermophilic enzyme from PS-3 studied by Kagawa's group.u Secondly, the genetics and the molecular cloning of the genes of all the F\(_0\) subunits from E. coli yielded information on the function of subunit polypeptides and essential amino acid residues. Furthermore, the amino acid sequence of hydrophobic F\(_0\) subunits, which are difficult to analyze by protein-chemical techniques, could be derived from the nucleotide sequence of the genes. These achievements, which shall be briefly summarized in the next part of this communication, provide the framework to study specific aspects of the structure and function of the F\(_0\) subunits.
KW  - Biochemie
Y1  - 1982
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62733
ER  - 
TY  - JOUR
A1  - Sebald, Walter
A1  - Bücher, T.
A1  - Olbrich, B.
A1  - Kaudewitz, F.
T1  - Electrophoretic pattern of and amino acid incorporation in vitro into the insoluble mitochondrial protein of neurospora crassa wild type and mi-1 mutant
N2  - No abstract available
KW  - Biochemie
Y1  - 1968
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62926
ER  - 
TY  - JOUR
A1  - Sebald, Walter
T1  - Biogenesis of mitochondrial ATPase
N2  - No abstract available
KW  - Biochemie
Y1  - 1977
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-47362
ER  - 
TY  - JOUR
A1  - Schwarz, Klaus
A1  - Hameister, Horst
A1  - Gessler, Manfred
A1  - Grzeschik, Karl-Heinz
A1  - Hansen-Hagge, Thomas E.
A1  - Bartram, Claus R.
T1  - Confirmation of the localization of the human recombination activating gene 1 (RAG1) to chromosome 11p13
N2  - The human recombination activating gene 1 (RAGl) has previously been mapped to chromosomes 14q and 11 p. Here we confirm the chromosome 11 assignment by two independent approaches: autoradiographic and fluorescence in situ hybridization to metaphase spreads and analysis of human-hamster somatic cell hybrid DNA by the polymerase chain reaction (PCR) and Southern blotting. Our results unequivocally localize RAG1 to llp13.
KW  - Biochemie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-59136
ER  - 
TY  - JOUR
A1  - Schwartz, Faina
A1  - Neve, Rachel
A1  - Eisenman, Robert
A1  - Gessler, Manfred
A1  - Bruns, Gail
T1  - A WAGR region gene between PAX-6 and FSHB expressed in fetal brain
N2  - Developmental delay or mental retardation is a frequent component of multi-system anomaly syndromes associated with chromosomal deletions. Isolation of genes involved in the mental dysfunction in these disorders should define loci important in brain formation or function. We have identified a highly conserved locus in the distal part of 11 p 13 that is prominently expressed in fetal brain. Minimal expression is observed in a number of other fetal tissues. The gene maps distal to PAX-6 but proximal to the loci for brain-derived neurotrophic factor (BDNF) and the beta subunit of follicle stimulating hormone (FSHB), within a region previously implicated in the mental retardation component of some WAGR syndrome patients. Within fetal brain, the corresponding transcript is prominent in frontal, motor and primary visual cortex as weil as in the caudate-putamen. The characteristics of this gene, including the striking evolutionary conservation at the locus, suggest that the encoded protein may function in brain development.
KW  - Biochemie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-59125
ER  - 
TY  - JOUR
A1  - Schwab, A. J.
A1  - Sebald, Walter
A1  - Weiss, H.
T1  - Different pool sizes of the precursor polypeptides of cytochrome oxidase from Neurospora crassa.
N2  - Pulse-labelling experiments with growing Neurospora crassa revealed that the polypeptides composing the protein moiety of a cytochrome oxidase preparation are derived from at least four independent pools of precursor polypeptides. The pool sizes range from 2 ° f 0 to 25 °/0 of the amount of the corresponding polypeptide present in cytochrome oxidase. The smallest pool is assigned to a polypeptide of mitochondrial origm. Serial pools were found for one of the polypeptides.
KW  - Biochemie
Y1  - 1972
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62841
ER  - 
TY  - JOUR
A1  - Schmidt, B.
A1  - Wachter, E.
A1  - Sebald, Walter
A1  - Neupert, W.
T1  - Processing peptidase of Neurospora mitochondria. Two-step cleavage of imported ATPase subunit 9
N2  - Subunit 9 (dicyclohexylcarbodümide binding protein, 'proteolipid') of the mitochondrial F 1F0-ATPase is a nuclearly coded protein in Neurospora crassa. lt is synthesized on free cytoplasmic ribosomes as a larger precursor with an NH2-terminal peptide extension. The peptide extension is cleaved ofT after transport of the protein into the mitochondria. A processing activity referred to as processing peptidase that cleaves the precursor to subunit 9 and other mitochondrial proteins is described and characterized using a cell-free system. Precursor synthesized in vitro was incubated with extracts of mitochondria. Processing peptidase required Mn2 + for its activity. Localization studies suggested that it is a soluble component of the mitochondrial matrix. The precursor was cleaved in two sequential steps via an intermediate-sized polypeptide. The intermediate form in the processing of subunit 9 was also seen in vivo and upon import of the precursor into isolated mitochondria in vitro. The two dcavage sites in the precursor molecule were determined. The data indicate that: {a) the correct NH2-terminus of the mature protein was generated, (b) the NH2-terminal amino acid of the intermediate-sized polypeptide is isoleueine in position -31. The cleavage sites show similarity ofprimary structure. It is concluded that processing peptidase removes the peptide extension from the precursor to subunit 9 (and probably other precursors) after translocation of these polypeptides (or the NHrterminal part of these polypeptides) into the matrix space of mitochondria.
KW  - Biochemie
Y1  - 1984
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62674
ER  - 
TY  - JOUR
A1  - Schairer, H. U.
A1  - Hoppe, J.
A1  - Sebald, Walter
A1  - Friedl, P.
T1  - Topological and functional aspects of the proton conductor, F\(_0\), of the Escherichia coli ATP-synthase
N2  - The isolated H\(^+\) conductor, F\(_0\) , of the Escherichia co1i ATP-synthase consists of three subunits, a, b, and c. H\(^+\) -permeable liposomes can be reconstit~ted with F\(_0\) and lipids; addition of F\(_1\)-ATPase reconstitutes a functional ATP-synthase. Mutants with altered or misslng F\(_0\) subunits are defective in H\(^+\) conduction. Thus, all three subunits are necessary for the expression of H\(^+\) conduction. The subunits a and b contain binding sites for F\(_1\)• Computer calculations, cross-links, membrane-permeating photo-reactive labels, and proteases were used to develop tentative structural models for the individual F\(_0\) subunits.
KW  - Biochemie
Y1  - 1982
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62721
ER  - 
TY  - JOUR
A1  - Römisch, J.
A1  - Tropschug, M.
A1  - Sebald, Walter
A1  - Weiss, H.
T1  - The primary structure of cytochrome c\(_1\) from Neurospora crassa
N2  - No abstract available
KW  - Biochemie
Y1  - 1987
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62578
ER  - 
TY  - JOUR
A1  - Reusch, P.
A1  - Arnold, S.
A1  - Heusser, C.
A1  - Wagner, K.
A1  - Weston, B.
A1  - Sebald, Walter
T1  - Neutralizing monoclonal antibodies define two different functional sites in human interleukin-4
N2  - Human interleukin-4 (IL-4) is a small four-helix-bundle protein which is essential for organizing defense reactions against macroparasites, in particular helminths. Human IL-4 also appears to exert a pathophysiological role during various IgE-mediated allergic diseases. Seven different monoclonal antibodies neutralizing the activity of human IL-4 were studied in order to identify functionally important epitopes. A collection of 41 purified IL-4 variants was used to analyse how defined amino acid replacements affect binding affinity for each individual mAb. Specific amino acid positions could be assigned to four different epitopes. mAbs recognizing epitopes on helix A and/or C interfered with IL-4 receptor binding and thus inhibited IL-4 function. However, other mAbs also inhibiting IL-4 function recognized an epitope on helix D of IL-4 and did not inhibit IL-4 binding to the receptor protein. One mAb, recognizing N-terminal and C-terminal residues, partially competed for binding to the receptor. The results of these mAb epitope analyses confirm and extend previous data on the functional consequences of the amino acid replacements which showed that amino acid residues in helices A and C of IL-4 provide a binding site for the cloned IL-4 receptor and that a signalling site in helix D interacts with a further receptor protein.
KW  - Biochemie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62418
ER  - 
TY  - JOUR
A1  - Preiser, J. C.
A1  - Schmartz, D.
A1  - Van der Linden, P.
A1  - Content, J.
A1  - Vanden Bussche, P.
A1  - Buurman, W.
A1  - Sebald, Werner
A1  - Dupont, E.
A1  - Pinsky, M. R.
A1  - Vincent, J. L.
T1  - Interleukin-6 administration has no acute hemodynamic or hematologic effect in the dog
N2  - To investigate the possible hemodynamic efl'ects of interleukin-6 (IL-6), a single dose of 15 mcg/kg of recombinant IL-6 isolated from Escherichia coli was injected intravenously in six pentobarbital-anesthetized dogs. After 30 min, saline infusion was performed to maintain the - pulmonary artery balloon-occluded pressure at baseline Ievel. The animals were observed for up to 5 hours. No other hemodynamic alteration was observed than a gradual decline in cardiac output attributed to anesthesia. Hematologic variables, blood glucose, and total serum proteins were also constant. IL-6 levels were markedly elevated in the blood, bot no tumor necrosis factor activity was detected. Thus a primary role for IL-6 in the early cardiovascular alterations associated with septic shock seems unlikely.
KW  - Biochemie
Y1  - 1991
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62511
ER  - 
TY  - JOUR
A1  - Poulat, F.
A1  - Morin, D.
A1  - Konig, A.
A1  - Brun, P.
A1  - Giltay, J.
A1  - Sultan, C.
A1  - Dumas, R.
A1  - Gessler, Manfred
A1  - Berta, P.
T1  - Distinct molecular origins for Denys-Drash and Frasier syndromes
N2  - The direct involvment of the Wilm's tumor suppressor gene (WTl) in Denys-Drash syndrome through mutations within exons 8 or 9 has recently been established. The absence of such alterations in three patients with Frasier syndrome provides a molecular basis for distinguishing these two syndromes that are associated with streak gonads, pseudohermaphroditism and renal failure.
KW  - Biochemie
Y1  - 1993
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-59172
ER  - 
TY  - JOUR
A1  - Neupert, W.
A1  - Sebald, Walter
A1  - Schwab, A. J.
A1  - Pfaller, A.
A1  - Bücher, T.
T1  - Puromycin sensitivity of ribosomal label after incorporation of \(^{14}\)C-labelled amino acids into isolated mitochondria from Neurospora crassa
N2  - Radioactive amino acids were incorporated into isolated mitochondria from Neurospora crassa. Then the mitochondrial ribosomes were isolated and submitted to density gradient centrifugation. A preferential labelling of polysomes was observed. However, when the mitochondrial suspension was treated with puromycin after amino acid incorporation, no radioactivity could be detected in either the monosomes or the polysomes. The conclusion is drawn that isolated mitochondria under these conditions do not incorporate significant amounts of amino acids into proteins of their ribosomes.
KW  - Biochemie
Y1  - 1969
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62899
ER  - 
TY  - JOUR
A1  - Neupert, W.
A1  - Sebald, Walter
A1  - Schwab, A. J.
A1  - Massinger, P.
A1  - Bücher, T.
T1  - Incorporation in vivo of \(^{14}\)C-labelled amino acids into the proteins of mitochondrial ribosomes from Neurospora crassa sensitive to cycloheximide and insensitive to Chloramphenicol
N2  - Radioactive amino acids were incorporated in vivo into N eurospora crassa cells, and the mitochondrial ribosomes were isolated. The incorporation of radioactivity into the proteins of these ribosomes was inhibited by cycloheximide, but not by chloramphenicol. It is therefore concluded that these proteins are synthesized on the cycloheximide sensitive and chloramphenicol insensitive cytoplasmic ribosomes.
KW  - Biochemie
Y1  - 1969
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62884
ER  - 
TY  - JOUR
A1  - Müller, T.
A1  - Sebald, Walter
A1  - Oschkinat, H.
T1  - Antagonist design through forced electrostatic mismatch
N2  - No abstract available
KW  - Biochemie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62408
ER  - 
TY  - JOUR
A1  - Müller, T.
A1  - Dieckmann, T.
A1  - Sebald, Walter
A1  - Oschkinat, H.
T1  - Aspects of receptor binding and signalling of interleukin-4 investigated by site-directed mutagenesis and NMR spectroscopy
N2  - Cytokines are hormones that carry information from ceJI to ceH. This information is read from their surface upon binding to transmembrane receptors and by the subsequent initiation of receptor oligomerization. An inftuence on this process through mutagenesis on the hormone surface is highly desirab)e for medical reasons. However, an understanding of hormone-receptor interactions requires insight into the structural changes introduced by the mutations. In this line structural studies on human TL-4 and the medically important IL-4 antagonists YI24D and Y124G are presented. The site a.round YI24 is an important epitope responsible for the a.bility of 11-4 t.o ca.use a signal in the target cells. It is shown that the local main-chain structure around residue 124 in the variants remains unchanged. A strategy is presented here which allows the study of these types of proteins and their variants by NMR which does not require carbon Iabeiied sa.mples.
KW  - Biochemie
KW  - Interleukin-4
KW  - protein structure
KW  - NMR
KW  - signal transduction
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62444
ER  - 
TY  - JOUR
A1  - Michel, R.
A1  - Wachter, E.
A1  - Sebald, Walter
T1  - Synthesis of a larger precursor for the proteolipid subunit of the mitochondrial ATPase complex of Neurospora crassa in a cell-free wheat germ system
N2  - No abstract available
KW  - Biochemie
Y1  - 1979
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62789
ER  - 
TY  - JOUR
A1  - Merz, H.
A1  - Fliedner, A.
A1  - Orscheschek, K.
A1  - Binder, T.
A1  - Sebald, Walter
A1  - Müller-Hermelink, H. K.
A1  - Feller, A. C.
T1  - Cytokine expression in T-cell lymphomas and Hodgkin's disease. Its possible implication in autocrine or paracrine production as a potential basis for neoplastic growth
N2  - No abstract available
KW  - Biochemie
Y1  - 1991
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62483
ER  - 
TY  - JOUR
A1  - Merz, H.
A1  - Fliedner, A.
A1  - Lehrnbecher, T.
A1  - Sebald, Walter
A1  - Müller-Hermelink, H. K.
A1  - Feller, A. C.
T1  - Cytokine expression in B-cell non-Hodgkin lymphomas
N2  - No abstract available
KW  - Biochemie
Y1  - 1990
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62539
ER  - 
TY  - JOUR
A1  - McCarthy, J. E.
A1  - Sebald, Walter
A1  - Gross, G.
A1  - Lammers, R.
T1  - Enhancement of translational efficiency by the Escherichia coli atpE translational initiation region: its fusion with two human genes
N2  - No abstract available
KW  - Biochemie
Y1  - 1986
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62626
ER  - 
TY  - JOUR
A1  - McCarthy, J. E.
A1  - Schairer, H. U.
A1  - Sebald, Walter
T1  - Translational initiation frequency of atp genes from Escherichia coli: identification of an intercistronic sequence that enhances translation
N2  - The c, b and ö subunit genes of the Escherichia coli atp operon were cloned individually in an expression vector between the tac fusion promoter and the galK gene. The relative rates of subunit synthesis directed by the cloned genes were similar in vitro andin vivo and compared favourably with the subunit stoichiometry of the assembled proton-translocating A TP synthase of E. coli in vivo. The rate of synthesis of subunit c was at least six times that of subunit b and 18 times that of subunit ö. Progressive shortening of the long intercistronic sequence lying upstream of the subunit c gene showed that maximal expression of this gene is dependent upon the presence of a sequence stretching > 20 bp upstream of the Shine-Dalgarno site. This sequence thus acts to enhance the rate of translational initiation. The possibility that similar sequences might perform the same function in other operons of E. coli and bacteriophage A is also discussed. Translation of the subunit b cistron is partially coupled to translation of the preceding subunit c cistron. In conclusion, the expression of all the atp operon genes could be adjusted to accommodate the subunit requirements of A TP synthase assembly primarily by means of mechanisms which control the efficiency of translational initiation and re-initiation at the respective cistron start codons.
KW  - Biochemie
KW  - E. coli atp operon
KW  - subunit stoichiometry
KW  - in vitro and in vivo expression
KW  - translational initiation
Y1  - 1985
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62657
ER  - 
TY  - JOUR
A1  - Lindenmaier, W.
A1  - Dittmar, K. E.
A1  - Hauser, H.
A1  - Necker, A.
A1  - Sebald, Walter
T1  - Isolation of a functional human interleukin 2 gene from a cosmid library by recombination in vivo
N2  - A method has been developed that allows the isolation of genomic clones from a cosmid library by homologaus recombination in vivo. This method was used to isolate a human genomic interleukin 2 (IL2) gene. The genomic cosmid library was packaged in vivo into A. phage particles. A recombination-proficient host strain carrying IL2 cDNA sequences in a non-homologaus plasmid vector was infected by the packaged cosmid library. After in vivo packaging and reinfection, recombinants carrying the antibiotic resistance genes of both vectors were selected. From a recombinant cosmid clone the chromosomal IL2 genewas restored. After DNA mediated gene transfer into mouse Ltk- cells human IL2 was expressed constitutively.
KW  - Biochemie
KW  - Recombinant DNA
KW  - DNA mediated gene transfer
KW  - expression plasmid
KW  - screening
KW  - packaging
KW  - bacteriophage lambda
Y1  - 1985
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62662
ER  - 
TY  - JOUR
A1  - Lehrnbecher, T.
A1  - Poot, M.
A1  - Orscheschek, K.
A1  - Sebald, Walter
A1  - Feller, A. C.
A1  - Merz, H.
T1  - Interleukin 7 as interleukin 9 drives phytohemagglutinin-activated T cells through several cell cycles; no synergism between interleukin 7, interleukin 9 and interleukin 4
N2  - The effects of the interlenkins IL-7 and IL-9 on cell cycle progression were investigated by conventional [3H]thymidine incorporation and by the bivariate BrdU/Hoechst technique. 8oth IL· 7 and IL-9 drive phytohemagglutinin-activated T cells through more than one cell cycle, but IL-7 wasmorepotent on cell cycle progression than IL-9. Neither synergistic nor inhibitory effects were seen between various combinations of the lymphokines IL-7, IL-9 and IL-4 compared to each lymphokine alone. When T cells are activated with phytohemagglutinin for 3 days, all or most IL-4 responsive cells respond to IL-7 as weil, whereas only a part of IL-7 responders are IL-4 responders. In contrast, when T cells are activated with phytohemagglutinin for 7 days, the quantitative data of the cell cycle distribution soggest that the population of IL-7 responders is at least an overlapping, if not a real subset of the population of the IL-4 responders.
KW  - Biochemie
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62438
ER  - 
TY  - JOUR
A1  - Lehrnbecher, T.
A1  - Merz, H.
A1  - Sebald, Walter
A1  - Poot, M.
T1  - Interleukin 4 drives phytohemagglutinin-activated T cells through several cell cycles: no synergism between interleukin 2 and interleukin 4
N2  - Cell kinetic studies of T cells stimulated with the interleukin 2 (11-2), D-4, or both lymphokines were performed with conventional [3H] thymidine incorporation and with the bivariate BrdU/Hoechst technique. 11-2 and 11-4 are able to drive phytohemagglutininactivated T cells through more than one cell cycle. Neither synergistic nor inhibitory efl'ect on T -cell proliferationwas seen for the stimulation with both 11-2 and 11-4 as compared with the effect ofll-2 alone. The quantitative data ofthe cell cycle distribution ofphytohemagglutininactivated T cells suggestthat the population ofll-4-responsive cells is at least an overlapping population, if not a real subset of the ·population of the 11-2-responsive cells.
KW  - Biochemie
KW  - BrdU-Hoechst
KW  - cell cycle
KW  - flow cytometry
KW  - interleukin 2
KW  - interleukin 4
Y1  - 1991
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62491
ER  - 
TY  - JOUR
A1  - Kübler, N.
A1  - Reuther, J.
A1  - Kirchner, T.
A1  - Pfaff, M.
A1  - Müller-Hermelink, H. K.
A1  - Albert, R.
A1  - Sebald, Walter
T1  - IgG monoclonal antibodies that inhibit osteoinductivity of human bone matrix-derived proteins (hBMP/NCP)
N2  - Monoclonal hBMP/NCP (human bone morphogenetic protein anrl associaterl noncollagenous proteins) antiborlies of the lgG class were prorlucerl. In vitro, 12 of 19 hBMP/NCP antiborlies showerl functional inhibition of hBMP/ NCP-induced chondroneogenesis in a neonatal muscle tissue assay. Inducing factors were characterized by their inhibiting antibodies with immunoblotting. Several peptide factors seem to be involved in the cascade of inducerl chondro- and osteogenesis.
KW  - Biochemie
KW  - bone morphogenetic proteins
KW  - neutralizing antibodies
KW  - cartilage induction
Y1  - 1994
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-62388
ER  -