TY  - JOUR
A1  - Härtlein, Michael
A1  - Schiessl, Sigrid
A1  - Wagner, Wilma
A1  - Rdest, Ursula
A1  - Kreft, Jürgen
A1  - Goebel, Werner
T1  - Transport of hemolysin by Escherichia coli
N2  - No abstract available
KW  - Biologie
KW  - Hemolysin
KW  - Escberichia coli
KW  - Gene cloning
KW  - Expression
KW  - Transport
Y1  - 1983
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-60619
ER  - 
TY  - JOUR
A1  - Kreft, Jürgen
A1  - Burger, Klaus J.
A1  - Goebel, Werner
T1  - Expression of antibiotic resistance genes from Escherichia coli in Bacillus subtilis
N2  - Bifunctional recombinant plasmids were constructed, comprised of the E. coli vectors pBR322, pBR325 and pACYC184 and different plasmids from Gram-positive bacteria, e.g. pBSU161-1 of B. subtilis and pUB110 and pC221 of S. aureus. The beta-lactamase (bla) gene and the chloramphenicol acetyltransferase (cat) gene from the E. coli plasmids were not transcribed and therefore not expressed in B. subtilis. However, tetracycline resistance from the E. coli plasmids was expressed in B. subtilis. Transcription of the tetracycline resistance gene(s) started in B. subtilis at or near the original E. coli promoter, the sequence of which is almost identical with the sequence recognized by σ<sup>55</sup> of B. subtilis RNA polymerase.
KW  - Biologie
Y1  - 1983
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-60600
ER  - 
TY  - JOUR
A1  - Kreft, Jürgen
A1  - Berger, Harald
A1  - Härtlein, Michael
A1  - Müller, Bodo
A1  - Weidinger, Gerhard
A1  - Goebel, Werner
T1  - Cloning and expression in Escherichia coli and Bacillus subtilis of the hemolysin (cereolysin) determinant from Bacillus cereus
N2  - From a cosmid gene bank of Bacillus cereus GP4 in Escherichia coli we isolated clones which, after several days of incubation, formed hemolysis zones on erythrocyte agar plates. These clones contained recombinant cosmids with B. cereus DNA insertions of varying lengths which shared some common restriction fragments. The smallest insertionwas recloned as aPstl fragment into pJKK3-1, a shuttle vector which repücates in Bacillus subtilis and E. coli. When this recombinant plasmid (pJKK3-1 hly-1) was transformed into E. coli, it caused hemolysis on erythrocyte agar plates, but in liquid assays no extemal or intemal hemolytic activity could be detected with the E. coli transformants. B. subtilis carrying the same plasmid exhibited hemolytic activity at Ievels comparable to those ofthe B. cereus donor strain. The hemolysin produced in B. subtilis seemed to be indistinguishable from cereolysin in its sensitivity to cholesterol, activation by dithiothreitol, and inactivation by antibodies raised against cereolysin. When the recombinant DNA carrying the cereolysin gene was used as a probe in hybridization experiments with chromosomal DNA from a streptolysin 0-producing strain of Streptococcus pyogenes or from üsteriolysin-producing strains of Usteria monoeytogenes, no positive hybridization signals were obtained. These data soggest that the genes for these three SH-activated cytolysins do not have extended sequence homology.
KW  - Biologie
Y1  - 1983
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-60596
ER  -