TY  - JOUR
A1  - Naseem, Muhammad
A1  - Osmanoğlu, Özge
A1  - Kaltdorf, Martin
A1  - Alblooshi, Afnan Ali M. A.
A1  - Iqbal, Jibran
A1  - Howari, Fares M.
A1  - Srivastava, Mugdha
A1  - Dandekar, Thomas
T1  - Integrated framework of the immune-defense transcriptional signatures in the Arabidopsis shoot apical meristem
JF  - International Journal of Molecular Sciences
N2  - The growing tips of plants grow sterile; therefore, disease-free plants can be generated from them. How plants safeguard growing apices from pathogen infection is still a mystery. The shoot apical meristem (SAM) is one of the three stem cells niches that give rise to the above ground plant organs. This is very well explored; however, how signaling networks orchestrate immune responses against pathogen infections in the SAM remains unclear. To reconstruct a transcriptional framework of the differentially expressed genes (DEGs) pertaining to various SAM cellular populations, we acquired large-scale transcriptome datasets from the public repository Gene Expression Omnibus (GEO). We identify here distinct sets of genes for various SAM cellular populations that are enriched in immune functions, such as immune defense, pathogen infection, biotic stress, and response to salicylic acid and jasmonic acid and their biosynthetic pathways in the SAM. We further linked those immune genes to their respective proteins and identify interactions among them by mapping a transcriptome-guided SAM-interactome. Furthermore, we compared stem-cells regulated transcriptome with innate immune responses in plants showing transcriptional separation among their DEGs in Arabidopsis. Besides unleashing a repertoire of immune-related genes in the SAM, our analysis provides a SAM-interactome that will help the community in designing functional experiments to study the specific defense dynamics of the SAM-cellular populations. Moreover, our study promotes the essence of large-scale omics data re-analysis, allowing a fresh look at the SAM-cellular transcriptome repurposing data-sets for new questions.
KW  - defense signaling
KW  - shoot apical meristem
KW  - CLV3p
KW  - meta-transcriptome
KW  - system inference
KW  - stem-cell-triggered immunity
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-285730
SN  - 1422-0067
VL  - 21
IS  - 16
ER  - 
TY  - JOUR
A1  - Naseem, Muhammad
A1  - Othman, Eman M.
A1  - Fathy, Moustafa
A1  - Iqbal, Jibran
A1  - Howari, Fares M.
A1  - AlRemeithi, Fatima A.
A1  - Kodandaraman, Geema
A1  - Stopper, Helga
A1  - Bencurova, Elena
A1  - Vlachakis, Dimitrios
A1  - Dandekar, Thomas
T1  - Integrated structural and functional analysis of the protective effects of kinetin against oxidative stress in mammalian cellular systems
JF  - Scientific Reports
N2  - Metabolism and signaling of cytokinins was first established in plants, followed by cytokinin discoveries in all kingdoms of life. However, understanding of their role in mammalian cells is still scarce. Kinetin is a cytokinin that mitigates the effects of oxidative stress in mammalian cells. The effective concentrations of exogenously applied kinetin in invoking various cellular responses are not well standardized. Likewise, the metabolism of kinetin and its cellular targets within the mammalian cells are still not well studied. Applying vitality tests as well as comet assays under normal and hyper-oxidative states, our analysis suggests that kinetin concentrations of 500 nM and above cause cytotoxicity as well as genotoxicity in various cell types. However, concentrations below 100 nM do not cause any toxicity, rather in this range kinetin counteracts oxidative burst and cytotoxicity. We focus here on these effects. To get insights into the cellular targets of kinetin mediating these pro-survival functions and protective effects we applied structural and computational approaches on two previously testified targets for these effects. Our analysis deciphers vital residues in adenine phosphoribosyltransferase (APRT) and adenosine receptor (A2A-R) that facilitate the binding of kinetin to these two important human cellular proteins. We finally discuss how the therapeutic potential of kinetin against oxidative stress helps in various pathophysiological conditions.
KW  - cytokinins
KW  - 6-benzylaminopurine
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-231317
VL  - 10
ER  -