Systems Based Mapping Demonstrates That Recovery from Alkylation Damage Requires DNA Repair, RNA Processing, and Translation Associated Networks
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The identification of cellular responses to damage can promote mechanistic insight into stress signalling. We have screened a library of 3968 Escherichia coli gene-deletion mutants to identify 99 gene products that modulate the toxicity of the alkylating agent methyl methanesulfonate (MMS). We have developed an ontology mapping approach to identify functional categories over-represented with MMS-toxicity modulating proteins and demonstrate that, in addition to DNA re-synthesis (replication, recombination, and repair), proteins involved in mRNA processing and translation influence viability after MMS damage. We have also mapped our MMS-toxicity modulating proteins onto an E. coli protein interactome and identified a sub-network consisting of 32 proteins functioning in DNA repair, mRNA processing, and translation. Clustering coefficient analysis identified seven highly connected MMS-toxicity modulating proteins associated with translation and mRNA processing, with the high connectivity suggestive of a coordinated response. Corresponding results from reporter assays support the idea that the SOS response is influenced by activities associated with the mRNA-translation interface.
Col B, Kurkcu M, Di Bek E Biol Trace Elem Res. 2024; 202(12):5771-5793.
PMID: 38466471 PMC: 11502571. DOI: 10.1007/s12011-024-04129-0.
Kruszewska-Naczk B, Grinholc M, Waleron K, Bandow J, Rapacka-Zdonczyk A Microbiol Spectr. 2023; 12(1):e0249023.
PMID: 38063383 PMC: 10782963. DOI: 10.1128/spectrum.02490-23.
Stortz J, Serafim T, Alsford S, Wilkes J, Fernandez-Cortes F, Hamilton G PLoS Pathog. 2017; 13(7):e1006477.
PMID: 28742144 PMC: 5542689. DOI: 10.1371/journal.ppat.1006477.
Noguchi Y, Katayama T Front Microbiol. 2016; 7:239.
PMID: 26973617 PMC: 4776307. DOI: 10.3389/fmicb.2016.00239.
Chan C, Deng W, Li F, Demott M, Babu I, Begley T Chem Res Toxicol. 2015; 28(5):978-88.
PMID: 25772370 PMC: 4438938. DOI: 10.1021/acs.chemrestox.5b00004.