A network of conserved damage survival pathways revealed by a genomic RNAi screen.
Damage initiates a pleiotropic cellular response aimed at cellular survival when appropriate. To identify genes required for damage survival, we used a cell-based RNAi screen against the Drosophila genome and the alkylating agent methyl methanesulphonate (MMS). Similar studies performed in other mod...
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2009-06-01
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| Series: | PLoS Genetics |
| Online Access: | https://journals.plos.org/plosgenetics/article/file?id=10.1371/journal.pgen.1000527&type=printable |
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| author | Dashnamoorthy Ravi Amy M Wiles Selvaraj Bhavani Jianhua Ruan Philip Leder Alexander J R Bishop |
| author_facet | Dashnamoorthy Ravi Amy M Wiles Selvaraj Bhavani Jianhua Ruan Philip Leder Alexander J R Bishop |
| author_sort | Dashnamoorthy Ravi |
| collection | DOAJ |
| description | Damage initiates a pleiotropic cellular response aimed at cellular survival when appropriate. To identify genes required for damage survival, we used a cell-based RNAi screen against the Drosophila genome and the alkylating agent methyl methanesulphonate (MMS). Similar studies performed in other model organisms report that damage response may involve pleiotropic cellular processes other than the central DNA repair components, yet an intuitive systems level view of the cellular components required for damage survival, their interrelationship, and contextual importance has been lacking. Further, by comparing data from different model organisms, identification of conserved and presumably core survival components should be forthcoming. We identified 307 genes, representing 13 signaling, metabolic, or enzymatic pathways, affecting cellular survival of MMS-induced damage. As expected, the majority of these pathways are involved in DNA repair; however, several pathways with more diverse biological functions were also identified, including the TOR pathway, transcription, translation, proteasome, glutathione synthesis, ATP synthesis, and Notch signaling, and these were equally important in damage survival. Comparison with genomic screen data from Saccharomyces cerevisiae revealed no overlap enrichment of individual genes between the species, but a conservation of the pathways. To demonstrate the functional conservation of pathways, five were tested in Drosophila and mouse cells, with each pathway responding to alkylation damage in both species. Using the protein interactome, a significant level of connectivity was observed between Drosophila MMS survival proteins, suggesting a higher order relationship. This connectivity was dramatically improved by incorporating the components of the 13 identified pathways within the network. Grouping proteins into "pathway nodes" qualitatively improved the interactome organization, revealing a highly organized "MMS survival network." We conclude that identification of pathways can facilitate comparative biology analysis when direct gene/orthologue comparisons fail. A biologically intuitive, highly interconnected MMS survival network was revealed after we incorporated pathway data in our interactome analysis. |
| format | Article |
| id | doaj-art-4e61075476a44eb2ba75d0f0f3ea33b0 |
| institution | OA Journals |
| issn | 1553-7390 1553-7404 |
| language | English |
| publishDate | 2009-06-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS Genetics |
| spelling | doaj-art-4e61075476a44eb2ba75d0f0f3ea33b02025-08-20T02:00:46ZengPublic Library of Science (PLoS)PLoS Genetics1553-73901553-74042009-06-0156e100052710.1371/journal.pgen.1000527A network of conserved damage survival pathways revealed by a genomic RNAi screen.Dashnamoorthy RaviAmy M WilesSelvaraj BhavaniJianhua RuanPhilip LederAlexander J R BishopDamage initiates a pleiotropic cellular response aimed at cellular survival when appropriate. To identify genes required for damage survival, we used a cell-based RNAi screen against the Drosophila genome and the alkylating agent methyl methanesulphonate (MMS). Similar studies performed in other model organisms report that damage response may involve pleiotropic cellular processes other than the central DNA repair components, yet an intuitive systems level view of the cellular components required for damage survival, their interrelationship, and contextual importance has been lacking. Further, by comparing data from different model organisms, identification of conserved and presumably core survival components should be forthcoming. We identified 307 genes, representing 13 signaling, metabolic, or enzymatic pathways, affecting cellular survival of MMS-induced damage. As expected, the majority of these pathways are involved in DNA repair; however, several pathways with more diverse biological functions were also identified, including the TOR pathway, transcription, translation, proteasome, glutathione synthesis, ATP synthesis, and Notch signaling, and these were equally important in damage survival. Comparison with genomic screen data from Saccharomyces cerevisiae revealed no overlap enrichment of individual genes between the species, but a conservation of the pathways. To demonstrate the functional conservation of pathways, five were tested in Drosophila and mouse cells, with each pathway responding to alkylation damage in both species. Using the protein interactome, a significant level of connectivity was observed between Drosophila MMS survival proteins, suggesting a higher order relationship. This connectivity was dramatically improved by incorporating the components of the 13 identified pathways within the network. Grouping proteins into "pathway nodes" qualitatively improved the interactome organization, revealing a highly organized "MMS survival network." We conclude that identification of pathways can facilitate comparative biology analysis when direct gene/orthologue comparisons fail. A biologically intuitive, highly interconnected MMS survival network was revealed after we incorporated pathway data in our interactome analysis.https://journals.plos.org/plosgenetics/article/file?id=10.1371/journal.pgen.1000527&type=printable |
| spellingShingle | Dashnamoorthy Ravi Amy M Wiles Selvaraj Bhavani Jianhua Ruan Philip Leder Alexander J R Bishop A network of conserved damage survival pathways revealed by a genomic RNAi screen. PLoS Genetics |
| title | A network of conserved damage survival pathways revealed by a genomic RNAi screen. |
| title_full | A network of conserved damage survival pathways revealed by a genomic RNAi screen. |
| title_fullStr | A network of conserved damage survival pathways revealed by a genomic RNAi screen. |
| title_full_unstemmed | A network of conserved damage survival pathways revealed by a genomic RNAi screen. |
| title_short | A network of conserved damage survival pathways revealed by a genomic RNAi screen. |
| title_sort | network of conserved damage survival pathways revealed by a genomic rnai screen |
| url | https://journals.plos.org/plosgenetics/article/file?id=10.1371/journal.pgen.1000527&type=printable |
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