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Two-component signal transduction pathways regulating growth and cell cycle progression in a bacterium: a system-level analysis
Two-component signal transduction systems, comprised of histidine kinases and their response regulator substrates, are the predominant means by which bacteria sense and respond to extracellular signals. These systems allow cells to adapt to prevailing conditions by modifying cellular physiology, inc...
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Published in: | PLoS biology 2005-10, Vol.3 (10), p.e334-e334 |
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description | Two-component signal transduction systems, comprised of histidine kinases and their response regulator substrates, are the predominant means by which bacteria sense and respond to extracellular signals. These systems allow cells to adapt to prevailing conditions by modifying cellular physiology, including initiating programs of gene expression, catalyzing reactions, or modifying protein-protein interactions. These signaling pathways have also been demonstrated to play a role in coordinating bacterial cell cycle progression and development. Here we report a system-level investigation of two-component pathways in the model organism Caulobacter crescentus. First, by a comprehensive deletion analysis we show that at least 39 of the 106 two-component genes are required for cell cycle progression, growth, or morphogenesis. These include nine genes essential for growth or viability of the organism. We then use a systematic biochemical approach, called phosphotransfer profiling, to map the connectivity of histidine kinases and response regulators. Combining these genetic and biochemical approaches, we identify a new, highly conserved essential signaling pathway from the histidine kinase CenK to the response regulator CenR, which plays a critical role in controlling cell envelope biogenesis and structure. Depletion of either cenK or cenR leads to an unusual, severe blebbing of cell envelope material, whereas constitutive activation of the pathway compromises cell envelope integrity, resulting in cell lysis and death. We propose that the CenK-CenR pathway may be a suitable target for new antibiotic development, given previous successes in targeting the bacterial cell wall. Finally, the ability of our in vitro phosphotransfer profiling method to identify signaling pathways that operate in vivo takes advantage of an observation that histidine kinases are endowed with a global kinetic preference for their cognate response regulators. We propose that this system-wide selectivity insulates two-component pathways from one another, preventing unwanted cross-talk. |
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These systems allow cells to adapt to prevailing conditions by modifying cellular physiology, including initiating programs of gene expression, catalyzing reactions, or modifying protein-protein interactions. These signaling pathways have also been demonstrated to play a role in coordinating bacterial cell cycle progression and development. Here we report a system-level investigation of two-component pathways in the model organism Caulobacter crescentus. First, by a comprehensive deletion analysis we show that at least 39 of the 106 two-component genes are required for cell cycle progression, growth, or morphogenesis. These include nine genes essential for growth or viability of the organism. We then use a systematic biochemical approach, called phosphotransfer profiling, to map the connectivity of histidine kinases and response regulators. Combining these genetic and biochemical approaches, we identify a new, highly conserved essential signaling pathway from the histidine kinase CenK to the response regulator CenR, which plays a critical role in controlling cell envelope biogenesis and structure. Depletion of either cenK or cenR leads to an unusual, severe blebbing of cell envelope material, whereas constitutive activation of the pathway compromises cell envelope integrity, resulting in cell lysis and death. We propose that the CenK-CenR pathway may be a suitable target for new antibiotic development, given previous successes in targeting the bacterial cell wall. Finally, the ability of our in vitro phosphotransfer profiling method to identify signaling pathways that operate in vivo takes advantage of an observation that histidine kinases are endowed with a global kinetic preference for their cognate response regulators. We propose that this system-wide selectivity insulates two-component pathways from one another, preventing unwanted cross-talk.</description><identifier>ISSN: 1545-7885</identifier><identifier>ISSN: 1544-9173</identifier><identifier>EISSN: 1545-7885</identifier><identifier>DOI: 10.1371/journal.pbio.0030334</identifier><identifier>PMID: 16176121</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Bacteriology ; BASIC BIOLOGICAL SCIENCES ; Biochemistry ; Biochemistry & molecular biology ; Caulobacter crescentus ; Caulobacter crescentus - cytology ; Caulobacter crescentus - genetics ; Caulobacter crescentus - physiology ; Cell cycle ; Cell Cycle - physiology ; Cell cycle and cell division ; Cloning ; Enzymes ; Eubacteria ; Gene Deletion ; Gene expression ; Gene Expression Profiling ; Gene Expression Regulation, Bacterial ; Genetics/Genomics/Gene Therapy ; Histidine ; Histidine Kinase ; Life sciences & biomedicine - other topics ; Microbiology ; Phosphorylation ; Protein Kinases - genetics ; Protein Kinases - metabolism ; Proteins ; Regulator genes ; Signal transduction ; Signal Transduction - physiology ; Xylose</subject><ispartof>PLoS biology, 2005-10, Vol.3 (10), p.e334-e334</ispartof><rights>2005 Skerker et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited: Skerker JM, Prasol MS, Perchuk BS, Biondi EG, Laub MT (2005) Two-Component Signal Transduction Pathways Regulating Growth and Cell Cycle Progression in a Bacterium: A System-Level Analysis. 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These systems allow cells to adapt to prevailing conditions by modifying cellular physiology, including initiating programs of gene expression, catalyzing reactions, or modifying protein-protein interactions. These signaling pathways have also been demonstrated to play a role in coordinating bacterial cell cycle progression and development. Here we report a system-level investigation of two-component pathways in the model organism Caulobacter crescentus. First, by a comprehensive deletion analysis we show that at least 39 of the 106 two-component genes are required for cell cycle progression, growth, or morphogenesis. These include nine genes essential for growth or viability of the organism. We then use a systematic biochemical approach, called phosphotransfer profiling, to map the connectivity of histidine kinases and response regulators. 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cytology</topic><topic>Caulobacter crescentus - genetics</topic><topic>Caulobacter crescentus - physiology</topic><topic>Cell cycle</topic><topic>Cell Cycle - physiology</topic><topic>Cell cycle and cell division</topic><topic>Cloning</topic><topic>Enzymes</topic><topic>Eubacteria</topic><topic>Gene Deletion</topic><topic>Gene expression</topic><topic>Gene Expression Profiling</topic><topic>Gene Expression Regulation, Bacterial</topic><topic>Genetics/Genomics/Gene Therapy</topic><topic>Histidine</topic><topic>Histidine Kinase</topic><topic>Life sciences & biomedicine - other topics</topic><topic>Microbiology</topic><topic>Phosphorylation</topic><topic>Protein Kinases - genetics</topic><topic>Protein Kinases - metabolism</topic><topic>Proteins</topic><topic>Regulator genes</topic><topic>Signal transduction</topic><topic>Signal Transduction - physiology</topic><topic>Xylose</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Skerker, Jeffrey M</creatorcontrib><creatorcontrib>Prasol, Melanie S</creatorcontrib><creatorcontrib>Perchuk, Barrett S</creatorcontrib><creatorcontrib>Biondi, Emanuele G</creatorcontrib><creatorcontrib>Laub, Michael T</creatorcontrib><creatorcontrib>Harvard Univ., Cambridge, MA (United States)</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Animal Behavior Abstracts</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Ecology Abstracts</collection><collection>Entomology Abstracts (Full archive)</collection><collection>Immunology Abstracts</collection><collection>Neurosciences Abstracts</collection><collection>Nucleic Acids Abstracts</collection><collection>Health & Medical Collection (Proquest)</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni)</collection><collection>ProQuest Central</collection><collection>ProQuest Agriculture & Environmental Science Database</collection><collection>ProQuest Central Essentials</collection><collection>Biological Science Collection</collection><collection>ProQuest Central</collection><collection>ProQuest Natural Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Engineering Research Database</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Central Student</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Biological Sciences</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>PML(ProQuest Medical Library)</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biological Science Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environmental Science Database</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Environmental Science Collection</collection><collection>Genetics Abstracts</collection><collection>MEDLINE - Academic</collection><collection>OSTI.GOV - Hybrid</collection><collection>OSTI.GOV</collection><collection>PubMed Central (Full Participant titles)</collection><collection>DOAJ Directory of Open Access Journals</collection><collection>PLoS Biology</collection><jtitle>PLoS biology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Skerker, Jeffrey M</au><au>Prasol, Melanie S</au><au>Perchuk, Barrett S</au><au>Biondi, Emanuele G</au><au>Laub, Michael T</au><aucorp>Harvard Univ., Cambridge, MA (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Two-component signal transduction pathways regulating growth and cell cycle progression in a bacterium: a system-level analysis</atitle><jtitle>PLoS biology</jtitle><addtitle>PLoS Biol</addtitle><date>2005-10-01</date><risdate>2005</risdate><volume>3</volume><issue>10</issue><spage>e334</spage><epage>e334</epage><pages>e334-e334</pages><issn>1545-7885</issn><issn>1544-9173</issn><eissn>1545-7885</eissn><notes>ObjectType-Article-1</notes><notes>SourceType-Scholarly Journals-1</notes><notes>ObjectType-Feature-2</notes><notes>content type line 23</notes><notes>FG03-01ER63219; FG02-04ER63922</notes><notes>National Institutes of Health (NIH)</notes><notes>USDOE Office of Science (SC), Biological and Environmental Research (BER)</notes><abstract>Two-component signal transduction systems, comprised of histidine kinases and their response regulator substrates, are the predominant means by which bacteria sense and respond to extracellular signals. These systems allow cells to adapt to prevailing conditions by modifying cellular physiology, including initiating programs of gene expression, catalyzing reactions, or modifying protein-protein interactions. These signaling pathways have also been demonstrated to play a role in coordinating bacterial cell cycle progression and development. Here we report a system-level investigation of two-component pathways in the model organism Caulobacter crescentus. First, by a comprehensive deletion analysis we show that at least 39 of the 106 two-component genes are required for cell cycle progression, growth, or morphogenesis. These include nine genes essential for growth or viability of the organism. We then use a systematic biochemical approach, called phosphotransfer profiling, to map the connectivity of histidine kinases and response regulators. Combining these genetic and biochemical approaches, we identify a new, highly conserved essential signaling pathway from the histidine kinase CenK to the response regulator CenR, which plays a critical role in controlling cell envelope biogenesis and structure. Depletion of either cenK or cenR leads to an unusual, severe blebbing of cell envelope material, whereas constitutive activation of the pathway compromises cell envelope integrity, resulting in cell lysis and death. We propose that the CenK-CenR pathway may be a suitable target for new antibiotic development, given previous successes in targeting the bacterial cell wall. Finally, the ability of our in vitro phosphotransfer profiling method to identify signaling pathways that operate in vivo takes advantage of an observation that histidine kinases are endowed with a global kinetic preference for their cognate response regulators. We propose that this system-wide selectivity insulates two-component pathways from one another, preventing unwanted cross-talk.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>16176121</pmid><doi>10.1371/journal.pbio.0030334</doi><oa>free_for_read</oa></addata></record> |
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subjects | Bacteriology BASIC BIOLOGICAL SCIENCES Biochemistry Biochemistry & molecular biology Caulobacter crescentus Caulobacter crescentus - cytology Caulobacter crescentus - genetics Caulobacter crescentus - physiology Cell cycle Cell Cycle - physiology Cell cycle and cell division Cloning Enzymes Eubacteria Gene Deletion Gene expression Gene Expression Profiling Gene Expression Regulation, Bacterial Genetics/Genomics/Gene Therapy Histidine Histidine Kinase Life sciences & biomedicine - other topics Microbiology Phosphorylation Protein Kinases - genetics Protein Kinases - metabolism Proteins Regulator genes Signal transduction Signal Transduction - physiology Xylose |
title | Two-component signal transduction pathways regulating growth and cell cycle progression in a bacterium: a system-level analysis |
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