The RpoN2‐PilRX regulatory system governs type IV pilus gene transcription and is required for bacterial motility and virulence in Xanthomonas oryzae pv. oryzae

The type IV pilus (T4P), a special class of bacterial surface filament, plays crucial roles in surface adhesion, motility, biofilm formation, and virulence in pathogenic bacteria. However, the regulatory mechanism of T4P and its relationship to bacterial virulence are still little understood in Xant...

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Veröffentlicht in:Molecular plant pathology 2020-05, Vol.21 (5), p.652-666
Hauptverfasser: Yu, Chao, Nguyen, Doan-Phuong, Ren, Zhaoyu, Liu, Jianan, Yang, Fenghuan, Tian, Fang, Fan, Susu, Chen, Huamin
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container_issue 5
container_start_page 652
container_title Molecular plant pathology
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creator Yu, Chao
Nguyen, Doan-Phuong
Ren, Zhaoyu
Liu, Jianan
Yang, Fenghuan
Tian, Fang
Fan, Susu
Chen, Huamin
description The type IV pilus (T4P), a special class of bacterial surface filament, plays crucial roles in surface adhesion, motility, biofilm formation, and virulence in pathogenic bacteria. However, the regulatory mechanism of T4P and its relationship to bacterial virulence are still little understood in Xanthomonas oryzae pv. oryzae (Xoo), the causal pathogen of bacterial blight of rice. Our previous studies showed that the σ54 factor RpoN2 regulated bacterial virulence on rice in a flagellum‐independent manner in Xoo. In this study, both yeast two‐hybrid and pull‐down assays revealed that RpoN2 directly and specifically interacted with PilRX, a homolog of the response regulator PilR of the two‐component system PilS‐PilR in the pilus gene cluster. Genomic sequence and reverse transcription PCR (RT‐PCR) analysis showed 13 regulons containing 25 genes encoding T4P structural components and putative regulators. A consensus RpoN2‐binding sequence GGN10GC was identified in the promoter sequences of most T4P gene transcriptional units. Electrophoretic mobility shift assays confirmed the direct binding of RpoN2 to the promoter of the major pilin gene pilAX, the inner membrane platform protein gene pilCX, and pilRX. Promoter activity and quantitative RT‐PCR assays demonstrated direct and indirect transcriptional regulation by RpoN2 of the T4P genes. In addition, individual deletions of pilAX, pilCX, and pilRX resulted in significantly reduced twitching and swimming motility, biofilm formation, and virulence in rice. Taken together, the findings from the current study suggest that the RpoN2‐PilRX regulatory system controls bacterial motility and virulence by regulating T4P gene transcription in Xoo. The σ54 factor RpoN2 directly interacts with PilRX, and controls bacterial motility and virulence by regulating type IV pilus gene transcription in Xanthomonas oryzae pv. oryzae.
doi_str_mv 10.1111/mpp.12920
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However, the regulatory mechanism of T4P and its relationship to bacterial virulence are still little understood in Xanthomonas oryzae pv. oryzae (Xoo), the causal pathogen of bacterial blight of rice. Our previous studies showed that the σ54 factor RpoN2 regulated bacterial virulence on rice in a flagellum‐independent manner in Xoo. In this study, both yeast two‐hybrid and pull‐down assays revealed that RpoN2 directly and specifically interacted with PilRX, a homolog of the response regulator PilR of the two‐component system PilS‐PilR in the pilus gene cluster. Genomic sequence and reverse transcription PCR (RT‐PCR) analysis showed 13 regulons containing 25 genes encoding T4P structural components and putative regulators. A consensus RpoN2‐binding sequence GGN10GC was identified in the promoter sequences of most T4P gene transcriptional units. Electrophoretic mobility shift assays confirmed the direct binding of RpoN2 to the promoter of the major pilin gene pilAX, the inner membrane platform protein gene pilCX, and pilRX. Promoter activity and quantitative RT‐PCR assays demonstrated direct and indirect transcriptional regulation by RpoN2 of the T4P genes. In addition, individual deletions of pilAX, pilCX, and pilRX resulted in significantly reduced twitching and swimming motility, biofilm formation, and virulence in rice. Taken together, the findings from the current study suggest that the RpoN2‐PilRX regulatory system controls bacterial motility and virulence by regulating T4P gene transcription in Xoo. The σ54 factor RpoN2 directly interacts with PilRX, and controls bacterial motility and virulence by regulating type IV pilus gene transcription in Xanthomonas oryzae pv. oryzae.</description><identifier>ISSN: 1464-6722</identifier><identifier>EISSN: 1364-3703</identifier><identifier>DOI: 10.1111/mpp.12920</identifier><identifier>PMID: 32112711</identifier><language>eng</language><publisher>England: John Wiley &amp; Sons, Inc</publisher><subject>Assaying ; Bacteria ; Bacterial Proteins - genetics ; Bacterial Proteins - metabolism ; Binding ; Biofilms ; Biosynthesis ; Blight ; Cell adhesion &amp; migration ; Conserved sequence ; Deoxyribonucleic acid ; DNA ; Electrophoretic mobility ; Electrophoretic Mobility Shift Assay ; Flagella ; Gene expression ; Gene Expression Regulation, Bacterial - genetics ; Gene Expression Regulation, Bacterial - physiology ; Gene regulation ; Genes ; Genetic aspects ; Genetic research ; Genetic transcription ; Homology ; Kinases ; Membrane proteins ; Motility ; Original ; Oryza - microbiology ; Pilin ; Pilin gene ; PilRX ; Plasmids ; Promoter Regions, Genetic - genetics ; Promoters (Genetics) ; Proteins ; Regulatory mechanisms (biology) ; Reverse transcription ; Rice ; RNA polymerase ; Swimming ; Twitching ; Two-Hybrid System Techniques ; type IV pilus ; Virulence ; Virulence (Microbiology) ; Virulence - genetics ; Virulence - physiology ; Xanthomonas - pathogenicity ; Xanthomonas oryzae ; Xanthomonas oryzae pv. oryzae ; Yeasts ; σ54</subject><ispartof>Molecular plant pathology, 2020-05, Vol.21 (5), p.652-666</ispartof><rights>2020 The Authors. published by British Society for Plant Pathology and John Wiley &amp; Sons Ltd</rights><rights>2020 The Authors. Molecular Plant Pathology published by British Society for Plant Pathology and John Wiley &amp; Sons Ltd.</rights><rights>COPYRIGHT 2020 John Wiley &amp; Sons, Inc.</rights><rights>2020. This work is published under http://creativecommons.org/licenses/by-nc/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4820-9dcacda0a6079eacd631b132b0251ade4780dfb190f5767f486cd5282e9f54b03</citedby><cites>FETCH-LOGICAL-c4820-9dcacda0a6079eacd631b132b0251ade4780dfb190f5767f486cd5282e9f54b03</cites><orcidid>0000-0001-7409-8328 ; 0000-0003-3645-9895</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC7170775/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC7170775/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,864,885,1417,11562,27924,27925,45574,45575,46052,46476,53791,53793</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/32112711$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Yu, Chao</creatorcontrib><creatorcontrib>Nguyen, Doan-Phuong</creatorcontrib><creatorcontrib>Ren, Zhaoyu</creatorcontrib><creatorcontrib>Liu, Jianan</creatorcontrib><creatorcontrib>Yang, Fenghuan</creatorcontrib><creatorcontrib>Tian, Fang</creatorcontrib><creatorcontrib>Fan, Susu</creatorcontrib><creatorcontrib>Chen, Huamin</creatorcontrib><title>The RpoN2‐PilRX regulatory system governs type IV pilus gene transcription and is required for bacterial motility and virulence in Xanthomonas oryzae pv. oryzae</title><title>Molecular plant pathology</title><addtitle>Mol Plant Pathol</addtitle><description>The type IV pilus (T4P), a special class of bacterial surface filament, plays crucial roles in surface adhesion, motility, biofilm formation, and virulence in pathogenic bacteria. However, the regulatory mechanism of T4P and its relationship to bacterial virulence are still little understood in Xanthomonas oryzae pv. oryzae (Xoo), the causal pathogen of bacterial blight of rice. Our previous studies showed that the σ54 factor RpoN2 regulated bacterial virulence on rice in a flagellum‐independent manner in Xoo. In this study, both yeast two‐hybrid and pull‐down assays revealed that RpoN2 directly and specifically interacted with PilRX, a homolog of the response regulator PilR of the two‐component system PilS‐PilR in the pilus gene cluster. Genomic sequence and reverse transcription PCR (RT‐PCR) analysis showed 13 regulons containing 25 genes encoding T4P structural components and putative regulators. A consensus RpoN2‐binding sequence GGN10GC was identified in the promoter sequences of most T4P gene transcriptional units. Electrophoretic mobility shift assays confirmed the direct binding of RpoN2 to the promoter of the major pilin gene pilAX, the inner membrane platform protein gene pilCX, and pilRX. Promoter activity and quantitative RT‐PCR assays demonstrated direct and indirect transcriptional regulation by RpoN2 of the T4P genes. In addition, individual deletions of pilAX, pilCX, and pilRX resulted in significantly reduced twitching and swimming motility, biofilm formation, and virulence in rice. Taken together, the findings from the current study suggest that the RpoN2‐PilRX regulatory system controls bacterial motility and virulence by regulating T4P gene transcription in Xoo. The σ54 factor RpoN2 directly interacts with PilRX, and controls bacterial motility and virulence by regulating type IV pilus gene transcription in Xanthomonas oryzae pv. oryzae.</description><subject>Assaying</subject><subject>Bacteria</subject><subject>Bacterial Proteins - genetics</subject><subject>Bacterial Proteins - metabolism</subject><subject>Binding</subject><subject>Biofilms</subject><subject>Biosynthesis</subject><subject>Blight</subject><subject>Cell adhesion &amp; migration</subject><subject>Conserved sequence</subject><subject>Deoxyribonucleic acid</subject><subject>DNA</subject><subject>Electrophoretic mobility</subject><subject>Electrophoretic Mobility Shift Assay</subject><subject>Flagella</subject><subject>Gene expression</subject><subject>Gene Expression Regulation, Bacterial - genetics</subject><subject>Gene Expression Regulation, Bacterial - physiology</subject><subject>Gene regulation</subject><subject>Genes</subject><subject>Genetic aspects</subject><subject>Genetic research</subject><subject>Genetic transcription</subject><subject>Homology</subject><subject>Kinases</subject><subject>Membrane proteins</subject><subject>Motility</subject><subject>Original</subject><subject>Oryza - microbiology</subject><subject>Pilin</subject><subject>Pilin gene</subject><subject>PilRX</subject><subject>Plasmids</subject><subject>Promoter Regions, Genetic - genetics</subject><subject>Promoters (Genetics)</subject><subject>Proteins</subject><subject>Regulatory mechanisms (biology)</subject><subject>Reverse transcription</subject><subject>Rice</subject><subject>RNA polymerase</subject><subject>Swimming</subject><subject>Twitching</subject><subject>Two-Hybrid System Techniques</subject><subject>type IV pilus</subject><subject>Virulence</subject><subject>Virulence (Microbiology)</subject><subject>Virulence - genetics</subject><subject>Virulence - physiology</subject><subject>Xanthomonas - pathogenicity</subject><subject>Xanthomonas oryzae</subject><subject>Xanthomonas oryzae pv. oryzae</subject><subject>Yeasts</subject><subject>σ54</subject><issn>1464-6722</issn><issn>1364-3703</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>24P</sourceid><sourceid>WIN</sourceid><sourceid>EIF</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp1Uctu1DAUjRCIlsKCH0CWWLGYqe08nGyQqopHpUJHVUHdWY5zM-MqsVPbGRRWfALf0E_rl3DbTCtY4I2P7HPPPfeeJHnN6JLhOeyHYcl4xemTZJ-lRbZIBU2fIs4QF4LzveRFCFeUMlHx_Hmyl3LGuGBsP7m52AA5H9xXfvvr98p055fEw3rsVHR-ImEKEXqydlvwNpA4DUBOvpPBdGMga7BAolc2aG-GaJwlyjbEBFS4Ho2HhrTOk1rpCN6ojvQums7E6Z62NX7swGogxpJLZePG9c6qQLDvTwVk2C538GXyrFVdgFe7-yD59vHDxfHnxenZp5Pjo9OFzkpOF1WjlW4UVQUVFSAsUlazlNeU50w1kImSNm3NKtrmohBtVha6yXnJoWrzrKbpQfJ-1h3GuodGg8XhOjl40ys_SaeM_PfHmo3E1UjBBBUiR4G3OwHvrkcIUV650Vv0LHla4cpLzhmyljNrrTqQxrYOxdA6WuyNdhZag-9HAjNKeV7eFbybC7R3IXhoHy0xKu_yl5i_vM8fuW_-nuGR-RA4Eg5nwg_sMv1fSX5ZrWbJP0LQvyQ</recordid><startdate>202005</startdate><enddate>202005</enddate><creator>Yu, Chao</creator><creator>Nguyen, Doan-Phuong</creator><creator>Ren, Zhaoyu</creator><creator>Liu, Jianan</creator><creator>Yang, Fenghuan</creator><creator>Tian, Fang</creator><creator>Fan, Susu</creator><creator>Chen, Huamin</creator><general>John Wiley &amp; 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However, the regulatory mechanism of T4P and its relationship to bacterial virulence are still little understood in Xanthomonas oryzae pv. oryzae (Xoo), the causal pathogen of bacterial blight of rice. Our previous studies showed that the σ54 factor RpoN2 regulated bacterial virulence on rice in a flagellum‐independent manner in Xoo. In this study, both yeast two‐hybrid and pull‐down assays revealed that RpoN2 directly and specifically interacted with PilRX, a homolog of the response regulator PilR of the two‐component system PilS‐PilR in the pilus gene cluster. Genomic sequence and reverse transcription PCR (RT‐PCR) analysis showed 13 regulons containing 25 genes encoding T4P structural components and putative regulators. A consensus RpoN2‐binding sequence GGN10GC was identified in the promoter sequences of most T4P gene transcriptional units. Electrophoretic mobility shift assays confirmed the direct binding of RpoN2 to the promoter of the major pilin gene pilAX, the inner membrane platform protein gene pilCX, and pilRX. Promoter activity and quantitative RT‐PCR assays demonstrated direct and indirect transcriptional regulation by RpoN2 of the T4P genes. In addition, individual deletions of pilAX, pilCX, and pilRX resulted in significantly reduced twitching and swimming motility, biofilm formation, and virulence in rice. Taken together, the findings from the current study suggest that the RpoN2‐PilRX regulatory system controls bacterial motility and virulence by regulating T4P gene transcription in Xoo. The σ54 factor RpoN2 directly interacts with PilRX, and controls bacterial motility and virulence by regulating type IV pilus gene transcription in Xanthomonas oryzae pv. oryzae.</abstract><cop>England</cop><pub>John Wiley &amp; Sons, Inc</pub><pmid>32112711</pmid><doi>10.1111/mpp.12920</doi><tpages>15</tpages><orcidid>https://orcid.org/0000-0001-7409-8328</orcidid><orcidid>https://orcid.org/0000-0003-3645-9895</orcidid><oa>free_for_read</oa></addata></record>
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subjects Assaying
Bacteria
Bacterial Proteins - genetics
Bacterial Proteins - metabolism
Binding
Biofilms
Biosynthesis
Blight
Cell adhesion & migration
Conserved sequence
Deoxyribonucleic acid
DNA
Electrophoretic mobility
Electrophoretic Mobility Shift Assay
Flagella
Gene expression
Gene Expression Regulation, Bacterial - genetics
Gene Expression Regulation, Bacterial - physiology
Gene regulation
Genes
Genetic aspects
Genetic research
Genetic transcription
Homology
Kinases
Membrane proteins
Motility
Original
Oryza - microbiology
Pilin
Pilin gene
PilRX
Plasmids
Promoter Regions, Genetic - genetics
Promoters (Genetics)
Proteins
Regulatory mechanisms (biology)
Reverse transcription
Rice
RNA polymerase
Swimming
Twitching
Two-Hybrid System Techniques
type IV pilus
Virulence
Virulence (Microbiology)
Virulence - genetics
Virulence - physiology
Xanthomonas - pathogenicity
Xanthomonas oryzae
Xanthomonas oryzae pv. oryzae
Yeasts
σ54
title The RpoN2‐PilRX regulatory system governs type IV pilus gene transcription and is required for bacterial motility and virulence in Xanthomonas oryzae pv. oryzae
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-01T12%3A07%3A50IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-gale_pubme&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=The%20RpoN2%E2%80%90PilRX%20regulatory%20system%20governs%20type%20IV%20pilus%20gene%20transcription%20and%20is%20required%20for%20bacterial%20motility%20and%20virulence%20in%20Xanthomonas%20oryzae%20pv.%20oryzae&rft.jtitle=Molecular%20plant%20pathology&rft.au=Yu,%20Chao&rft.date=2020-05&rft.volume=21&rft.issue=5&rft.spage=652&rft.epage=666&rft.pages=652-666&rft.issn=1464-6722&rft.eissn=1364-3703&rft_id=info:doi/10.1111/mpp.12920&rft_dat=%3Cgale_pubme%3EA732132581%3C/gale_pubme%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2392118221&rft_id=info:pmid/32112711&rft_galeid=A732132581&rfr_iscdi=true