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Article: TonB-dependent receptors in nitrogen-fixing nodulating bacteria

TitleTonB-dependent receptors in nitrogen-fixing nodulating bacteria
Authors
KeywordsHeme
Iron
Leghemoglobin
Rhizobacteria
TonB-dependent receptor
Issue Date2010
PublisherNihon Biseibutsu Seitai Gakkai. The Journal's web site is located at http://www.jstage.jst.go.jp/browse/jsme2/_vols/-char/en
Citation
Microbes and Environments, 2010, v. 25 n. 2, p. 67-74 How to Cite?
AbstractTonB-dependent receptors (TBDRs) allow Gram-negative bacteria to uptake scarce resources from competitive environments with very high affinity. Early reports on TBDRs focused on the uptake of siderophore-iron complexes but recent studies have showed that the spectrum of ligands includes sugars, vitamins, heme, and other non-ferrous cations. To investigate the possible roles of TBDRs in nitrogen-fixing, nodulating bacteria, a bioinformatics approach was adopted to identify their presence in the genome of 13 selected rhizobacteria. The number of TBDR-like genes ranged from 1 (Mesorhizobium loti MAFF303099) to 14 (Azorhizobium caulinodans ORS 571 and Methylobacterium nodulans ORS 2060). These TBDRs can be largely grouped into two clusters, the 'heme' cluster and the 'iron-siderophores' cluster. The only exceptions are a putative nickel-specific TBDR (bll6948) in Bradyrhizobium japonicum USDA110 and two putative sugar-specific TBDRs in B. japonicum USDA110 and A. caulinodans ORS571 genomes, respectively. No TBDR-like sequences lie in the 'Vitamin B12' or 'Non-Fe cations' clusters. A model of the biological roles of TBDRs in free-living and symbiotic states is proposed for B. japonicum.
Persistent Identifierhttp://hdl.handle.net/10722/130018
ISSN
2015 Impact Factor: 2.075
2015 SCImago Journal Rankings: 1.267
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLim, BLen_US
dc.date.accessioned2010-12-23T08:45:39Z-
dc.date.available2010-12-23T08:45:39Z-
dc.date.issued2010en_US
dc.identifier.citationMicrobes and Environments, 2010, v. 25 n. 2, p. 67-74en_US
dc.identifier.issn1342-6311en_US
dc.identifier.urihttp://hdl.handle.net/10722/130018-
dc.description.abstractTonB-dependent receptors (TBDRs) allow Gram-negative bacteria to uptake scarce resources from competitive environments with very high affinity. Early reports on TBDRs focused on the uptake of siderophore-iron complexes but recent studies have showed that the spectrum of ligands includes sugars, vitamins, heme, and other non-ferrous cations. To investigate the possible roles of TBDRs in nitrogen-fixing, nodulating bacteria, a bioinformatics approach was adopted to identify their presence in the genome of 13 selected rhizobacteria. The number of TBDR-like genes ranged from 1 (Mesorhizobium loti MAFF303099) to 14 (Azorhizobium caulinodans ORS 571 and Methylobacterium nodulans ORS 2060). These TBDRs can be largely grouped into two clusters, the 'heme' cluster and the 'iron-siderophores' cluster. The only exceptions are a putative nickel-specific TBDR (bll6948) in Bradyrhizobium japonicum USDA110 and two putative sugar-specific TBDRs in B. japonicum USDA110 and A. caulinodans ORS571 genomes, respectively. No TBDR-like sequences lie in the 'Vitamin B12' or 'Non-Fe cations' clusters. A model of the biological roles of TBDRs in free-living and symbiotic states is proposed for B. japonicum.-
dc.languageengen_US
dc.publisherNihon Biseibutsu Seitai Gakkai. The Journal's web site is located at http://www.jstage.jst.go.jp/browse/jsme2/_vols/-char/en-
dc.relation.ispartofMicrobes and Environmentsen_US
dc.subjectHeme-
dc.subjectIron-
dc.subjectLeghemoglobin-
dc.subjectRhizobacteria-
dc.subjectTonB-dependent receptor-
dc.titleTonB-dependent receptors in nitrogen-fixing nodulating bacteriaen_US
dc.typeArticleen_US
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1342-6311&volume=25&issue=2&spage=67&epage=74&date=2010&atitle=TonB-dependent+receptors+in+nitrogen-fixing+nodulating+bacteriaen_US
dc.identifier.emailLim, BL: bllim@hkucc.hku.hken_US
dc.identifier.authorityLim, BL=rp00744en_US
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1264/jsme2.ME10102-
dc.identifier.pmid21576856-
dc.identifier.scopuseid_2-s2.0-77954545618-
dc.identifier.hkuros177670en_US
dc.identifier.volume25en_US
dc.identifier.issue2-
dc.identifier.spage67en_US
dc.identifier.epage74-
dc.identifier.isiWOS:000278125100001-

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