The xylan utilization system of the plant pathogen Xanthomonas campestris pv campestris controls epiphytic life and reveals common features with oligotrophic bacteria and animal gut symbionts

Bibliographische Detailangaben
Veröffentlicht in:	The New phytologist. - 1979. - 198(2013), 3 vom: 25. Mai, Seite 899-915
1. Verfasser:	Déjean, Guillaume (VerfasserIn)
Weitere Verfasser:	Blanvillain-Baufumé, Servane, Boulanger, Alice, Darrasse, Armelle, de Bernonville, Thomas Dugé, Girard, Anne-Laure, Carrére, Sébastien, Jamet, Stevie, Zischek, Claudine, Lautier, Martine, Solé, Magali, Büttner, Daniela, Jacques, Marie-Agnès, Lauber, Emmanuelle, Arlat, Matthieu
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2013
Zugriff auf das übergeordnete Werk:	The New phytologist
Schlagworte:	Journal Article Research Support, Non-U.S. Gov't Bacterial Outer Membrane Proteins Membrane Transport Proteins Oligosaccharides Xylans Xylose A1TA934AKO Xylosidases EC 3.2.1.-

Beschreibung
Zusammenfassung:	© 2013 CNRS. New Phytologist © 2013 New Phytologist Trust. Xylan is a major structural component of plant cell wall and the second most abundant plant polysaccharide in nature. Here, by combining genomic and functional analyses, we provide a comprehensive picture of xylan utilization by Xanthomonas campestris pv campestris (Xcc) and highlight its role in the adaptation of this epiphytic phytopathogen to the phyllosphere. The xylanolytic activity of Xcc depends on xylan-deconstruction enzymes but also on transporters, including two TonB-dependent outer membrane transporters (TBDTs) which belong to operons necessary for efficient growth in the presence of xylo-oligosaccharides and for optimal survival on plant leaves. Genes of this xylan utilization system are specifically induced by xylo-oligosaccharides and repressed by a LacI-family regulator named XylR. Part of the xylanolytic machinery of Xcc, including TBDT genes, displays a high degree of conservation with the xylose-regulon of the oligotrophic aquatic bacterium Caulobacter crescentus. Moreover, it shares common features, including the presence of TBDTs, with the xylan utilization systems of Bacteroides ovatus and Prevotella bryantii, two gut symbionts. These similarities and our results support an important role for TBDTs and xylan utilization systems for bacterial adaptation in the phyllosphere, oligotrophic environments and animal guts
Beschreibung:	Date Completed 25.11.2013 Date Revised 20.04.2021 published: Print-Electronic Citation Status MEDLINE
ISSN:	1469-8137
DOI:	10.1111/nph.12187