title: Relationship of Yersinia pseudotuberculosis O antigens IA, IIA, and IVB: the IIA gene cluster was derived from that of IVB.
abstract: O antigen is part of the lipopolysaccharide present in the outer membrane of gram-negative bacteria and is highly polymorphic. In this study, we obtained sequences of the O-antigen gene clusters for the Yersinia pseudotuberculosis antigens IA, IIA, and IVB. We propose that the IIA gene cluster was derived from the IVB cluster, one of the very few cases in which a parent gene cluster is identified, and that the IA gene cluster could be a hybrid of the IVB and IB gene clusters. All three O antigens contain 6-deoxy-D-mannoheptose, and we identified six genes for the biosynthetic pathway for the precursor of this sugar, GDP-6-deoxy-D-mannoheptose.
authors: Department of Microbiology, The University of Sydney, Sydney, New South Wales 2006, Australia.
authors: Elvia
authors: E
authors: Pacinelli
authors: Lei
authors: L
authors: Wang
authors: Peter R
authors: PR
authors: Reeves
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics; D001483:Base Sequence; D002236:Carbohydrate Conformation; D002352:Carrier Proteins / Q000235:genetics; D004269:DNA, Bacterial / Q000302:isolation & purification; D006539:Heptoses / Q000096:biosynthesis; D006601:Hexoses / Q000096:biosynthesis; D006602:Hexosyltransferases / Q000235:genetics; D008565:Membrane Proteins; D008969:Molecular Sequence Data; D005810:Multigene Family; D019081:O Antigens / Q000235:genetics*; D010957:Plasmids; D017422:Sequence Analysis, DNA; D015011:Yersinia pseudotuberculosis / Q000235:genetics*
chemical_list: D001426:Bacterial Proteins; D002352:Carrier Proteins; D004269:DNA, Bacterial; D006539:Heptoses; D006601:Hexoses; D008565:Membrane Proteins; D019081:O Antigens; C117254:RfbX protein, Pseudomonas; C413547:mannoheptose; C075969:rol protein, Bacteria; C009616:tyvelose; D006602:Hexosyltransferases; C085652:O-antigen polymerase