title: The Yersinia pestis YscY protein directly binds YscX, a secreted component of the type III secretion machinery.
abstract: Human pathogenic yersiniae organisms export and translocate the Yop virulence proteins and V antigen upon contact with a eukaryotic cell. Yersinia pestis mutants defective for production of YscX or YscY were unable to export the Yops and V antigen. YscX and YscY were both present in the Y. pestis cell pellet fraction; however, YscX was also found in the culture supernatant. YscY showed structural and amino acid sequence similarities to the Syc family of proteins. YscY specifically recognized and bound to a region of YscX that included a predicted coiled-coil region. These data suggest that YscY may function as a chaperone for YscX in Y. pestis.
authors.affiliation: Department of Microbiology and Immunology, University of Miami School of Medicine, Miami, Florida 33101, USA.
authors.forename: J B
authors.initials: JB
authors.lastname: Day
authors.forename: G V
authors.initials: GV
authors.lastname: Plano
mesh_terms: D000595:Amino Acid Sequence; D000942:Antigens, Bacterial / Q000378:metabolism; D001425:Bacterial Outer Membrane Proteins / Q000378:metabolism; D001426:Bacterial Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D001665:Binding Sites; D001692:Biological Transport; D002352:Carrier Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D003593:Cytoplasm / Q000737:chemistry; D005798:Genes, Bacterial / Q000235:genetics / Q000502:physiology; D008565:Membrane Proteins; D018832:Molecular Chaperones / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D008969:Molecular Sequence Data; D008970:Molecular Weight; D011485:Protein Binding; D017433:Protein Structure, Secondary; D011993:Recombinant Fusion Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D017384:Sequence Deletion / Q000235:genetics; D017386:Sequence Homology, Amino Acid; D020798:Two-Hybrid System Techniques; D014774:Virulence / Q000235:genetics; D015010:Yersinia pestis / Q000166:cytology / Q000378:metabolism* / Q000472:pathogenicity
chemical_list: D000942:Antigens, Bacterial; D001425:Bacterial Outer Membrane Proteins; D001426:Bacterial Proteins; D002352:Carrier Proteins; D008565:Membrane Proteins; D018832:Molecular Chaperones; D011993:Recombinant Fusion Proteins; C406203:YSCY protein, Yersinia enterocolitica; C063239:yopE protein, Yersinia; C070015:YopN protein, Yersinia