title: Two additional components of the accessory sec system mediating export of the Streptococcus gordonii platelet-binding protein GspB.
abstract: The gspB-secY2A2 locus of Streptococcus gordonii strain M99 encodes the platelet-binding glycoprotein GspB, along with proteins that mediate its glycosylation and export. We have identified two additional components of the accessory Sec system (Asp4 and Asp5) encoded just downstream of gtfB in the gspB-secY2A2 locus. These proteins are required for GspB export and for normal levels of platelet binding by M99. Asp4 and Asp5 may be functional homologues of SecE and SecG, respectively.
authors.affiliation: Department of Medicine, Veterans Affairs Medical Center (111W), 4150 Clement Street, San Francisco, California 94121, USA.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Takamatsu
authors.forename: Barbara A
authors.initials: BA
authors.lastname: Bensing
authors.forename: Paul M
authors.initials: PM
authors.lastname: Sullam
mesh_terms: D000595:Amino Acid Sequence; D001422:Bacterial Adhesion; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D001483:Base Sequence; D001792:Blood Platelets / Q000382:microbiology*; D006031:Glycosylation; D008969:Molecular Sequence Data; D016366:Open Reading Frames / Q000235:genetics; D013291:Streptococcus / Q000235:genetics* / Q000378:metabolism*
chemical_list: D001426:Bacterial Proteins