title: Isolation and characterization of the Vibrio cholerae acfA gene, required for efficient intestinal colonization.
abstract: The nucleotide sequence of the Vibrio cholerae acfA gene (encoding an accessory colonization factor) has been determined. Sequence analysis revealed the presence of an open reading frame of 215 amino acids with a characteristic signal peptidase I (SPI) cleavage site at the N terminus. Electrophoretic analysis of proteins synthesized by Escherichia coli cells, following T7 promoter/RNA polymerase-directed expression of acfA, revealed a 23-kDa protein corresponding to the mature form of AcfA. The T7 expression system also showed that, in the presence of known SPI inhibitors, a 25-kDa unprocessed form of AcfA is produced.
authors.affiliation: Department of Microbiology and Immunology, Louisiana State University Medical Center-Shreveport 71130, USA.
authors.forename: K J
authors.initials: KJ
authors.lastname: Hughes
authors.forename: K D
authors.initials: KD
authors.lastname: Everiss
authors.forename: M E
authors.initials: ME
authors.lastname: Kovach
authors.forename: K M
authors.initials: KM
authors.lastname: Peterson
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics*; D001483:Base Sequence; D003001:Cloning, Molecular; D010450:Endopeptidases / Q000378:metabolism; D004926:Escherichia coli / Q000235:genetics; D015870:Gene Expression; D005798:Genes, Bacterial / Q000235:genetics*; D007422:Intestines / Q000382:microbiology; D008565:Membrane Proteins; D008969:Molecular Sequence Data; D008970:Molecular Weight; D011499:Protein Processing, Post-Translational; D021382:Protein Sorting Signals / Q000235:genetics / Q000378:metabolism; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D012697:Serine Endopeptidases; D014734:Vibrio cholerae / Q000235:genetics* / Q000472:pathogenicity
chemical_list: C093353:AcfA protein, Vibrio cholerae; D001426:Bacterial Proteins; D008565:Membrane Proteins; D021382:Protein Sorting Signals; D011993:Recombinant Fusion Proteins; D010450:Endopeptidases; D012697:Serine Endopeptidases; C026515:type I signal peptidase