title: Cloning and characterization of the Actinobacillus actinomycetemcomitans gene encoding a heat-shock protein 90 homologue.
abstract: In a search for clones from a lambda gt11 expression library of Actinobacillus actinomycetemcomitans (Aa) genomic DNA that expressed epitopes from a 70-kDa iron-repressible membrane protein, we inadvertently identified clones that encoded a member of the 90-kDa heat-shock protein (HSP 90) family. The gene appears to encode a homologue of HtpG, as the nucleotide sequence has approximately 70% identity with the Escherichia coli (Ec) and Vibrio fischeri htpG. Growth of an Aa htpG insertion mutant at 42 degrees C was reduced to 50% of the parent strain, similar to an Ec htpG deletion mutant. These data suggest that Aa HtpG performs a function similar to Ec HtpG.
authors.affiliation: Department of Oral Biology, School of Dental Medicine, State University of New York at Buffalo, 14214, USA.
authors.forename: J L
authors.initials: JL
authors.lastname: Winston
authors.forename: S I
authors.initials: SI
authors.lastname: Toth
authors.forename: B A
authors.initials: BA
authors.lastname: Roe
authors.forename: D W
authors.initials: DW
authors.lastname: Dyer
mesh_terms: D016976:Aggregatibacter actinomycetemcomitans / Q000235:genetics*; D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000235:genetics*; D001483:Base Sequence; D003001:Cloning, Molecular; D004269:DNA, Bacterial; D029968:Escherichia coli Proteins; D018841:HSP90 Heat-Shock Proteins / Q000235:genetics*; D008969:Molecular Sequence Data; D016254:Mutagenesis, Insertional; D010641:Phenotype; D015183:Restriction Mapping; D017384:Sequence Deletion; D017386:Sequence Homology, Amino Acid
chemical_list: D001426:Bacterial Proteins; D004269:DNA, Bacterial; D029968:Escherichia coli Proteins; D018841:HSP90 Heat-Shock Proteins; C489352:HtpG protein, E coli; C066720:HtpG protein, bacteria