title: Sequence diversity of a gene encoding a putative primary sigma factor among Borrelia burgdorferi sensu lato strains.
abstract: Twenty-six strains of Borrelia burgdorferi sensu lato were subjected to polymerase chain reaction (PCR)-based restriction fragment length polymorphism (RFLP) analysis for assessing the sequence divergence of rpoD gene encoding the primary sigma factor. Four and five RFLP patterns were observed from two fragments of rpoD gene. Sequence analysis of a subgenic fragment covering region 1 through 4 from 13 strains of Borrelia burgdorferi s. 1. revealed that 21 of 450 deduced amino acid residues were diverged. These results indicate that the sequence heterogeneity of rpoD is present in different strains of Borrelia burgdorferi s. 1., and agreed well with the current classification of genospecies.
authors.affiliation: Graduate Institute of Veterinary Medicine, National Taiwan University, Taipei. vmipan@ccms.ntu.edu.tw
authors.forename: M J
authors.initials: MJ
authors.lastname: Pan
authors.forename: C P
authors.initials: CP
authors.lastname: Tsai
authors.forename: J C
authors.initials: JC
authors.lastname: Yeh
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000235:genetics*; D001483:Base Sequence; D015748:Borrelia burgdorferi Group / Q000235:genetics*; D012321:DNA-Directed RNA Polymerases / Q000235:genetics*; D008969:Molecular Sequence Data; D012150:Polymorphism, Restriction Fragment Length; D012808:Sigma Factor / Q000235:genetics*
chemical_list: D001426:Bacterial Proteins; D012808:Sigma Factor; C081775:RNA polymerase sigma 70; D012321:DNA-Directed RNA Polymerases