RRC ID 29256
Author Nakajima T, Hayashi K, Nagatomi R, Matsubara K, Moore JE, Millar BC, Matsuda M.
Title Molecular identification of an arsenic four-gene operon in Campylobacter lari.
Journal Folia Microbiol. (Praha)
Abstract An arsenic (ars) four-gene operon, containing genes encoding a putative membrane permease (ArsP), a transcriptional repressor (ArsR), an arsenate reductase (ArsC) and an arsenical-resistance membrane transporter (Acr3) was first identified in urease-positive thermophilic Campylobacter (UPTC) isolate, CF89-12. UPTC CF89-12 and some other Campylobacter lari isolates contained their ars four-genes, similarly, differing from that in the reference C. lari RM2100 strain. Two putative promoters and a putative terminator were identified for the operon in UPTC CF89-12. In vivo transcription of the operon was confirmed in the UPTC cells. PCR experiments using two primer pairs designed in silico to amplify two arsR and arsC-acr3 segments, respectively, generated two amplicons, approximately 200 and 350 base pairs, with all 31 of 31 and 19 of 31 C. lari isolates (n = 17 for UPTC; n = 14 for UN C. lari), respectively. An inverted repeat forming a dyad structure, a potential binding site for a transcriptional repressor, was identified in the promoter region. Within the deduced 61 amino acids sequence of the putative arsR open reading frame from the UPTC CF89-12, a metal binding box and a DNA-binding helix-turn-helix motif were identified. The UPTC CF89-12 and some other UPTC isolates isolated from natural environment were resistant to arsenate.
Volume 58(3)
Pages 253-60
Published 2013-5
DOI 10.1007/s12223-012-0207-5
PMID 23132657
MeSH Amino Acid Sequence Arsenate Reductases / genetics Arsenic* Campylobacter lari / genetics* Campylobacter lari / isolation & purification DNA Primers DNA, Bacterial / genetics Genes, Bacterial* Genetic Loci Helix-Turn-Helix Motifs / genetics Molecular Sequence Data Nucleic Acid Conformation Open Reading Frames Operon / genetics* RNA, Bacterial / genetics Reverse Transcriptase Polymerase Chain Reaction Sequence Alignment Sequence Analysis, DNA Urease / genetics
IF 1.448
Times Cited 5
General Microbes JCM 2013 JCM2530