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.

• MeSH
• arsen * MeSH
• arsenátreduktasy genetika   MeSH
• bakteriální geny * MeSH
• bakteriální RNA genetika   MeSH
• Campylobacter lari genetika   izolace a purifikace   MeSH
• DNA bakterií genetika   MeSH
• DNA primery MeSH
• genetické lokusy MeSH
• konformace nukleové kyseliny MeSH
• molekulární sekvence - údaje MeSH
• motiv helix-turn-helix genetika   MeSH
• operon genetika   MeSH
• otevřené čtecí rámce MeSH
• polymerázová řetězová reakce s reverzní transkripcí MeSH
• sekvence aminokyselin MeSH
• sekvenční analýza DNA MeSH
• sekvenční seřazení MeSH
• ureasa genetika   MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH