title: Characterization of the Arc two-component signal transduction system of the capnophilic rumen bacterium Mannheimia succiniciproducens.
abstract: The ArcB/A two-component signal transduction system of Escherichia coli modulates the expression of numerous operons in response to redox conditions of growth. We demonstrate that the putative arcA and arcB genes of Mannheimia succiniciproducens MBEL55E, a capnophilic (CO2-loving) rumen bacterium, encode functional proteins that specify a two-component system. The Arc proteins of the two bacterial species sufficiently resemble each other that they can participate in heterologous transphosphorylation in vitro, and the arcA and arcB genes of M. succiniciproducens confer toluidine blue resistance to E. coli arcA and arcB mutants. However, neither the quinone analogs (ubiquinone 0 and menadione) nor the cytosolic effectors (d-lactate, acetate, and pyruvate) affect the net phosphorylation of M. succiniciproducens ArcB. Our results indicate that different types of signaling molecules and distinct modes of kinase regulation are used by the ArcB proteins of E. coli and M. succiniciproducens.
authors.affiliation: Omics and Integration Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea.
authors.forename: Won Seok
authors.initials: WS
authors.lastname: Jung
authors.forename: Young Ryul
authors.initials: YR
authors.lastname: Jung
authors.forename: Doo-Byoung
authors.initials: DB
authors.lastname: Oh
authors.forename: Hyun Ah
authors.initials: HA
authors.lastname: Kang
authors.forename: Sang Yup
authors.initials: SY
authors.lastname: Lee
authors.forename: Maria
authors.initials: M
authors.lastname: Chavez-Canales
authors.forename: Dimitris
authors.initials: D
authors.lastname: Georgellis
authors.forename: Ohsuk
authors.initials: O
authors.lastname: Kwon
mesh_terms: D000595:Amino Acid Sequence; D000900:Anti-Bacterial Agents / Q000378:metabolism; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D004926:Escherichia coli / Q000235:genetics / Q000502:physiology; D005816:Genetic Complementation Test; D031121:Mannheimia / Q000235:genetics / Q000502:physiology*; D008969:Molecular Sequence Data; D010766:Phosphorylation; D011494:Protein Kinases / Q000235:genetics* / Q000378:metabolism*; D017386:Sequence Homology, Amino Acid; D015398:Signal Transduction; D014048:Tolonium Chloride / Q000378:metabolism; D015534:Trans-Activators / Q000235:genetics* / Q000378:metabolism*
chemical_list: D000900:Anti-Bacterial Agents; D001426:Bacterial Proteins; D015534:Trans-Activators; D014048:Tolonium Chloride; D011494:Protein Kinases