title: Cellular Response of Sinorhizobium sp. Strain A2 during Arsenite Oxidation.
abstract: Arsenic (As) is a widely distributed toxic element in the environment and microorganisms have developed resistance mechanisms in order to tolerate it. The cellular response of the chemoorganotrophic arsenite (As[III])-oxidizing α-Proteobacteria, Sinorhizobium sp. strain A2, to arsenic was examined in the present study. Several proteins associated with arsenite oxidase and As resistance were shown to be accumulated in the presence of As(III). A shift in central carbon metabolism from the tricarboxylic acid pathway to glyoxylate pathway was also observed in response to oxidative stress. Our results revealed the strategy of the As(III)-oxidizing Sinorhizobium strain to mitigate arsenic toxicity and oxidative damage by multiple metabolic adaptations.
authors.affiliation: Center for Marine Environmental Studies, Ehime University.
authors.forename: Koh
authors.initials: K
authors.lastname: Fukushima
authors.forename: He
authors.initials: H
authors.lastname: Huang
authors.forename: Natsuko
authors.initials: N
authors.lastname: Hamamura
mesh_terms: D018053:Arsenites / Q000633:toxicity*; D002244:Carbon / Q000378:metabolism; D024881:Drug Resistance, Bacterial; D064688:Metabolic Flux Analysis; D053858:Metabolic Networks and Pathways; D010084:Oxidation-Reduction; D010088:Oxidoreductases / Q000378:metabolism; D020579:Sinorhizobium / Q000187:drug effects*; D013312:Stress, Physiological
chemical_list: D018053:Arsenites; D002244:Carbon; D010088:Oxidoreductases; C078179:arsenite oxidase; C015001:arsenite