title: Biotransformation of arsenite and bacterial aox activity in drinking water produced from surface water of floating houses: Arsenic contamination in Cambodia.
abstract: The potential arsenite bioteansformation activity of arsenic was investigated by examining bacterial arsenic arsenite-oxidizing gene such as aoxS, aoxR, aoxA, aoxB, aoxC, and aoxD in high arsenic-contaminated drinking water produced from the surface water of floating houses. There is a biogeochemical cycle of activity involving arsenite oxidase aox system and the ars (arsenic resistance system) gene operon and aoxR leader gene activity in Alcaligenes faecalis SRR-11 and aoxS leader gene activity in Achromobacter xylosoxidans TSL-66. Batch experiments showed that SRR-11 and TSL-66 completely oxidized 1 mM of As (III) to As (V) within 35-40 h. The leaders of aoxS and aoxR are important for gene activity, and their effects in arsenic bioremediation and mobility in natural water has a significant ecological role because it allows arsenite oxidase in bacteria to control the biogeochemical cycle of arsenic-contaminated drinking water produced from surface water of floating houses.
authors.affiliation: Molecular Biogeochemistry Laboratory, Biological & Genetic Resources Institute (BGRI), 505 Inno-Biz Park, 1646 Yuseong-daero, Yeseong-gu, Daejeon 305-811, Republic of Korea. Electronic address: jinsoosu@daum.net.
authors.forename: Jin-Soo
authors.initials: JS
authors.lastname: Chang
mesh_terms: D001151:Arsenic / Q000032:analysis / Q000378:metabolism; D018053:Arsenites / Q000032:analysis / Q000378:metabolism*; D001419:Bacteria / Q000235:genetics / Q000378:metabolism*; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D001711:Biotransformation; D002160:Cambodia; D060766:Drinking Water / Q000032:analysis* / Q000382:microbiology; D006798:Housing; D010084:Oxidation-Reduction; D010088:Oxidoreductases / Q000235:genetics / Q000378:metabolism
chemical_list: D018053:Arsenites; D001426:Bacterial Proteins; D060766:Drinking Water; D010088:Oxidoreductases; C078179:arsenite oxidase; C015001:arsenite; D001151:Arsenic
keywords: Arsenite oxidase; Bioteansformation; Drinking water; Floating-house; Surface water