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Homology of ars (arsenic-resistance system) genes was examined among the indigenous bacteria isolated from the soils and sediments of two abandoned Au mines, which are highly contaminated with arsenic. The DNA and amino acid sequence homology of the ars determinants were investigated using an ars genotype. The isolated strains showed As(III)-oxidation ability contained arsAB genes encoding the efflux pump as well as arsR and arsD regulator genes. The arsR and arsD leader gene are required for an arsenic resistance system when the high-homology genes (arsR; pI258 52.09% and arsD; Shewanell sp. 42.33%) are controlled by the ars inducer-independent regulatory amino acid sequence. These leader gene were observed under weak acidic conditions in the Myoung-bong (pH; 5.0 to 6.0) and Duck-um (pH; 4.0 to 7.0) mines. In addition, the strains with the ability of As(V)-reduction involved the arsC gene homologues, as in the strain OW-16 (Pseudomonas putida). The arsenic-resistance genes in the isolated indigenous bacteria showed varying degrees of amino acid similarity to the homologous genes found in the database (GenBank) such as P. putida KT2440: 39~53% for arsR, 22~42% for arsD, 16~84% for arsA, 26~45% for arsB, 17~44% for arsAB, 37~41% for arsC, and 14~47% for arsH. These findings suggested that the function of the various ars gene in indigenous bacteria existing in weakly oxidative conditions may be the key factor for redox mechanisms and biogeochemical systems in arsenic contaminated soils.
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참고문헌 (27건) : 자료제공( 네이버학술정보 )
| 번호 | 참고문헌 | 국회도서관 소장유무 |
|---|---|---|
| 1 | Ehrlich, H. L, (2002) Bacterial oxidation of As(III)compounds, Marcel Dekker | 미소장 |
| 2 | Chang, J. S, (2007) Isolationand ars detoxification of arsenite-oxidizing bacteriain abandoned arsenic-contaminated mines, | 미소장 |
| 3 | Chang, J. S, (2007) Identification and Characteristics ofIndigenous Bacteria in Arsenic-contaminated Soil Usingars Gene and 16S rDNA. MSc. Thesis. Gwangju Instituteof Science and Technology (GIST) Gwangju, | 미소장 |
| 4 | Silver, S. , (1996) Bacterial heavy metalresistance: new surprises, | 미소장 |
| 5 | Cai J, (1998) A chromosomalars operon homologue of Pseudomonas aeruginosaconfers increased resistance to arsenic and antimonyin Escherichia coli, | 미소장 |
| 6 | Bruhn D. F, (1996) The arsenical resistance operon of IncNplasmid R46, | 미소장 |
| 7 | Rosenstein, (1992) Expression and regulation of the antimonite and arsenate resistance operon of Staphylococcusxylosus plasmid pSX267, | 미소장 |
| 8 | Suzuki K, (1998) Expression and regulation of the arsenicresistance operon of Acidiphilium multivorum AIU301plasmid pKW301 in Escherichia coli, | 미소장 |
| 9 | Chen, (1986) Nucleotide sequence of the structural genes foran anion pump, | 미소장 |
| 10 | Neyt C, (1997) Virulence and arsenic resistance in Yersiniae, | 미소장 |
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| 12 | Saltikov, C. W. , (2002) Homology ofEscherichia coli R773 arsA, arsB, and arsC genes in arsenic-resistant bacteria isolated from raw sewage and arsenic-enrich creek waters, | 미소장 |
| 13 | Canovas, D, (2003) Heavymetal tolerance and metal homeostasis in Pseudomonasputida as revealed by complete genome analysis, | 미소장 |
| 14 | Lopez-Maury L, (2003) Arsenic sensing and resistance system in the Cyanobacteriumsynechocystic sp. strain PCC 6803, | 미소장 |
| 15 | Kim, J. D. , (2006) Characterization of twoalgal lytic bacteria associated with management of thecyanobacterium Anabaena flos-aquae, | 미소장 |
| 16 | Ahn J. M, (2006) Characterization of gltA::luxCDABE fusion in Escherichia coli as atoxicity biosensor, | 미소장 |
| 17 | Kim Y. B, (2006) Statistical optimization ofthe lysis agents for gram-negative bacteria cells in a microfluidicdevice, | 미소장 |
| 18 | Diorio C, (1995) An Escherichia coli chromosomal arsoperon homolog is functional in arsenic detoxificationand is conserved in gram-negative bacteria, | 미소장 |
| 19 | Chen, (1985) Separate resistances to arsenate and arsenite encoded by the arsenical resistance operon of Rfactor R773, | 미소장 |
| 20 | Stanier, (1966) The aerobic pseudomonas J Microbiol, | 미소장 |
| 21 | Sambrook, J. , (2001) Molecular Cloning:A Laboratory Manual. 3rd ed, Cold Spring HarborLaboratory Press | 미소장 |
| 22 | Gapped BLAST and PSI-BLAST: a new generation of protein database search programs.  |
미소장 |
| 23 | Nelson K. E, (2002) Completegenome sequence and comparative analysis of themetabolically versatile Pseudomonas putida KT2440, | 미소장 |
| 24 | Macur R. E, (2004) Bacterial populationsassociated with the oxidation and reduction of arsenicin an unsaturated soil, | 미소장 |
| 25 | Santini J. M, (2002) New arseniteoxidizingbacteria isolated from Australian gold miningenvironments ?phylogenetic relationships, | 미소장 |
| 26 | Mullen, (1989) Bacterialsorption of heavy metals, | 미소장 |
| 27 | vanden Hoven, R. N. , (2004) Arseniteoxidation by the heterotroph Hydrogenophaga sp. str.NT-14: the arsenite oxidase and its physiological electronacceptor, | 미소장 |
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