{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,12]],"date-time":"2025-11-12T06:12:58Z","timestamp":1762927978193},"reference-count":16,"publisher":"Canadian Science Publishing","issue":"2","license":[{"start":{"date-parts":[[2008,2,1]],"date-time":"2008-02-01T00:00:00Z","timestamp":1201824000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/www.nrcresearchpress.com\/page\/about\/CorporateTextAndDataMining"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Can. J. Microbiol."],"published-print":{"date-parts":[[2008,2]]},"abstract":"<jats:p>Chromobacterium violaceum ATCC 12472 presents an arsRCB-type operon, which is involved in arsenic resistance. The regulating protein of this resistance system (ArsR) does not have the small conserved site (ELCVDCL) to link to the metalloid, as observed in Escherichia coli , and is thus considered to be an atypical ArsR protein, like that observed in Acidithiobacillus ferrooxidans . In the present study, the gene expression profile of the ars operon under induction at different concentrations of arsenite\u00a0\u2014 As(III)\u00a0\u2014 was obtained via real-time PCR (TaqMan), by correlating the threshold cycle (C<jats:sub>t<\/jats:sub>) values of induced and uninduced (control) samples. Through linear regression analysis (R<jats:sup>2<\/jats:sup>= 0.9926), the gene expression profile of the ars operon showed clearly that the 0.125\u00a0\u03bcmol\/L concentration of As(III) was sufficient to provoke a 4-fold increase in the resistance system, and a further increase in concentration resulted in an increase of up to 53-fold in transcription rates. The relation between resistance and induction of the ars operon indicates that the increased resistance to As(III) is associated with the increase in the number of transcripts.<\/jats:p>","DOI":"10.1139\/w07-123","type":"journal-article","created":{"date-parts":[[2008,4,3]],"date-time":"2008-04-03T19:17:37Z","timestamp":1207250257000},"page":"137-142","source":"Crossref","is-referenced-by-count":7,"title":["Gene expression of the arsenic resistance operon in<i>Chromobacterium violaceum<\/i>ATCC 12472"],"prefix":"10.1139","volume":"54","author":[{"given":"Juliana Sim\u00e3o Nina de","family":"Azevedo","sequence":"first","affiliation":[{"name":"Departamento de Gen\u00e9tica, Laborat\u00f3rio de Polimorfismo de DNA, Universidade Federal do Par\u00e1, Campus Universit\u00e1rio do Guam\u00e1, Rua Augusto Correa 01, 66075-970 Bel\u00e9m - PA, Brazil."},{"name":"Requimte - Departamento de Qu\u00edmica, Centro de Qu\u00edmica Fina e Biotecnologia, Faculdade de Ci\u00eancias e Tecnologia, Universidade Nova de Lisboa, 2825-114 Monte de Caparica, Portugal."}]},{"given":"Rafael","family":"Silva-Rocha","sequence":"additional","affiliation":[{"name":"Departamento de Gen\u00e9tica, Laborat\u00f3rio de Polimorfismo de DNA, Universidade Federal do Par\u00e1, Campus Universit\u00e1rio do Guam\u00e1, Rua Augusto Correa 01, 66075-970 Bel\u00e9m - PA, Brazil."},{"name":"Requimte - Departamento de Qu\u00edmica, Centro de Qu\u00edmica Fina e Biotecnologia, Faculdade de Ci\u00eancias e Tecnologia, Universidade Nova de Lisboa, 2825-114 Monte de Caparica, Portugal."}]},{"given":"Artur","family":"Silva","sequence":"additional","affiliation":[{"name":"Departamento de Gen\u00e9tica, Laborat\u00f3rio de Polimorfismo de DNA, Universidade Federal do Par\u00e1, Campus Universit\u00e1rio do Guam\u00e1, Rua Augusto Correa 01, 66075-970 Bel\u00e9m - PA, Brazil."},{"name":"Requimte - Departamento de Qu\u00edmica, Centro de Qu\u00edmica Fina e Biotecnologia, Faculdade de Ci\u00eancias e Tecnologia, Universidade Nova de Lisboa, 2825-114 Monte de Caparica, Portugal."}]},{"given":"Marta Sofia","family":"Peixe Carepo","sequence":"additional","affiliation":[{"name":"Departamento de Gen\u00e9tica, Laborat\u00f3rio de Polimorfismo de DNA, Universidade Federal do Par\u00e1, Campus Universit\u00e1rio do Guam\u00e1, Rua Augusto Correa 01, 66075-970 Bel\u00e9m - PA, Brazil."},{"name":"Requimte - Departamento de Qu\u00edmica, Centro de Qu\u00edmica Fina e Biotecnologia, Faculdade de Ci\u00eancias e Tecnologia, Universidade Nova de Lisboa, 2825-114 Monte de Caparica, Portugal."}]},{"given":"Maria Paula","family":"Cruz Schneider","sequence":"additional","affiliation":[{"name":"Departamento de Gen\u00e9tica, Laborat\u00f3rio de Polimorfismo de DNA, Universidade Federal do Par\u00e1, Campus Universit\u00e1rio do Guam\u00e1, Rua Augusto Correa 01, 66075-970 Bel\u00e9m - PA, Brazil."},{"name":"Requimte - Departamento de Qu\u00edmica, Centro de Qu\u00edmica Fina e Biotecnologia, Faculdade de Ci\u00eancias e Tecnologia, Universidade Nova de Lisboa, 2825-114 Monte de Caparica, Portugal."}]}],"member":"155","reference":[{"key":"atypb1\/ref1","doi-asserted-by":"publisher","DOI":"10.1016\/S0891-5849(99)00175-6"},{"key":"atypb2\/ref2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.1832124100"},{"key":"atypb3\/ref3","doi-asserted-by":"crossref","first-page":"3983","DOI":"10.1099\/00221287-148-12-3983","volume":"148","author":"Butcher B.G.","year":"2002","journal-title":"Microbiology"},{"key":"atypb4\/ref4","doi-asserted-by":"crossref","first-page":"2705","DOI":"10.1099\/00221287-144-10-2705","volume":"144","author":"Cai J.","year":"1998","journal-title":"Microbiology"},{"key":"atypb5\/ref5","first-page":"181","volume":"3","author":"Carepo M.S.P.","year":"2004","journal-title":"Genet. 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