{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,6]],"date-time":"2026-02-06T00:20:20Z","timestamp":1770337220517,"version":"3.49.0"},"reference-count":60,"publisher":"American Society for Microbiology","issue":"12","license":[{"start":{"date-parts":[[2008,6,15]],"date-time":"2008-06-15T00:00:00Z","timestamp":1213488000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["Appl Environ Microbiol"],"published-print":{"date-parts":[[2008,6,15]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n          <jats:p>\n            <jats:italic>Rhodococcus<\/jats:italic>\n            sp. strain HA01, isolated through its ability to utilize dibenzofuran (DBF) as the sole carbon and energy source, was also capable, albeit with low activity, of transforming dibenzo-\n            <jats:italic>p<\/jats:italic>\n            -dioxin (DD). This strain could also transform 3-chlorodibenzofuran (3CDBF), mainly by angular oxygenation at the ether bond-carrying carbon (the angular position) and an adjacent carbon atom, to 4-chlorosalicylate as the end product. Similarly, 2-chlorodibenzofuran (2CDBF) was transformed to 5-chlorosalicylate. However, lateral oxygenation at the 3,4-positions was also observed and yielded the novel product 2-chloro-3,4-dihydro-3,4-dihydroxydibenzofuran. Two gene clusters encoding enzymes for angular oxygenation (\n            <jats:italic>dfdA1A2A3A4<\/jats:italic>\n            and\n            <jats:italic>dbfA1A2<\/jats:italic>\n            ) were isolated, and expression of both was observed during growth on DBF. Heterologous expression revealed that both oxygenase systems catalyze angular oxygenation of DBF and DD but exhibited complementary substrate specificity with respect to CDBF transformation. While DfdA1A2A3A4 oxygenase, with high similarity to DfdA1A2A3A4 oxygenase from\n            <jats:italic>Terrabacter<\/jats:italic>\n            sp. strain YK3, transforms 3CDBF by angular dioxygenation at a rate of 29% \u00b1 4% that of DBF, 2CDBF was not transformed. In contrast, DbfA1A2 oxygenase, with high similarity to the DbfA1A2 oxygenase from\n            <jats:italic>Terrabacter<\/jats:italic>\n            sp. strain DBF63, exhibited complementary activity with angular oxygenase activity against 2CDBF but negligible activity against 3CDBF. Thus,\n            <jats:italic>Rhodococcus<\/jats:italic>\n            sp. strain HA01 constitutes the first described example of a bacterial strain where coexpression of two angular dioxygenases was observed. Such complementary activity allows for the efficient transformation of chlorinated DBFs.\n          <\/jats:p>","DOI":"10.1128\/aem.00226-08","type":"journal-article","created":{"date-parts":[[2008,4,26]],"date-time":"2008-04-26T01:09:00Z","timestamp":1209172140000},"page":"3812-3822","update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":31,"title":["Two Angular Dioxygenases Contribute to the Metabolic Versatility of Dibenzofuran-Degrading\n            <i>Rhodococcus<\/i>\n            sp. Strain HA01"],"prefix":"10.1128","volume":"74","author":[{"given":"Hamdy A. 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