Catabolism of 4-alkylphenols by Acinetobacter sp. OP5: Genetic organization of the oph gene cluster and characterization of alkylcatechol 2, 3-dioxygenase

Nguyen Ngoc Tuan, Yi Wen Lin, Shir Ly Huang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

In this study, a specific PCR primer set was successfully designed for alkylcatechol 2, 3-dioxygenase genes and applied to detect the presence of this biomarker in 4-t-octylphenol-degrading Acinetobacter sp. strain OP5. A gene cluster (ophRBA1A2A3A4A5A6CEH) encoding multicomponent phenol hydroxylase and alkylcatechol 2, 3-dioxygenase was then cloned from this strain and showed the highest homology to those involved in the published medium-chain alkylphenol gene clusters. The pure enzyme of recombinant cell harboring ophB showed meta-cleavage activities for 4-methylcatechol (1,435%), 4-ethylcatechol (982%), catechol (100%), 4-t-butylcatechol (16.6%), and 4-t-octylcatechol (3.2%). The results suggest that the developed molecular technique is useful and easy in detection of medium/long-chain alkylphenol degradation gene cluster. In addition, it also provides a better understanding of the distribution of biodegradative genes and pathway for estrogenic-active long-chain alkylphenols in bacteria.

Original languageEnglish
Pages (from-to)420-428
Number of pages9
JournalBioresource Technology
Volume131
DOIs
StatePublished - Mar 2013

Keywords

  • Alkylcatechol 2, 3-dioxygenase
  • Alkylphenol
  • Phenol hydroxygenase

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