Polycyclic Aromatic Hydrocarbon (PAH) Degradation Pathways of the Obligate Marine PAH Degrader Cycloclasticus sp. Strain P1

Applied and Environmental Microbiology
Wanpeng WangZongze Shao

Abstract

Bacteria play an important role in the removal of polycyclic aromatic hydrocarbons (PAHs) from polluted environments. In marine environments, Cycloclasticus is one of the most prevalent PAH-degrading bacterial genera. However, little is known regarding the degradation mechanisms for multiple PAHs by CycloclasticusCycloclasticus sp. strain P1 was isolated from deep-sea sediments and is known to degrade naphthalene, phenanthrene, pyrene, and other aromatic hydrocarbons. Here, six ring-hydroxylating dioxygenases (RHDs) were identified in the complete genome of Cycloclasticus sp. P1 and were confirmed to be involved in PAH degradation by enzymatic assays. Further, five gene clusters in its genome were identified to be responsible for PAH degradation. Degradation pathways for naphthalene, phenanthrene, and pyrene were elucidated in Cycloclasticus sp. P1 based on genomic and transcriptomic analysis and characterization of an interconnected metabolic network. The metabolic pathway overlaps in many steps in the degradation of pyrene, phenanthrene, and naphthalene, which were validated by the detection of metabolic intermediates in cultures. This study describes a pyrene degradation pathway for Cycloclasticus. Moreover, the study repres...Continue Reading

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Citations

Sep 11, 2020·International Journal of Microbiology·Guilherme Pinto CauduroVictor Hugo Valiati
Dec 21, 2018·Frontiers in Microbiology·Maqshoof AhmadSvein Ø Solberg
Mar 2, 2021·Frontiers in Bioengineering and Biotechnology·Sandhya MishraShaohua Chen
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Aug 10, 2021·Frontiers in Microbiology·Piyush PandeySatinder Kaur Brar
Sep 14, 2021·Applied Microbiology and Biotechnology·Luis Felipe Muriel-MillánLiliana Pardo-López

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