Evidence of microbial reductive dehalogenation in deep-sea cold seeps and its implications for biogeochemical cycles.

ABSTRACT:

Background

Reductive dehalogenation is crucial for halogen cycling and environmental remediation, yet its ecological role is not completely understood, especially in deep-sea environments. To address this gap, we investigated the diversity and expression of genes encoding reductive dehalogenase catalytic subunits (RdhAs), and ecophysiology of potential organohalide reducers in deep-sea cold seeps, which are environments rich in halogenated compounds.

Results

Through genome-resolved metagenomic analysis of 165 global cold seep sediment samples, 4 types of RdhA-like sequences were identified based on their features and phylogenetic relationships: prototypical respiratory, transmembrane respiratory, cytosolic, and a novel clade. Cold seeps were found to harbor a higher abundanc

SUBMITTER: Han Y 

PROVIDER: S-EPMC12219181 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature