A glimpse of microbial potential in metal metabolism in the Clarion-Clipperton Fracture Zone in the eastern Pacific Ocean based on metagenomic analysis.

Autor: Chu J; Key Laboratory of Marine Ecosystem Dynamics, Ministry of Natural Resources and Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; School of Public Health, Jilin University, Changchun, Jilin 130021, China., Ye Y; Key Laboratory of Marine Ecosystem Dynamics, Ministry of Natural Resources and Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China., Wu YH; Key Laboratory of Marine Ecosystem Dynamics, Ministry of Natural Resources and Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China. Electronic address: yuehongwu@sio.org.cn.
Jazyk: angličtina
Zdroj: Marine genomics [Mar Genomics] 2024 Nov 12; Vol. 79, pp. 101159. Date of Electronic Publication: 2024 Nov 12.
DOI: 10.1016/j.margen.2024.101159
Abstrakt: The polymetallic nodules distributed in the abyssal ocean floor are full of economic value, rich in manganese, iron, copper and rare-earth elements. Little is currently known about the diversity and the metabolic potential of microorganisms inhabiting the Clarion-Clipperton Fracture Zone (CCFZ) in eastern Pacific Ocean. In this study, the surface sediments (0-8 cm), which were divided into eight parts at 1 cm intervals were collected from the CCFZ. The microbial diversity and the metabolic potential of metal were examined by metagenomic sequencing and binning. The metal redox genes and metal transporter genes also showed a certain trend at different depths, the highest in the surface layer, about the same at 0-6 cm, and greater changes after >6 cm. 58 high- and medium metagenome-assembled genomes (MAGs) were recovered and assigned to 14 bacterial phyla and 1 archaeal phylum after dereplication. Alphaproteobacteria mainly carried out the oxidation of Fe/Mn and the reduction of Hg, Gammaproteobacteria mainly for the oxidation of Mn/Cu and the reduction of Cr/Hg and Methylomirabilota mainly for the oxidation of Mn and the reduction of As/Cr/Hg. Among the five Thermoproteota MAGs identified, only one had genes annotated for Mn oxidation, suggesting a limited but potentially significant role in this process at the bottom layer. By identifying the microbial diversity and the metabolic potential of metal in different depth, our study strengthens the understanding of metal metabolism in CCFZ and provides the foundation for further analyses of metal metabolism in such ecosystems.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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