Metagenomic Insights Into the Cycling of Dimethylsulfoniopropionate and Related Molecules in the Eastern China Marginal Seas

Frontiers in Microbiology
Delei SongXiao-Hua Zhang

Abstract

The microbial cycling of dimethylsulfoniopropionate (DMSP) and its gaseous catabolites dimethylsulfide (DMS) and methanethiol (MeSH) are important processes in the global sulfur cycle, marine microbial food webs, signaling pathways, atmospheric chemistry, and potentially climate regulation. Many functional genes have been identified and used to study the genetic potential of microbes to produce and catabolize these organosulfur compounds in different marine environments. Here, we sampled seawater, marine sediment and hydrothermal sediment, and polymetallic sulfide in the eastern Chinese marginal seas and analyzed their microbial communities for the genetic potential to cycle DMSP, DMS, and MeSH using metagenomics. DMSP was abundant in all sediment samples, but was fivefold less prominent in those from hydrothermal samples. Indeed, Yellow Sea (YS) sediment samples had DMSP concentrations two orders of magnitude higher than in surface water samples. Bacterial genetic potential to synthesize DMSP (mainly in Rhodobacteraceae bacteria) was far higher than for phytoplankton in all samples, but particularly in the sediment where no algal DMSP synthesis genes were detected. Thus, we propose bacteria as important DMSP producers in these...Continue Reading

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Citations

Feb 23, 2021·Computational and Structural Biotechnology Journal·Gwendolyn J Gregory, E Fidelma Boyd
Apr 4, 2021·Microorganisms·Ji LiuXiao-Hua Zhang

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Methods Mentioned

BETA
PCR
electrophoresis
environmental stress

Software Mentioned

MEGAN
CD
MetaBAT
MetaGeneMark
FastTree
Megahit
Hit
DIAMOND
HMMER
CheckM

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