Title |
Comparative genomic analysis of selenium utilization traits in different marine environments |
Author |
Muhammad Farukh |
Address |
Department of Biotechnology, School of Life Science and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan, 430074, P. R. China, Key Laboratory of Molecular Biophysics, Ministry of Education, Wuhan, Hubei, P. R. China |
Bibliography |
Journal of Microbiology, 58(2),113-122, 2020,
|
DOI |
10.1007/s12275-020-9250-0
|
Key Words |
selenium utilization traits, Tara Oceans, metagenome,
marine, Sec, SeU, Se-cofactor, SelD |
Abstract |
Selenium (Se) is an essential trace element for many organisms,
which is required in the biosynthesis of proteins with
selenocysteine, tRNAs with selenouridine, and certain enzymes
with Se as a cofactor. Recent large-scale metagenomics
projects provide a unique opportunity for studying the global
trends of Se utilization in marine environments. Here,
we analyzed samples from different marine microbial communities,
revealed by the Tara Oceans project, to characterize
the Se utilization traits. We found that the selenophosphate
synthetase gene, which defines the overall Se utilization, and
Se utilization traits are present in all samples. Regions with
samples rich and poor in Se utilization traits were categorized.
From the analysis of environmental factors, the mesopelagic
zone and high temperature (> 15°C) of water are favorable,
while geographical location has little influence on
Se utilization. All Se utilization traits showed a relatively independent
occurrence. The taxonomic classification of Se
traits shows that most of the sequences corresponding to Se
utilization traits belong to the phylum Proteobacteria. Overall,
our study provides useful insights into the general features of
Se utilization in ocean samples and may help to understand
the evolutionary dynamics of Se utilization in different marine
environments. |