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Title: Viral elements and their potential influence on microbial processes along the permanently stratified Cariaco Basin redoxcline

Abstract

Little is known about viruses in oxygen-deficient water columns (ODWCs). In surface ocean waters, viruses are known to act as gene vectors among susceptible hosts. Some of these genes may have metabolic functions and are thus termed auxiliary metabolic genes (AMGs). AMGs introduced to new hosts by viruses can enhance viral replication and/or potentially affect biogeochemical cycles by modulating key microbial pathways. Here we identify 748 viral populations that cluster into 94 genera along a vertical geochemical gradient in the Cariaco Basin, a permanently stratified and euxinic ocean basin. The viral communities in this ODWC appear to be relatively novel as 80 of these viral genera contained no reference viral sequences, likely due to the isolation and unique features of this system. We identify viral elements that encode AMGs implicated in distinctive processes, such as sulfur cycling, acetate fermentation, signal transduction, [Fe–S] formation, and N-glycosylation. These AMG-encoding viruses include two putative Mu-like viruses, and viral-like regions that may constitute degraded prophages that have been modified by transposable elements. Our results provide an insight into the ecological and biogeochemical impact of viruses oxygen-depleted and euxinic habitats.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4];  [5]; ORCiD logo [6];  [7]; ORCiD logo [1]
  1. Woods Hole Oceanographic Institution, Woods Hole, MA (United States). Geology and Geophysics Dept.
  2. The Ohio State Univ., Columbus, OH (United States). Dept. of Microbiology
  3. Woods Hole Oceanographic Institution, Woods Hole, MA (United States). Biology Dept.
  4. Molloy College, Rockville Centre, NY (United States). Biology, Chemistry, and Environmental Studies Dept.
  5. Univ. of Arizona, Tucson, AZ (United States). Dept. of Ecology and Evolutionary Biology
  6. Stony Brook Univ., NY (United States). School of Marine and Atmospheric Sciences
  7. The Ohio State Univ., Columbus, OH (United States). Dept. of Microbiology; The Ohio State Univ., Columbus, OH (United States). Dept. of Civil, Environmental and Geodetic Engineering
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF)
OSTI Identifier:
1817130
Grant/Contract Number:  
AC02-05CH11231; OCE-1336082; OCE-1335436; OCE-1536989; 3790
Resource Type:
Accepted Manuscript
Journal Name:
The ISME Journal
Additional Journal Information:
Journal Volume: 14; Journal Issue: 12; Journal ID: ISSN 1751-7362
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; metagenomics; microbial ecology

Citation Formats

Mara, Paraskevi, Vik, Dean, Pachiadaki, Maria G., Suter, Elizabeth A., Poulos, Bonnie, Taylor, Gordon T., Sullivan, Matthew B., and Edgcomb, Virginia P. Viral elements and their potential influence on microbial processes along the permanently stratified Cariaco Basin redoxcline. United States: N. p., 2020. Web. doi:10.1038/s41396-020-00739-3.
Mara, Paraskevi, Vik, Dean, Pachiadaki, Maria G., Suter, Elizabeth A., Poulos, Bonnie, Taylor, Gordon T., Sullivan, Matthew B., & Edgcomb, Virginia P. Viral elements and their potential influence on microbial processes along the permanently stratified Cariaco Basin redoxcline. United States. https://doi.org/10.1038/s41396-020-00739-3
Mara, Paraskevi, Vik, Dean, Pachiadaki, Maria G., Suter, Elizabeth A., Poulos, Bonnie, Taylor, Gordon T., Sullivan, Matthew B., and Edgcomb, Virginia P. Fri . "Viral elements and their potential influence on microbial processes along the permanently stratified Cariaco Basin redoxcline". United States. https://doi.org/10.1038/s41396-020-00739-3. https://www.osti.gov/servlets/purl/1817130.
@article{osti_1817130,
title = {Viral elements and their potential influence on microbial processes along the permanently stratified Cariaco Basin redoxcline},
author = {Mara, Paraskevi and Vik, Dean and Pachiadaki, Maria G. and Suter, Elizabeth A. and Poulos, Bonnie and Taylor, Gordon T. and Sullivan, Matthew B. and Edgcomb, Virginia P.},
abstractNote = {Little is known about viruses in oxygen-deficient water columns (ODWCs). In surface ocean waters, viruses are known to act as gene vectors among susceptible hosts. Some of these genes may have metabolic functions and are thus termed auxiliary metabolic genes (AMGs). AMGs introduced to new hosts by viruses can enhance viral replication and/or potentially affect biogeochemical cycles by modulating key microbial pathways. Here we identify 748 viral populations that cluster into 94 genera along a vertical geochemical gradient in the Cariaco Basin, a permanently stratified and euxinic ocean basin. The viral communities in this ODWC appear to be relatively novel as 80 of these viral genera contained no reference viral sequences, likely due to the isolation and unique features of this system. We identify viral elements that encode AMGs implicated in distinctive processes, such as sulfur cycling, acetate fermentation, signal transduction, [Fe–S] formation, and N-glycosylation. These AMG-encoding viruses include two putative Mu-like viruses, and viral-like regions that may constitute degraded prophages that have been modified by transposable elements. Our results provide an insight into the ecological and biogeochemical impact of viruses oxygen-depleted and euxinic habitats.},
doi = {10.1038/s41396-020-00739-3},
journal = {The ISME Journal},
number = 12,
volume = 14,
place = {United States},
year = {Fri Aug 14 00:00:00 EDT 2020},
month = {Fri Aug 14 00:00:00 EDT 2020}
}

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