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Cited by 734

The DOI matches its Crossref record; 57 of the 57 references it cites were found in a registry or an index.

Mercury Methylation by Novel Microorganisms from New Environments

Gilmour, Cynthia C., Podar, Mircea, Bullock, Allyson L., Graham, Andrew M., Brown, Steven D., Somenahally, Anil C., Johs, Alex, Hurt, Richard A., Bailey, Kathryn L., Elias, Dwayne A.·2013·Environmental Science & Technology
DOI 10.1021/es403075t
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Abstract

Microbial mercury (Hg) methylation transforms a toxic trace metal into the highly bioaccumulated neurotoxin methylmercury (MeHg). The lack of a genetic marker for microbial MeHg production has prevented a clear understanding of Hg-methylating organism distribution in nature. Recently, a specific gene cluster (hgcAB) was linked to Hg methylation in two bacteria.1 Here we test if the presence of hgcAB orthologues is a reliable predictor of Hg methylation capability in microorganisms, a necessary confirmation for the development of molecular probes for Hg-methylation in nature. Although hgcAB orthologues are rare among all available microbial genomes, organisms are much more phylogenetically and environmentally diverse than previously thought. By directly measuring MeHg production in several bacterial and archaeal strains encoding hgcAB, we confirmed that possessing hgcAB predicts Hg methylation capability. For the first time, we demonstrated Hg methylation in a number of species other than sulfate- (SRB) and iron- (FeRB) reducing bacteria, including methanogens, and syntrophic, acetogenic, and fermentative Firmicutes. Several of these species occupy novel environmental niches for Hg methylation, including methanogenic habitats such as rice paddies, the animal gut, and extremes of pH and salinity. Identification of these organisms as Hg methylators now links methylation to discrete gene markers in microbial communities.

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Metadata

Authors
Gilmour, C. C., Podar, M., Bullock, A. L., Graham, A. M., Brown, S. D., Somenahally, A. C., Johs, A., Hurt, R. A., Bailey, K. L., & Elias, D. A.
Venue
Environmental Science & Technology
Publisher
American Chemical Society (ACS)
Published
2013-09-26
Volume
47
Issue
20
Pages
11810-11820
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
DOI
10.1021/es403075t
OpenAlex
W2165751990
Cited by
734
References
57
FWCI
26.93
Type
journal article
Language
en
Open access
closed

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