skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Orenia metallireducens sp. nov. strain Z6, a Novel Metal-reducing [member of the Phylum] Firmicute from the Deep Subsurface

Abstract

A novel halophilic and metal-reducing bacterium, Orenia metallireducens strain Z6, was isolated from briny groundwater extracted from a 2.02 km-deep borehole in the Illinois Basin, IL. This organism shared 96% 16S rRNA gene similarity with Orenia marismortui but demonstrated physiological properties previously unknown for this genus. In addition to exhibiting a fermentative metabolism typical of the genus Orenia, strain Z6 reduces various metal oxides [Fe(III), Mn(IV), Co(III), and Cr(VI)], using H 2 as the electron donor. Strain Z6 actively reduced ferrihydrite over broad ranges of pH (6 to 9.6), salinity (0.4 to 3.5 M NaCl), and temperature (20 to 60°C). At pH 6.5, strain Z6 also reduced more crystalline iron oxides, such as lepidocrocite (γ-FeOOH), goethite (α-FeOOH), and hematite (α-Fe 2O 3). Analysis of X-ray absorption fine structure (XAFS) following Fe(III) reduction by strain Z6 revealed spectra from ferrous secondary mineral phases consistent with the precipitation of vivianite [Fe 3(PO 4) 2] and siderite (FeCO 3). The draft genome assembled for strain Z6 is 3.47 Mb in size and contains 3,269 protein-coding genes. Unlike the well-understood iron-reducing Shewanella and Geobacter species, this organism lacks the c-type cytochromes for typical Fe(III) reduction. Strain Z6 represents the first bacterial species in themore » genus Orenia (order Halanaerobiales) reported to reduce ferric iron minerals and other metal oxides. This microbe expands both the phylogenetic and physiological scopes of iron-reducing microorganisms known to inhabit the deep subsurface and suggests new mechanisms for microbial iron reduction. In conclusion, these distinctions from other Orenia spp. support the designation of strain Z6 as a new species, Orenia metallireducens sp. nov.« less

Authors:
 [1];  [1];  [2];  [3];  [2];  [2];  [2];  [1];  [4];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Univ. of Illinois, Urbana-Champaign, Urbana, IL (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
  3. (Bulgaria)
  4. (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23), Subsurface Biogeochemical Research; National Aeronautic and Space Administration (NASA)
OSTI Identifier:
1330336
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Applied and Environmental Microbiology
Additional Journal Information:
Journal Volume: 82; Journal Issue: 21; Journal ID: ISSN 0099-2240
Publisher:
American Society for Microbiology
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES

Citation Formats

Dong, Yiran, Sanford, Robert A., Boyanov, Maxim I., Bulgarian Academy of Sciences, Sofia, Kemner, Kenneth M., Flynn, Theodore M., O'Loughlin, Edward J., Chang, Yun-juan, Rutgers Univ., New Brunswick, NJ, Locke, Jr., Randall A., Weber, Joseph R., Egan, Sheila M., Mackie, Roderick I., Cann, Isaac, and Fouke, Bruce W.. Orenia metallireducens sp. nov. strain Z6, a Novel Metal-reducing [member of the Phylum] Firmicute from the Deep Subsurface. United States: N. p., 2016. Web. doi:10.1128/AEM.02382-16.
Dong, Yiran, Sanford, Robert A., Boyanov, Maxim I., Bulgarian Academy of Sciences, Sofia, Kemner, Kenneth M., Flynn, Theodore M., O'Loughlin, Edward J., Chang, Yun-juan, Rutgers Univ., New Brunswick, NJ, Locke, Jr., Randall A., Weber, Joseph R., Egan, Sheila M., Mackie, Roderick I., Cann, Isaac, & Fouke, Bruce W.. Orenia metallireducens sp. nov. strain Z6, a Novel Metal-reducing [member of the Phylum] Firmicute from the Deep Subsurface. United States. doi:10.1128/AEM.02382-16.
Dong, Yiran, Sanford, Robert A., Boyanov, Maxim I., Bulgarian Academy of Sciences, Sofia, Kemner, Kenneth M., Flynn, Theodore M., O'Loughlin, Edward J., Chang, Yun-juan, Rutgers Univ., New Brunswick, NJ, Locke, Jr., Randall A., Weber, Joseph R., Egan, Sheila M., Mackie, Roderick I., Cann, Isaac, and Fouke, Bruce W.. Fri . "Orenia metallireducens sp. nov. strain Z6, a Novel Metal-reducing [member of the Phylum] Firmicute from the Deep Subsurface". United States. doi:10.1128/AEM.02382-16. https://www.osti.gov/servlets/purl/1330336.
@article{osti_1330336,
title = {Orenia metallireducens sp. nov. strain Z6, a Novel Metal-reducing [member of the Phylum] Firmicute from the Deep Subsurface},
author = {Dong, Yiran and Sanford, Robert A. and Boyanov, Maxim I. and Bulgarian Academy of Sciences, Sofia and Kemner, Kenneth M. and Flynn, Theodore M. and O'Loughlin, Edward J. and Chang, Yun-juan and Rutgers Univ., New Brunswick, NJ and Locke, Jr., Randall A. and Weber, Joseph R. and Egan, Sheila M. and Mackie, Roderick I. and Cann, Isaac and Fouke, Bruce W.},
abstractNote = {A novel halophilic and metal-reducing bacterium, Orenia metallireducens strain Z6, was isolated from briny groundwater extracted from a 2.02 km-deep borehole in the Illinois Basin, IL. This organism shared 96% 16S rRNA gene similarity with Orenia marismortui but demonstrated physiological properties previously unknown for this genus. In addition to exhibiting a fermentative metabolism typical of the genus Orenia, strain Z6 reduces various metal oxides [Fe(III), Mn(IV), Co(III), and Cr(VI)], using H2 as the electron donor. Strain Z6 actively reduced ferrihydrite over broad ranges of pH (6 to 9.6), salinity (0.4 to 3.5 M NaCl), and temperature (20 to 60°C). At pH 6.5, strain Z6 also reduced more crystalline iron oxides, such as lepidocrocite (γ-FeOOH), goethite (α-FeOOH), and hematite (α-Fe2O3). Analysis of X-ray absorption fine structure (XAFS) following Fe(III) reduction by strain Z6 revealed spectra from ferrous secondary mineral phases consistent with the precipitation of vivianite [Fe3(PO4)2] and siderite (FeCO3). The draft genome assembled for strain Z6 is 3.47 Mb in size and contains 3,269 protein-coding genes. Unlike the well-understood iron-reducing Shewanella and Geobacter species, this organism lacks the c-type cytochromes for typical Fe(III) reduction. Strain Z6 represents the first bacterial species in the genus Orenia (order Halanaerobiales) reported to reduce ferric iron minerals and other metal oxides. This microbe expands both the phylogenetic and physiological scopes of iron-reducing microorganisms known to inhabit the deep subsurface and suggests new mechanisms for microbial iron reduction. In conclusion, these distinctions from other Orenia spp. support the designation of strain Z6 as a new species, Orenia metallireducens sp. nov.},
doi = {10.1128/AEM.02382-16},
journal = {Applied and Environmental Microbiology},
number = 21,
volume = 82,
place = {United States},
year = {Fri Aug 26 00:00:00 EDT 2016},
month = {Fri Aug 26 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

Save / Share: