LurR is a regulator of the central lactate oxidation pathway in sulfate-reducing Desulfovibrio species
Abstract
The central carbon/lactate utilization pathway in the model sulfate-reducing bacterium, Desulfovibrio vulgaris Hildenborough, is encoded by the highly conserved operon DVU3025-3033. Our earlier in vitro genome-wide study had suggested a network of four two-component system regulators that target this large operon; however, how these four regulators control this operon was not known. Here, we probe the regulation of the lactate utilization operon with mutant strains and DNA-protein binding assays. We show that the LurR response regulator is required for optimal growth and complete lactate utilization, and that it activates the DVU3025-3033 lactate oxidation operon as well as DVU2451, a lactate permease gene, in the presence of lactate. We show by electrophoretic mobility shift assays that LurR binds to three sites in the upstream region of DVU3025, the first gene of the operon. NrfR, a response regulator that is activated under nitrite stress, and LurR share similar binding site motifs and bind the same sites upstream of DVU3025. The DVU3025 promoter also has a binding site motif (Pho box) that is bound by PhoB, a two-component response regulator activated under phosphate limitation. The lactate utilization operon, the regulator LurR, and LurR binding sites are conserved across the order Desulfovibrionales whereas possiblemore »
- Authors:
-
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Univ. of Missouri, Columbia, MO (United States)
- LSU Health Sciences Center School of Dentistry, New Orleans, LA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1545315
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- PLoS ONE
- Additional Journal Information:
- Journal Volume: 14; Journal Issue: 4; Journal ID: ISSN 1932-6203
- Publisher:
- Public Library of Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES
Citation Formats
Rajeev, Lara, Luning, Eric G., Zane, Grant M., Juba, Thomas R., Kazakov, Alexey E., Novichkov, Pavel S., Wall, Judy D., Mukhopadhyay, Aindrila, and Wen, Z. Tom. LurR is a regulator of the central lactate oxidation pathway in sulfate-reducing Desulfovibrio species. United States: N. p., 2019.
Web. doi:10.1371/journal.pone.0214960.
Rajeev, Lara, Luning, Eric G., Zane, Grant M., Juba, Thomas R., Kazakov, Alexey E., Novichkov, Pavel S., Wall, Judy D., Mukhopadhyay, Aindrila, & Wen, Z. Tom. LurR is a regulator of the central lactate oxidation pathway in sulfate-reducing Desulfovibrio species. United States. https://doi.org/10.1371/journal.pone.0214960
Rajeev, Lara, Luning, Eric G., Zane, Grant M., Juba, Thomas R., Kazakov, Alexey E., Novichkov, Pavel S., Wall, Judy D., Mukhopadhyay, Aindrila, and Wen, Z. Tom. Tue .
"LurR is a regulator of the central lactate oxidation pathway in sulfate-reducing Desulfovibrio species". United States. https://doi.org/10.1371/journal.pone.0214960. https://www.osti.gov/servlets/purl/1545315.
@article{osti_1545315,
title = {LurR is a regulator of the central lactate oxidation pathway in sulfate-reducing Desulfovibrio species},
author = {Rajeev, Lara and Luning, Eric G. and Zane, Grant M. and Juba, Thomas R. and Kazakov, Alexey E. and Novichkov, Pavel S. and Wall, Judy D. and Mukhopadhyay, Aindrila and Wen, Z. Tom},
abstractNote = {The central carbon/lactate utilization pathway in the model sulfate-reducing bacterium, Desulfovibrio vulgaris Hildenborough, is encoded by the highly conserved operon DVU3025-3033. Our earlier in vitro genome-wide study had suggested a network of four two-component system regulators that target this large operon; however, how these four regulators control this operon was not known. Here, we probe the regulation of the lactate utilization operon with mutant strains and DNA-protein binding assays. We show that the LurR response regulator is required for optimal growth and complete lactate utilization, and that it activates the DVU3025-3033 lactate oxidation operon as well as DVU2451, a lactate permease gene, in the presence of lactate. We show by electrophoretic mobility shift assays that LurR binds to three sites in the upstream region of DVU3025, the first gene of the operon. NrfR, a response regulator that is activated under nitrite stress, and LurR share similar binding site motifs and bind the same sites upstream of DVU3025. The DVU3025 promoter also has a binding site motif (Pho box) that is bound by PhoB, a two-component response regulator activated under phosphate limitation. The lactate utilization operon, the regulator LurR, and LurR binding sites are conserved across the order Desulfovibrionales whereas possible modulation of the lactate utilization genes by additional regulators such as NrfR and PhoB appears to be limited to D. vulgaris.},
doi = {10.1371/journal.pone.0214960},
journal = {PLoS ONE},
number = 4,
volume = 14,
place = {United States},
year = {Tue Apr 09 00:00:00 EDT 2019},
month = {Tue Apr 09 00:00:00 EDT 2019}
}
Web of Science
Figures / Tables:
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