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dc.contributor.authorSteinke, Laurey
dc.contributor.authorSlysz, Gordon
dc.contributor.authorLipton, Mary S.
dc.contributor.authorKlatt, Christian
dc.contributor.authorMoran, James J.
dc.contributor.authorRomine, Margie F.
dc.contributor.authorWood, Jason M.
dc.contributor.authorAnderson, Gordon
dc.contributor.authorBryant, Donald A.
dc.contributor.authorWard, David M.
dc.identifier.citationSteinke, Laurey, Gordon W. Slysz, Mary S. Lipton, Christian Klatt, James J. Moran, Margie F. Romine, Jason M. Wood, Gordon Anderson, Donald A. Bryant, and David M. Ward. “Short-Term Stable Isotope Probing of Proteins Reveals Taxa Incorporating Inorganic Carbon in a Hot Spring Microbial Mat.” Edited by Robert M. Kelly. Applied and Environmental Microbiology 86, no. 7 (March 18, 2020). doi:10.1128/aem.01829-19.en_US
dc.description.abstractThe upper green layer of the chlorophototrophic microbial mats associated with the alkaline siliceous hot springs of Yellowstone National Park consists of oxygenic cyanobacteria (Synechococcus spp.), anoxygenic Roseiflexus spp., and several other anoxygenic chlorophototrophs. Synechococcus spp. are believed to be the main fixers of inorganic carbon (Ci), but some evidence suggests that Roseiflexus spp. also contribute to inorganic carbon fixation during low-light, anoxic morning periods. Contributions of other phototrophic taxa have not been investigated. In order to follow the pathway of Ci incorporation into different taxa, mat samples were incubated with [13C]bicarbonate for 3 h during the early-morning, low-light anoxic period. Extracted proteins were treated with trypsin and analyzed by mass spectrometry, leading to peptide identifications and peptide isotopic profile signatures containing evidence of 13C label incorporation. A total of 25,483 peptides, corresponding to 7,221 proteins, were identified from spectral features and associated with mat taxa by comparison to metagenomic assembly sequences. A total of 1,417 peptides, derived from 720 proteins, were detectably labeled with 13C. Most 13C-labeled peptides were derived from proteins of Synechococcus spp. and Roseiflexus spp. Chaperones and proteins of carbohydrate metabolism were most abundantly labeled. Proteins involved in photosynthesis, Ci fixation, and N2 fixation were also labeled in Synechococcus spp. Importantly, most proteins of the 3-hydroxypropionate bi-cycle for Ci fixation in Roseiflexus spp. were labeled, establishing that members of this taxocene contribute to Ci fixation. Other taxa showed much lower [13C]bicarbonate incorporation.en_US
dc.titleShort-Term Stable Isotope Probing of Proteins Reveals Taxa Incorporating Inorganic Carbon in a Hot Spring Microbial Maten_US
mus.citation.journaltitleApplied and Environmental Microbiologyen_US
mus.relation.collegeCollege of Agricultureen_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentChemistry & Biochemistry.en_US
mus.relation.departmentLand Resources & Environmental Sciences.en_US
mus.relation.universityMontana State University - Bozemanen_US

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