{"id":{"repo_id":"texas","oai_identifier":"oai:repositories.lib.utexas.edu:2152/86831"},"canonical_url":"https://search.dev.ndltd.org/etd/texas/oai:repositories.lib.utexas.edu:2152/86831","repository":{"repo_id":"texas","name":"University of Texas","base_url":"https://repositories.lib.utexas.edu/server/oai/request"},"display":{"title":"Expansion of Deltaproteobacteria diversity from marine sediment reveals unique metabolic features","abstract":"Deltaproteobacteria are a ubiquitous class of bacteria that play a substantial role in carbon and nutrient cycling. However, our understanding of Deltaproteobacteria is biased towards cultured exemplars. To better understand the biodiversity and ecology of the Deltaproteobacteria, we obtained hundreds of unique, uncultured metagenome-assembled genomes (MAGs) from a variety of coastal and deep-sea sediments. These 402 Deltaproteobacteria MAGs represent a 28% increase in Deltaproteobacteria genomes. Phylogenomic analyses revealed 12 novel lineages which consist entirely of uncultured representatives. Among these are two lineages that appear to represent a new order, which are capable of denitrification and dissimilatory nitrate reduction to ammonia (DNRA). Metabolic inference of Deltaproteobacteria MAGs reveals extensive versatility, central carbon metabolism, and a broad distribution of the Wood-Ljungdahl pathway for CO2 fixation. 54% of Deltaproteobacteria MAGs encode dissimilatory sulfite reductases (DsrAB), and for those with the ability to reduce sulfate, several dsr genes are related to those from thermophiles. This study expands the genetic catalog of Deltaproteobacteria and provides a better ecological context for Deltaproteobacteria worldwide. The description of these new lineages highlights that there is much to be learned about this globally distributed proteobacteria","abstract_html":"Deltaproteobacteria are a ubiquitous class of bacteria that play a substantial role in carbon and nutrient cycling. However, our understanding of Deltaproteobacteria is biased towards cultured exemplars. To better understand the biodiversity and ecology of the Deltaproteobacteria, we obtained hundreds of unique, uncultured metagenome-assembled genomes (MAGs) from a variety of coastal and deep-sea sediments. These 402 Deltaproteobacteria MAGs represent a 28% increase in Deltaproteobacteria genomes. Phylogenomic analyses revealed 12 novel lineages which consist entirely of uncultured representatives. Among these are two lineages that appear to represent a new order, which are capable of denitrification and dissimilatory nitrate reduction to ammonia (DNRA). Metabolic inference of Deltaproteobacteria MAGs reveals extensive versatility, central carbon metabolism, and a broad distribution of the Wood-Ljungdahl pathway for CO2 fixation. 54% of Deltaproteobacteria MAGs encode dissimilatory sulfite reductases (DsrAB), and for those with the ability to reduce sulfate, several dsr genes are related to those from thermophiles. This study expands the genetic catalog of Deltaproteobacteria and provides a better ecological context for Deltaproteobacteria worldwide. The description of these new lineages highlights that there is much to be learned about this globally distributed proteobacteria","abstract_has_math":false,"creators":["Langwig, Marguerite Viola"],"institution":"The University of Texas at Austin","degree_name":"Master of Science in Marine Science","degree_level":"Masters","degree_discipline":"Marine Science","degree_department":null,"school":null,"contributors":[],"advisors":["Baker, Brett J."],"committee_chairs":[],"committee_members":[],"year":2019,"date_issued":"2019-12-05","date_published":"2019-12-05","updated_at":"2026-07-24T05:01:18Z","subjects":["Deltaproteobacteria","Metagenome-assembled genomes","MAGs","Marine sediments"],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://dx.doi.org/10.26153/tsw/13782"],"render_values":[{"text":"http://dx.doi.org/10.26153/tsw/13782","href":"http://dx.doi.org/10.26153/tsw/13782","code":true}]}]},"links":{"outbound_url":"https://hdl.handle.net/2152/86831","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Baker, Brett J."]},{"key":"dc:creator","label":"Author","values":["Langwig, Marguerite Viola"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2021-07-14T20:24:41Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2021-07-14T20:24:41Z"]},{"key":"dc:date.issued","label":"Date","values":["2019-12-05"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Marine Science"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science in Marine Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["The University of Texas at Austin"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Deltaproteobacteria","Metagenome-assembled genomes","MAGs","Marine sediments"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/2152/86831","http://dx.doi.org/10.26153/tsw/13782"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Deltaproteobacteria are a ubiquitous class of bacteria that play a substantial role in carbon and nutrient cycling. 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Metabolic inference of Deltaproteobacteria MAGs reveals extensive versatility, central carbon metabolism, and a broad distribution of the Wood-Ljungdahl pathway for CO2 fixation. 54% of Deltaproteobacteria MAGs encode dissimilatory sulfite reductases (DsrAB), and for those with the ability to reduce sulfate, several dsr genes are related to those from thermophiles. This study expands the genetic catalog of Deltaproteobacteria and provides a better ecological context for Deltaproteobacteria worldwide. The description of these new lineages highlights that there is much to be learned about this globally distributed proteobacteria"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Expansion of Deltaproteobacteria diversity from marine sediment reveals unique metabolic features"]}]}],"canonical_facts":{"dc:contributor.advisor":["Baker, Brett J."],"dc:creator":["Langwig, Marguerite Viola"],"dc:date.accessioned":["2021-07-14T20:24:41Z"],"dc:date.available":["2021-07-14T20:24:41Z"],"dc:date.issued":["2019-12-05"],"dc:description.abstract":["Deltaproteobacteria are a ubiquitous class of bacteria that play a substantial role in carbon and nutrient cycling. However, our understanding of Deltaproteobacteria is biased towards cultured exemplars. 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This study expands the genetic catalog of Deltaproteobacteria and provides a better ecological context for Deltaproteobacteria worldwide. The description of these new lineages highlights that there is much to be learned about this globally distributed proteobacteria"],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["https://hdl.handle.net/2152/86831","http://dx.doi.org/10.26153/tsw/13782"],"dc:language.iso":["en"],"dc:subject":["Deltaproteobacteria","Metagenome-assembled genomes","MAGs","Marine sediments"],"dc:title":["Expansion of Deltaproteobacteria diversity from marine sediment reveals unique metabolic features"],"dc:type":["Thesis"],"thesis:degree_discipline":["Marine Science"],"thesis:degree_level":["Masters"],"thesis:degree_name":["Master of Science in Marine Science"],"thesis:institution_name":["The University of Texas at Austin"]},"updated_at":"2026-07-24T05:01:18Z"}