<?xml version="1.0" encoding="UTF-8"?> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:obo_purl="http://purl.obolibrary.org/obo/" xmlns:owl="http://www.w3.org/2002/07/owl#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:oboinowl_gen="http://www.geneontology.org/formats/oboInOwl#" xmlns:metadata_def="http://data.bioontology.org/metadata/def/" xmlns:metadata="http://data.bioontology.org/metadata/"> <owl:Class rdf:about="http://purl.obolibrary.org/obo/GO_0016987"> <rdfs:subClassOf rdf:resource="http://purl.obolibrary.org/obo/GO_0003700"/> <rdfs:subClassOf rdf:resource="http://purl.obolibrary.org/obo/GO_0140110"/> <rdfs:label>sigma factor activity</rdfs:label> <skos:notation>GO:0016987</skos:notation> <obo_purl:IAO_0000115>Sigma factors act as the promoter specificity subunit of eubacterial and plant plastid multisubunit RNA polymerases, whose core subunit composition is often described as alpha(2)-beta-beta-prime. Although sigma does not bind DNA on its own, when combined with the core to form the holoenzyme, the sigma factor binds specifically to promoter elements. The sigma subunit is released once elongation begins.</obo_purl:IAO_0000115> <oboinowl_gen:hasExactSynonym>DNA-dependent RNA polymerase promoter selection factor</oboinowl_gen:hasExactSynonym> <oboinowl_gen:hasExactSynonym>sigma transcription factor</oboinowl_gen:hasExactSynonym> <oboinowl_gen:hasExactSynonym>core DNA-dependent RNA polymerase binding promoter specificity activity</oboinowl_gen:hasExactSynonym> <oboinowl_gen:created_by>krc</oboinowl_gen:created_by> <oboinowl_gen:creation_date>2010-08-11T04:12:24Z</oboinowl_gen:creation_date> <oboinowl_gen:hasOBONamespace>molecular_function</oboinowl_gen:hasOBONamespace> <oboinowl_gen:id>GO:0016987</oboinowl_gen:id> <metadata_def:prefLabel>sigma factor activity</metadata_def:prefLabel> <oboinowl_gen:hasNarrowSynonym>bacterial sigma factor activity</oboinowl_gen:hasNarrowSynonym> <oboinowl_gen:hasNarrowSynonym>plastid sigma factor activity</oboinowl_gen:hasNarrowSynonym> <oboinowl_gen:hasNarrowSynonym>promoter selection factor activity</oboinowl_gen:hasNarrowSynonym> <metadata_def:mappingLoom>sigmafactoractivity</metadata_def:mappingLoom> <metadata_def:mappingSameURI rdf:resource="http://purl.obolibrary.org/obo/GO_0016987"/> <metadata:treeView rdf:resource="http://purl.obolibrary.org/obo/GO_2000142"/> <obo_purl:BFO_0000051 rdf:resource="http://purl.obolibrary.org/obo/GO_0001046"/> <obo_purl:BFO_0000051 rdf:resource="http://purl.obolibrary.org/obo/GO_0043175"/> <metadata:obo/part_of rdf:resource="http://purl.obolibrary.org/obo/GO_2000142"/> <oboinowl_gen:hasAlternativeId>GO:0000996</oboinowl_gen:hasAlternativeId> <oboinowl_gen:hasAlternativeId>GO:0001053</oboinowl_gen:hasAlternativeId> <obo_purl:IAO_0000233 rdf:datatype="http://www.w3.org/2001/XMLSchema#anyURI">https://github.com/geneontology/go-ontology/issues/14848</obo_purl:IAO_0000233> <obo_purl:IAO_0000233 rdf:datatype="http://www.w3.org/2001/XMLSchema#anyURI">https://github.com/geneontology/go-ontology/issues/15587</obo_purl:IAO_0000233> </owl:Class> <rdf:Description rdf:about="http://purl.obolibrary.org/obo/GO_0000996"> <obo_purl:IAO_0100001> <rdf:Description rdf:about="http://purl.obolibrary.org/obo/GO_0016987"> <metadata_def:mappingSameURI rdf:resource="http://purl.obolibrary.org/obo/GO_0016987"/> </rdf:Description> </obo_purl:IAO_0100001> </rdf:Description> <rdf:Description rdf:about="http://purl.obolibrary.org/obo/GO_0001053"> <obo_purl:IAO_0100001 rdf:resource="http://purl.obolibrary.org/obo/GO_0016987"/> </rdf:Description> </rdf:RDF>