##gff-version 3 P54839 UniProtKB Chain 1 491 . . . ID=PRO_0000213758;Note=Hydroxymethylglutaryl-CoA synthase P54839 UniProtKB Active site 127 127 . . . Note=Proton donor/acceptor;Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU10116 P54839 UniProtKB Active site 159 159 . . . Note=Acyl-thioester intermediate;Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU10116 P54839 UniProtKB Active site 296 296 . . . Note=Proton donor/acceptor;Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU10116 P54839 UniProtKB Modified residue 276 276 . . . Note=Phosphoserine;Ontology_term=ECO:0007744;evidence=ECO:0007744|PubMed:18407956;Dbxref=PMID:18407956