##gff-version 3 P54870 UniProtKB Chain 1 455 . . . ID=PRO_0000213753;Note=Hydroxymethylglutaryl-CoA synthase 2 P54870 UniProtKB Active site 86 86 . . . Note=Proton donor/acceptor;Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU10116 P54870 UniProtKB Active site 120 120 . . . Note=Acyl-thioester intermediate;Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU10116 P54870 UniProtKB Active site 255 255 . . . Note=Proton donor/acceptor;Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU10116