##gff-version 3 A8M2A3 UniProtKB Propeptide 1 53 . . . ID=PRO_0000397574;Note=Removed in mature form%3B by autocatalysis;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_02113 A8M2A3 UniProtKB Chain 54 279 . . . ID=PRO_0000397575;Note=Proteasome subunit beta A8M2A3 UniProtKB Active site 54 54 . . . Note=Nucleophile;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_02113