##gff-version 3 C8XAQ4 UniProtKB Propeptide 1 57 . . . ID=PRO_0000397556;Note=Removed in mature form%3B by autocatalysis;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_02113 C8XAQ4 UniProtKB Chain 58 288 . . . ID=PRO_0000397557;Note=Proteasome subunit beta C8XAQ4 UniProtKB Active site 58 58 . . . Note=Nucleophile;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_02113