##gff-version 3 P50103 UniProtKB Chain 1 223 . . . ID=PRO_0000211057;Note=Ubiquitin carboxyl-terminal hydrolase isozyme L1 P50103 UniProtKB Propeptide 221 223 . . . ID=PRO_0000421570;Note=Removed in mature form;Ontology_term=ECO:0000250;evidence=ECO:0000250 P50103 UniProtKB Region 5 10 . . . Note=Interaction with ubiquitin;Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:P09936 P50103 UniProtKB Region 211 216 . . . Note=Interaction with ubiquitin;Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:P09936 P50103 UniProtKB Active site 90 90 . . . Note=Nucleophile;Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU10091 P50103 UniProtKB Active site 161 161 . . . Note=Proton donor;Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU10091 P50103 UniProtKB Site 176 176 . . . Note=Important for enzyme activity;Ontology_term=ECO:0000250;evidence=ECO:0000250 P50103 UniProtKB Modified residue 125 125 . . . Note=Phosphoserine;Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:Q00981 P50103 UniProtKB Lipidation 220 220 . . . Note=S-farnesyl cysteine;Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:P09936