PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 26195632-7 2015 Therefore, we propose that polyQ-expanded Atx7 forms insoluble aggregates that sequester USP22 into a catalytically inactive state, and then the impaired DUBm loses the function to deubiquitinate monoubiquitinated histone H2B or H2A. polyglutamine 27-32 H2A clustered histone 18 Homo sapiens 229-232