USP3(redirected from ubiquitin-specific peptidase 3)
USP3A gene on chromosome 15q22.3 that encodes an enzyme which deubiquitinates monoubiquitinated target proteins, such as histones H2A and H2B. USP3 is required for progression through S-phase and mitotic entry; it may regulate the DNA damage response (DDR) checkpoint by deubiquitinating H2A at DNA damage sites. It associates with chromatin and is expressed in all tissues, especially the pancreas.
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