Ubiquitin specific peptidase 21 pseudogene 2 (USP21P2)

Ubiquitin specific peptidase 21 pseudogene 2 (USP21P2) is annotated as a *pseudogene* in genomic databases. Pseudogenes are non-functional genomic segments that closely resemble protein-coding genes (in this case, USP21) but typically do not transcribe functional RNA or protein. USP21P2 lacks demonstrated enzymatic or biological activity, is not currently implicated in any disease or therapeutic context, and is not considered a drug target. Scientific literature and curated gene databases do not ascribe molecular or biological properties to USP21P2 beyond its nomenclature resemblance to USP21[3]. The *functional gene* "Ubiquitin specific peptidase 21" (USP21), which USP21P2 resembles, is an active deubiquitinating enzyme involved in protein degradation, cell signaling, transcriptional regulation, and cancer biology[1][2][3]. USP21 is considered a therapeutic target in specific diseases, but USP21P2 is not functionally equivalent and should not be conflated with USP21. No drugs or biomarkers are ascribed to USP21P2, and there are no safety concerns or therapeutic challenges associated with it as it is nonfunctional. USP21P2 is a non-functional pseudogene and is not a validated therapeutic target, gene product, or molecule involved in known biological functions or disease roles. For drug development or biological research, USP21P2 should be clearly distinguished from its functional paralog, USP21.

Other names

USP21P2ubiquitin specific peptidase 21 pseudogene 2USP21 pseudogene 2