Down syndrome critical region protein 4 (DSCR4)

Down syndrome critical region protein 4 (DSCR4) is a human-specific protein encoded by a gene located on chromosome 21, particularly within the Down syndrome critical region. DSCR4 arose de novo in primate evolution and is not present in rodents or many non-primate species[1][2]. It displays high sequence conservation among Hominidae, suggesting a specialized role in higher-order brain or developmental processes[2]. DSCR4 is mostly expressed in migratory cell types (e.g., leukocytes, neural crest cells), with bioinformatic analyses and transcriptomic profiling indicating that it participates in interconnected biological pathways that control cell migration, blood coagulation, and immune functions[1][2]. Overexpression of DSCR4 — as occurs in individuals with Down syndrome (due to trisomy 21) — is associated with gene networks affecting coagulation, immune response, and cell movement, supporting the idea that DSCR4 misregulation may contribute to Down syndrome phenotypes such as altered facial morphology, immune deficiency, and increased risk of leukemia[1]. DSCR4 does not belong to established molecular target families such as receptors, enzymes, or transporters, is not currently considered a therapeutic target, and has no known drugs acting upon it[1][2]. Its function is under active investigation; roles and mechanisms are predicted but not yet experimentally confirmed.

Other names

Down syndrome critical region 4DSCR4DCRBDSCRBDown syndrome critical region protein BDown syndrome critical region gene 4