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Zinc-finger proteins contain DNA-binding domains and have a wide variety of functions, most of which encompass some form of transcriptional activation or repression. NP220 (Nuclear protein 220), also designated Zinc finger protein 638 (ZNF638) or Cutaneous T-cell lymphoma-associated antigen se33-1, is a 1978 amino acid protein that contains one matrin-type zinc finger and two RRM (RNA recognition motif) domains, suggesting a role in transcriptional regulation. NP220 binds to double-stranded DNA fragments by recognizing clusters of cytidines. NP220 interacts with FHL-2 and is also thought to be phosphorylated by ATM or ATR upon DNA damage. It exists as five isoforms as a result of alternative splicing events. Isoform five of NP220 is a tumor-associated antigen found in several cutaneous T-cell lymphoma (CTCL), and in particular in mycosis fungoides patients and in Sezary syndrome patients.
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Protein Aliases: CTCL tumor antigen se33-1; CTCL-associated antigen se33-1; Cutaneous T-cell lymphoma-associated antigen se33-1; NP220 nuclear protein; Nuclear protein 220; Zinc finger matrin-like protein; Zinc finger protein 638
Gene Aliases: NP220; ZFML; Zfp638; ZNF638
UniProt ID: (Human) Q14966
Entrez Gene ID: (Human) 27332