Cleavage and polyadenylation specificity factor subunit 1 is a protein that in humans is encoded by the CPSF1gene.[5][6][7]
In most cases eukaryotic pre-messenger(m)RNA 3 prime ends are processed in two coordinated steps. First there is a site-specific cleavage by an endonuclease and then the addition of a poly(A) tail at the 3 prime end of the 5 prime cleavage product. Cleavage requires four multisubunit complexes, namely cleavage and polyadenylation specificity factor (CPSF), cleavage stimulation factor (CstF), cleavage factors Im and IIm (CFIm and CFIIm), along with a single subunit poly(A)polymerase (PAP). CPSF1 is the largest component of the CPSF complex composed of CPSF1, CPSF2, CPSF3, CPSF4, FIP1L1, Symplekin and WDR33 and located in the nucleus.[8]
Samiotaki M, Balatsos NA, Courtis N, Tsiapalis CM (2001). "Assignment of the 160-kDa subunit of cleavage and polyadenylation specificity factor (CPSF1) to human chromosome 8q24.23 by radiation hybrid mapping". Cytogenet. Cell Genet. 90 (3–4): 234–5. doi:10.1159/000056776. PMID11124521. S2CID202645825.
Maeda Y, Ito M, Harashima N, et al. (2002). "Cleavage and polyadenylation specificity factor (CPSF)-derived peptides can induce HLA-A2-restricted and tumor-specific CTLs in the majority of gastrointestinal cancer patients". Int. J. Cancer. 99 (3): 409–17. doi:10.1002/ijc.10377. PMID11992410. S2CID12789683.
Lehner B, Semple JI, Brown SE, et al. (2004). "Analysis of a high-throughput yeast two-hybrid system and its use to predict the function of intracellular proteins encoded within the human MHC class III region". Genomics. 83 (1): 153–67. doi:10.1016/S0888-7543(03)00235-0. PMID14667819.
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