Cleavage and polyadenylation specificity factor subunit 5 (Cleavage and polyadenylation specificity factor 25 kDa subunit) (CPSF 25 kDa subunit) (Cleavage factor Im complex 25 kDa subunit) (CFIm25) (Nucleoside diphosphate-linked moiety X motif 21) (Nudix motif 21) (Nudix hydrolase 21) (Pre-mRNA cleavage factor Im 68 kDa subunit)
1_MSVVP 6_ PNRSQ 11_ TGWPR 16_ GVTQF 21_ GNKYI 26_ QQTKP 31_ LTLER 36_ TINLY 41_ PLTNY 46_ TFGTK 51_ EPLYE 56_ KDSSV 61_ AARFQ 66_ RMREE 71_ FDKIG 76_ MRRTV 81_ EGVLI 86_ VHEHR 91_ LPHVL 96_ LLQLG 101_ TTFFK 106_ LPGGE 111_ LNPGE 116_ DEVEG 121_ LKRLM 126_ TEILG 131_ RQDGV 136_ LQDWV 141_ IDDCI 146_ GNWWR 151_ PNFEP 156_ PQYPY 161_ IPAHI 166_ TKPKE 171_ HKKLF 176_ LVQLQ 181_ EKALF 186_ AVPKN 191_ YKLVA 196_ APLFE 201_ LYDNA 206_ PGYGP 211_ IISSL 216_ PQLLS 221_RFNFI
1: Component of the cleavage factor Im (CFIm) complex that functions as an activator of the pre-mRNA 3'-end cleavage and polyadenylation processing required for the maturation of pre-mRNA into functional mRNAs (PubMed:14690600, PubMed:15937220, PubMed:17024186, PubMed:17098938, PubMed:29276085, PubMed:8626397, PubMed:9659921). CFIm contributes to the recruitment of multiprotein complexes on specific sequences on the pre-mRNA 3'-end, so called cleavage and polyadenylation signals (pA signals) (PubMed:14690600, PubMed:17024186, PubMed:8626397, PubMed:9659921). Most pre-mRNAs contain multiple pA signals, resulting in alternative cleavage and polyadenylation (APA) producing mRNAs with variable 3'-end formation (PubMed:17098938, PubMed:23187700, PubMed:29276085). The CFIm complex acts as a key regulator of cleavage and polyadenylation site choice during APA through its binding to 5'-UGUA-3' elements localized in the 3'-untranslated region (UTR) for a huge number of pre-mRNAs (PubMed:17098938, PubMed:20695905, PubMed:29276085). NUDT21/CPSF5 activates indirectly the mRNA 3'-processing machinery by recruiting CPSF6 and/or CPSF7 (PubMed:29276085). Binds to 5'-UGUA-3' elements localized upstream of pA signals that act as enhancers of pre-mRNA 3'-end processing (PubMed:14690600, PubMed:15169763, PubMed:17024186, PubMed:20479262, PubMed:22813749, PubMed:8626397). The homodimer mediates simultaneous sequence-specific recognition of two 5'-UGUA-3' elements within the pre-mRNA (PubMed:20479262, PubMed:21295486). Plays a role in somatic cell fate transitions and pluripotency by regulating widespread changes in gene expression through an APA-dependent function (By similarity). Binds to chromatin (By similarity). Binds to, but does not hydrolyze mono- and di-adenosine nucleotides (PubMed:18445629)