ID:CPSF5_HUMAN DESCRIPTION: RecName: Full=Cleavage and polyadenylation specificity factor subunit 5; AltName: Full=Cleavage and polyadenylation specificity factor 25 kDa subunit; Short=CFIm25; Short=CPSF 25 kDa subunit; AltName: Full=Nucleoside diphosphate-linked moiety X motif 21; Short=Nudix motif 21; AltName: Full=Pre-mRNA cleavage factor Im 25 kDa subunit; FUNCTION: Component of the cleavage factor Im (CFIm) complex that plays a key role in pre-mRNA 3'-processing. Involved in association with CPSF6 or CPSF7 in pre-MRNA 3'-end poly(A) site cleavage and poly(A) addition. NUDT21/CPSF5 binds to cleavage and polyadenylation RNA substrates. The homodimer mediates simultaneous sequence-specific recognition of two 5'-UGUA-3' elements within the pre-mRNA. Binds to, but does not hydrolyze mono- and di-adenosine nucleotides. May have a role in mRNA export. SUBUNIT: Homodimer. Component of the cleavage factor Im (CFIm) complex, composed of, at least, NUDT21/CPSF5 and CPSF6 or CPSF7. Within the cleavage factor Im complex, the NUDT21/CPSF5 homodimer is at the core of a heterotetramer, and is clasped by two additional subunits (CPSF6 or CPSF7). Interacts with CPSF6, CPSF7, PABPN1 and SNRNP70. Interacts with PAPOLA; the interaction is diminished by acetylation. INTERACTION: P54253:ATXN1; NbExp=2; IntAct=EBI-355720, EBI-930964; SUBCELLULAR LOCATION: Nucleus. Note=In punctate subnuclear structures localized adjacent to nuclear speckles, called paraspeckles. PTM: Acetylated mainly by p300/CBP, recruited to the complex by CPSF6. Acetylation decreases interaction with PAPAO. Deacetylated by the class I/II HDACs, HDAC1, HDAC3 and HDAC10, and by the class III HDACs, SIRT1 AND SIRT2. SIMILARITY: Belongs to the Nudix hydrolase family. CPSF5 subfamily. SIMILARITY: Contains 1 nudix hydrolase domain. CAUTION: Lacks the conserved metal-binding residues in the NUDIX motif and does not have hydrolase activity.
The RNAfold program from the Vienna RNA Package is used to perform the secondary structure predictions and folding calculations. The estimated folding energy is in kcal/mol. The more negative the energy, the more secondary structure the RNA is likely to have.
ModBase Predicted Comparative 3D Structure on O43809
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Orthologous Genes in Other Species
Orthologies between human, mouse, and rat are computed by taking the best BLASTP hit, and filtering out non-syntenic hits. For more distant species reciprocal-best BLASTP hits are used. Note that the absence of an ortholog in the table below may reflect incomplete annotations in the other species rather than a true absence of the orthologous gene.
Protein O43809 (Reactome details) participates in the following event(s):
R-HSA-72231 Cleavage and Polyadenylation R-HSA-77591 Binding of Cleavage factors and Poly(A)Polymerase to the CstF:CPSF:Pre-mRNA Complex R-HSA-72180 Cleavage of mRNA at the 3'-end R-HSA-77592 Cleavage of Intronless Pre-mRNA at 3'-end R-HSA-77593 Cleavage and polyadenylation of Intronless Pre-mRNA R-HSA-72130 Formation of an intermediate Spliceosomal C (Bact) complex R-HSA-72143 Lariat Formation and 5'-Splice Site Cleavage R-HSA-72139 Formation of the active Spliceosomal C (B*) complex R-HSA-8849157 TREX complex binds spliced, capped mRNA:CBC:EJC cotranscriptionally R-HSA-156661 Formation of Exon Junction Complex R-HSA-72163 mRNA Splicing - Major Pathway R-HSA-77595 Processing of Intronless Pre-mRNAs R-HSA-72187 mRNA 3'-end processing R-HSA-109688 Cleavage of Growing Transcript in the Termination Region R-HSA-72172 mRNA Splicing R-HSA-75067 Processing of Capped Intronless Pre-mRNA R-HSA-72203 Processing of Capped Intron-Containing Pre-mRNA R-HSA-73856 RNA Polymerase II Transcription Termination R-HSA-8953854 Metabolism of RNA R-HSA-73857 RNA Polymerase II Transcription R-HSA-74160 Gene expression (Transcription)
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Sequence and Links to Tools and Databases 
Common Gene Haplotype Alleles 
