CPSF4

Cleavage and polyadenylation specificity factor subunit 4 is a protein that in humans is encoded by the CPSF4 gene.^[5][6][7]

PDBOrtholog search: PDBe RCSB

AliasesCPSF4, CPSF30, NAR, NEB1, NEB-1, cleavage and polyadenylation specific factor 4

External IDsOMIM: 603052; MGI: 1861602; HomoloGene: 38216; GeneCards: CPSF4; OMA:CPSF4 - orthologs

Chr.Chromosome 7 (human)^[1]

Quick facts Available structures, PDB ...

CPSF4
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 2D9N, 2RHK
Identifiers
Aliases	CPSF4, CPSF30, NAR, NEB1, NEB-1, cleavage and polyadenylation specific factor 4
External IDs	OMIM: 603052; MGI: 1861602; HomoloGene: 38216; GeneCards: CPSF4; OMA:CPSF4 - orthologs
Gene location (Human) Chr. Chromosome 7 (human)[1] Band 7q22.1 Start 99,438,922 bp[1] End 99,457,373 bp[1]
Gene location (Mouse) Chr. Chromosome 5 (mouse)[2] Band 5|5 G2 Start 145,104,023 bp[2] End 145,118,851 bp[2]
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in secondary oocyte right hemisphere of cerebellum gastric mucosa right frontal lobe left testis right testis tibial nerve endothelial cell body of pancreas ectocervix Top expressed in epiblast cumulus cell yolk sac internal carotid artery external carotid artery mandibular prominence maxillary prominence somite spermatocyte blood More reference expression data BioGPS More reference expression data
Gene ontology Molecular function nucleic acid binding zinc ion binding protein binding metal ion binding endoribonuclease activity RNA binding Cellular component mRNA cleavage and polyadenylation specificity factor complex nucleus nucleoplasm intracellular membrane-bounded organelle Biological process mRNA processing modification by virus of host mRNA processing viral process tRNA splicing, via endonucleolytic cleavage and ligation mRNA splicing, via spliceosome termination of RNA polymerase II transcription mRNA polyadenylation mRNA export from nucleus mRNA 3'-end processing RNA phosphodiester bond hydrolysis, endonucleolytic pre-mRNA cleavage required for polyadenylation Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 10898 54188 Ensembl ENSG00000160917 ENSMUSG00000029625 UniProt O95639 Q8BQZ5 RefSeq (mRNA) NM_001081559 NM_006693 NM_001318160 NM_001318161 NM_001318162 NM_001291248 NM_001291249 NM_178576 NM_001374716 RefSeq (protein) NP_001075028 NP_001305089 NP_001305090 NP_001305091 NP_006684 NP_001278177 NP_001278178 NP_848671 NP_001361645 Location (UCSC) Chr 7: 99.44 – 99.46 Mb Chr 5: 145.1 – 145.12 Mb PubMed search [3] [4]
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Inhibition of the nuclear export of poly(A)-containing mRNAs caused by the influenza A virus NS1 protein requires its effector domain. The NS1 effector domain functionally interacts with the cellular 30 kDa subunit of cleavage and polyadenylation specific factor 4, an essential component of the 3' end processing machinery of cellular pre-mRNAs.

In influenza virus-infected cells, the NS1 protein is physically associated with cleavage and polyadenylation specific factor 4, 30kD subunit. Binding of the NS1 protein to the 30 kDa protein in vitro prevents CPSF binding to the RNA substrate and inhibits 3' end cleavage and polyadenylation of host pre-mRNAs.

Thus the NS1 protein selectively inhibits the nuclear export of cellular, and not viral, mRNAs. Multiple alternatively spliced transcript variants that encode different isoforms have been described for this gene.^[7]