Aliases for CPSF3 Gene
External Ids for CPSF3 Gene
Previous GeneCards Identifiers for CPSF3 Gene
This gene encodes a member of the metallo-beta-lactamase family. The encoded protein is a 73kDa subunit of the cleavage and polyadenylation specificity factor and functions as an endonuclease that recognizes the pre-mRNA 3'-cleavage site AAUAAA prior to polyadenylation. It also cleaves after the pre-mRNA sequence ACCCA during histone 3'-end pre-mRNA processing. [provided by RefSeq, Oct 2012]
GeneCards Summary for CPSF3 Gene
CPSF3 (Cleavage And Polyadenylation Specific Factor 3) is a Protein Coding gene. Among its related pathways are mRNA surveillance pathway and Formation of HIV elongation complex in the absence of HIV Tat. GO annotations related to this gene include RNA binding and 5-3 exonuclease activity. An important paralog of this gene is INTS11.
UniProtKB/Swiss-Prot for CPSF3 Gene
Component of the cleavage and polyadenylation specificity factor (CPSF) complex that play a key role in pre-mRNA 3-end formation, recognizing the AAUAAA signal sequence and interacting with poly(A) polymerase and other factors to bring about cleavage and poly(A) addition. Has endonuclease activity, and functions as mRNA 3-end-processing endonuclease. Also involved in the histone 3-end pre-mRNA processing. U7 snRNP-dependent protein that induces both the 3-endoribonucleolytic cleavage of histone pre-mRNAs and acts as a 5 to 3 exonuclease for degrading the subsequent downstream cleavage product (DCP) of mature histone mRNAs. Cleavage occurs after the 5-ACCCA-3 sequence in the histone pre-mRNA leaving a 3hydroxyl group on the upstream fragment containing the stem loop (SL) and 5 phosphate on the downstream cleavage product (DCP) starting with CU nucleotides. The U7-dependent 5 to 3 exonuclease activity is processive and degrades the DCP RNA substrate even after complete removal of the U7-binding site. Binds to the downstream cleavage product (DCP) of histone pre-mRNAs and the cleaved DCP RNA substrate in a U7 snRNP dependent manner.