PARN Antibody – Rabbit Polyclonal

PARN: 3'-exoribonuclease that has a preference for poly(A) tails of mRNAs, thereby efficiently degrading poly(A) tails. Exonucleolytic degradation of the poly(A) tail is often the first step in the decay of eukaryotic mRNAs and is also used to silence certain maternal mRNAs translationally during oocyte maturation and early embryonic development. Interacts with both the 3'-end poly(A) tail and the 5'-end cap structure during degradation, the interaction with the cap structure being required for an efficient degradation of poly(A) tails. Involved in nonsense-mediated mRNA decay, a critical process of selective degradation of mRNAs that contain premature stop codons. Also involved in degradation of inherently unstable mRNAs that contain AU-rich elements (AREs) in their 3'-UTR, possibly via its interaction with KHSRP. Probably mediates the removal of poly(A) tails of AREs mRNAs, which constitutes the first step of destabilization. Homodimer. Interacts with KHSRP and CELF1/CUGBP1. Found in a mRNA decay complex with RENT1, RENT2 and RENT3B. Ubiquitous. Belongs to the CAF1 family. 3 isoforms of the human protein are produced by alternative splicing.

Protein type: EC 3.1.13.4; Ribonuclease; RNA-binding; Nucleolus

Cellular Component: cytoplasm; nucleus

Molecular Function: protein binding; nuclease activity; poly(A)-specific ribonuclease activity; nucleic acid binding; hydrolase activity; RNA binding; metal ion binding; exonuclease activity; nucleotide binding; protein kinase binding

Biological Process: poly(A) tail shortening; mRNA catabolic process; mRNA catabolic process, nonsense-mediated decay