This gene encodes a member of the poly(A) polymerase family which catalyzes template-independent extension of the 3' end of a DNA/RNA strand. This enzyme shares 60% identity to the well characterized poly(A) polymerase II (PAPII) at the amino acid level. These two enzymes have similar organization of structural and functional domains. This enzyme is exclusively localized in the nucleus and exhibits both nonspecific and CPSF (cleavage and polyadenylation specificity factor)/AAUAAA-dependent polyadenylation activity. This gene is located on chromosome 2 in contrast to the PAPII gene, which is located on chromosome 14. [provided by RefSeq, Jul 2008].
Muniz, Davidson, West: "Poly(A) Polymerase and the Nuclear Poly(A) Binding Protein, PABPN1, Coordinate the Splicing and Degradation of a Subset of Human Pre-mRNAs." in: Molecular and cellular biology, Vol. 35, Issue 13, pp. 2218-30, (2015) (PubMed).
Bresson, Conrad: "The human nuclear poly(a)-binding protein promotes RNA hyperadenylation and decay." in: PLoS genetics, Vol. 9, Issue 10, pp. e1003893, (2013) (PubMed).