Catalyzes the transfer of one adenosine molecule from an ATP to an mRNA poly(A) tail bearing a 3'-OH terminal group and enhances mRNA stability and gene expression. Can also elongate RNA oligos ending with uridine molecule, provided that the sequence is adenosine-rich. Mainly targets mRNAs encoding endoplasmic reticulum-targeted protein.
Subcellular locations: Nucleus, Cytoplasm, Cytoplasm, Cytoskeleton, Microtubule organizing center, Centrosome
Recruited into the centrosome through its interaction with PLK4.