Involved in poly(A) tail length control in neuronal cells. Binds the polyadenosine RNA oligonucleotides. Interacts with HOOK2. Interacts with ZFC3H1 in a RNase-sensitive manner. Colocalizes with poly(A) RNA in nuclear speckles. Expressed in hippocampal pyramidal neurons (at protein level) (PubMed:21734151).Expressed in kidney, liver, muscle, heart brain and testes (PubMed:19303045). Expressed in hippocampal pyramidal neurons (PubMed:21734151). Belongs to the ZC3H14 family.