CPEB4 Antibody from MyBioSource.com

Function: Sequence-specific RNA-binding protein that binds to the cytoplasmic polyadenylation element (CPE), an uridine-rich sequence element (consensus sequence 5'-UUUUUAU-3') within the mRNA 3'-UTR (PubMed:24990967). RNA binding results in a clear conformational change analogous to the Venus fly trap mechanism (PubMed:24990967). Regulates activation of unfolded protein response (UPR) in the process of adaptation to ER stress in liver, by maintaining translation of CPE-regulated mRNAs in conditions in which global protein synthesis is inhibited (By similarity). Required for cell cycle progression, specifically for cytokinesis and chromosomal segregation (PubMed:26398195). Plays a role as an oncogene promoting tumor growth and progression by positively regulating translation of t-plasminogen activator/PLAT (PubMed:22138752). Stimulates proliferation of melanocytes (PubMed:27857118). In contrast to CPEB1 and CPEB3, does not play role in synaptic plasticity, learning and memory (By similarity).

Subcellular Location: Cytoplasm. Cell projection>Dendrite. Cell projection>Dendritic spine. Cell junction>Synapse>Postsynaptic density. Cell projection>Axon. Cell projection>Growth cone. Endoplasmic reticulum. Cytoplasm>Perinuclear region.

Tissue Specificity: Expressed in pancreas in islets and ductal cells (at protein level) (PubMed:22138752). Expressed in melanocytes (PubMed:27857118).

Subunit Structure: Interacts with TOB1.

Similarity: The 2 RRM domains and the C-terminal region mediate interaction with CPE-containing RNA (PubMed:24990967). The interdomain linker (564-579) acts as a hinge to fix the relative orientation of the 2 RRMs (PubMed:24990967). The ZZ domain (509-566) coordinates 2 Zn ions and is probably implicated in mediating interactions with other proteins in addition to increasing the affinity of the RRMs for the CPEs (By similarity). Unlike in CPEB1, a continuous polar interface is formed between the 2 RRMs (PubMed:24990967).Belongs to the RRM CPEB family