PCBP1

PCBP1 is thought to have been generated by retrotransposition of a fully processed PCBP-2 mRNA. This gene and PCBP-2 have paralogues (PCBP3 and PCBP4) which are thought to have arisen as a result of duplication events of entire genes. The protein encoded by this gene appears to be multifunctional. It along with PCBP-2 and hnRNPK corresponds to the major cellular poly(rC)-binding protein. It contains three K-homologous (KH) domains which may be involved in RNA binding. This encoded protein together with PCBP-2 also functions as translational coactivators of poliovirus RNA via a sequence-specific interaction with stem-loop IV of the IRES and promote poliovirus RNA replication by binding to its 5'-terminal cloverleaf structure. It has also been implicated in translational control of the 15-lipoxygenase mRNA, human Papillomavirus type 16 L2 mRNA, and hepatitis A virus RNA. The encoded protein is also suggested to play a part in formation of a sequence-specific alpha-globin mRNP complex which is associated with alpha-globin mRNA stability.

Full Name

Poly(RC) Binding Protein 1

Function

Single-stranded nucleic acid binding protein that binds preferentially to oligo dC. In case of infection by poliovirus, plays a role in initiation of viral RNA replication in concert with the viral protein 3CD (PubMed:12414943).

Biological Process

Positive regulation of transcription by RNA polymerase IIManual Assertion Based On ExperimentIBA:GO_Central
Regulation of gene expressionManual Assertion Based On ExperimentIBA:GO_Central
Regulation of RNA metabolic processManual Assertion Based On ExperimentIBA:GO_Central
Viral RNA genome replicationManual Assertion Based On ExperimentIDA:UniProtKB

Cellular Location

Nucleus
Cytoplasm
Loosely bound in the nucleus. May shuttle between the nucleus and the cytoplasm.

PTM

Phosphorylated; lowers poly(rC)-binding activity.