Recombinant Human Poly (rC)-binding protein 1 (PCBP1)

Uniprot Id

Q15365

Target Species

Human

Target Name

PCBP1

Target Full Name

Poly(rC)-binding protein 1

Target 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.

Target Subcellular Location

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

Target Tissue Specificity

Abundantly expressed in skeletal muscle, thymus and peripheral blood leukocytes while a lower expression is observed in prostate, spleen, testis, ovary, small intestine, heart, liver, adrenal and thyroid glands.

Target Synonyms

Alpha-CP1; Heterogeneous nuclear ribonucleoprotein E1; heterogenous nuclear ribonucleoprotein E1; heterogenous nuclear ribonucleoprotein X; hnRNP E1; hnRNP-E1 ; hnRNP-X ; HNRPE1; HNRPX; nucleic acid binding protein sub 2.3; Nucleic acid- binding protein SUB2.3; Nucleic acid-binding protein SUB2.3; PCBP1; PCBP1_HUMAN; poly(rC) binding protein 1; Poly(rC)-binding protein 1; rCbinding protein 1

Target Background

This intronless gene 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.