UNIPROT #

P09619

PROTEIN NAME

PDGF Receptor beta

SYNONYMS

Beta platelet derived growth factor receptor antibody; Beta-type platelet-derived growth factor receptor antibody; CD 140B antibody; CD140 antigen-like family member B antibody; CD140b antibody; CD140b antigen antibody; IBGC4 antibody; IMF1 antibody; JTK12 antibody; OTTHUMP00000160528 antibody; PDGF R beta antibody; PDGF-R-beta antibody; PDGFR 1 antibody; PDGFR antibody; PDGFR beta antibody; PDGFR1 antibody; PDGFRB antibody; PGFRB_HUMAN antibody; Platelet derived growth factor receptor 1 antibody; Platelet derived growth factor receptor beta antibody; Platelet derived growth factor receptor beta polypeptide antibody

SEQUENCE SIMILARITIES

Belongs to the protein kinase superfamily. Tyr protein kinase family. CSF-1/PDGF receptor subfamily.

POST-TRANSLATIONAL MODIFICATION

Autophosphorylated on tyrosine residues upon ligand binding. Autophosphorylation occurs in trans, i.e. one subunit of the dimeric receptor phosphorylates tyrosine residues on the other subunit. Phosphorylation at Tyr-579, and to a lesser degree, at Tyr-581, is important for interaction with SRC family kinases. Phosphorylation at Tyr-740 and Tyr-751 is important for interaction with PIK3R1. Phosphorylation at Tyr-751 is important for interaction with NCK1. Phosphorylation at Tyr-771 and Tyr-857 is important for interaction with RASA1/GAP. Phosphorylation at Tyr-857 is important for efficient phosphorylation of PLCG1 and PTPN11, resulting in increased phosphorylation of AKT1, MAPK1/ERK2 and/or MAPK3/ERK1, PDCD6IP/ALIX and STAM, and in increased cell proliferation. Phosphorylation at Tyr-1009 is important for interaction with PTPN11. Phosphorylation at Tyr-1009 and Tyr-1021 is important for interaction with PLCG1. Phosphorylation at Tyr-1021 is important for interaction with CBL; PLCG1 and CBL compete for the same binding site. Dephosphorylated by PTPRJ at Tyr-751, Tyr-857, Tyr-1009 and Tyr-1021. Dephosphorylated by PTPN2 at Tyr-579 and Tyr-1021.; N-glycosylated.; Ubiquitinated. After autophosphorylation, the receptor is polyubiquitinated, leading to its degradation.

SUBCELLULAR LOCATION

Cell membrane, Cytoplasmic vesicle, Lysosome lumen.

FUNCTION

Platelet-derived growth factor (PDGF) is a mitogen for mesenchyme- and glia-derived cells. PDGF consists of two chains, A and B, which dimerize to form functionally distinct isoforms, PGDF-AA, PDGF-AB and PDGF-BB. These three isoforms bind with different affinities to two receptor types, PDGFR-α and –β, which are endowed with protein tyrosine kinase domains. PDGFR-α can bind to both A and B subunits of PDGF, while PDGFR-β can only bind the B subunit. Ligand binding promotes either homo- or heterodimerization of the PDGF receptors in a specific manner. PDGF-AA induces the dimerization of two α receptors, PDGF-AB induces dimerization of αα and αβ and PDGF-BB induces the formation of three types of dimers, αα, αβ and ββ. Translocation of the PDGFR-∫ gene with the Tel gene is linked to chronic myelomonocytic leukemia (CMML), a myelodysplastic syndrome, and demonstrates the oncogenic potential of the PDGF receptors.