Catalytic activity:ATP + a [protein]-L-tyrosine = ADP + a [protein]-L-tyrosine phosphate. ,Disease:A fusion of PDGFRA and FIP1L1 (FIP1L1-PDGFRA) , due to an interstitial chromosomal deletion , is the cause of some cases of hypereosinophilic syndrome (HES) [MIM:607685]. HES is a rare hematologic disorder characterized by sustained overproduction of eosinophils in the bone marrow , eosinophilia , tissue infiltration and organ damage. ,Function:Receptor that binds both PDGFA and PDGFB and has a tyrosine-protein kinase activity. ,similarity:Belongs to the protein kinase superfamily. Tyr protein kinase family. CSF-1/PDGF receptor subfamily. ,similarity:Contains 1 protein kinase domain. ,similarity:Contains 5 Ig-like C2-type (immunoglobulin-like) domains. ,subunit:Homodimer , and heterodimer with PDGFRB. Interacts with the SH2 domain of SHB via phosphorylated Tyr-720 (By similarity) . Interacts with the SH2 domain of SHF via phosphorylated Tyr-720. ,tissue specificity:Expressed in primary and metastatic colon tumors and in normal colon tissue. Tumors may express a different isoform to that found in normal tissue. ,
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