ATP + L-tyrosyl-[protein] = ADP + H(+) + O-phospho-L-tyrosyl-[protein] The F-BAR domain is truncated and contains only the FCH region (the coiled-coil region is missing). This protein is synthesized as a Gag-Fes polyprotein. Belongs to the protein kinase superfamily. Tyr protein kinase family. Fes/fps subfamily.