"Interacting selectively with a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose moiety [goid 166] [evidence IEA]; Catalysis of the reaction: ATP + a protein tyrosine = ADP + protein tyrosine phosphate [goid 4713] [evidence IEA]; Interacting selectively with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules) [goid 5515] [evidence IEA]; Interacting selectively with ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator [goid 5524] [evidence IEA]; Catalysis of the transfer of a group, e.g. a methyl group, glycosyl group, acyl group, phosphorus-containing, or other groups, from one compound (generally regarded as the donor) to another compound (generally regarded as the acceptor). Transferase is the systematic name for any enzyme of EC class 2 [goid 16740] [evidence IEA]; Interacting selectively with a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose moiety [goid 166] [evidence IEA]; Interacting selectively with a glycoprotein, a protein that contains covalently bound glycose (monosaccharide) residues. These also include proteoglycans [goid 1948] [pmid 15554700] [evidence IPI]; Interacting selectively with a glycoprotein, a protein that contains covalently bound glycose (monosaccharide) residues. These also include proteoglycans [goid 1948] [pmid 14625311] [evidence IPI]; Interacting selectively with a glycoprotein, a protein that contains covalently bound glycose (monosaccharide) residues. These also include proteoglycans [goid 1948] [pmid 7513706] [evidence IPI]; Catalysis of the reaction: ATP + a protein tyrosine = ADP + protein tyrosine phosphate [goid 4713] [evidence IEA]; Catalysis of the reaction: ATP + a protein-L-tyrosine = ADP + a protein-L-tyrosine phosphate [goid 4715] [evidence IEA]; Catalysis of the reaction: protein serine/threonine phosphate + H2O = protein serine/threonine + phosphate [goid 4722] [pmid 8506364] [evidence IDA]; Interacting selectively with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules) [goid 5515] [evidence IEA]; Interacting selectively with ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator [goid 5524] [evidence IEA]; Interacting selectively with a protein C-terminus, the end of any peptide chain at which the 1-carboxy function of a constituent amino acid is not attached in peptide linkage to another amino-acid residue [goid 8022] [pmid 16245368] [evidence IPI]; Catalysis of the transfer of a group, e.g. a methyl group, glycosyl group, acyl group, phosphorus-containing, or other groups, from one compound (generally regarded as the donor) to another compound (generally regarded as the acceptor). Transferase is the systematic name for any enzyme of EC class 2 [goid 16740] [evidence IEA]; Interacting selectively with a protein kinase, any enzyme that catalyzes the transfer of a phosphate group, usually from ATP, to a protein substrate [goid 19901] [pmid 8618896] [evidence IPI]; Interacting selectively with a SH2 domain (Src homology 2) of a protein, a protein domain of about 100 amino-acid residues and belonging to the alpha + beta domain class [goid 42169] [pmid 8794306] [evidence IPI]; Interacting selectively with a SH2 domain (Src homology 2) of a protein, a protein domain of about 100 amino-acid residues and belonging to the alpha + beta domain class [goid 42169] [pmid 7852312] [evidence IPI]; Interacting selectively with a CD4, a receptor found on the surface of T cells, monocytes and macrophages [goid 42609] [pmid 7486703] [evidence IPI]; Interacting selectively with a CD8, a receptor found on the surface of thymocytes and cytotoxic and suppressor T-lymphocytes [goid 42610] [pmid 2470098] [evidence IPI]; Interacting selectively with a phosphoinositide 3-kinase, any enzyme that catalyzes the addition of a phosphate group to an inositol lipid at the 3' position of the inositol ring [goid 43548] [pmid 7504174] [evidence IPI]; Interacting selectively with an ATPase, any enzyme that catalyzes the hydrolysis of ATP [goid 51117] [pmid 15671290] [evidence IPI]"