ALK7: Serine/threonine protein kinase which forms a receptor complex on ligand binding. The receptor complex consisting of 2 type II and 2 type I transmembrane serine/threonine kinases. Type II receptors phosphorylate and activate type I receptors which autophosphorylate, then bind and activate SMAD transcriptional regulators, SMAD2 and SMAD3. Receptor for activin AB, activin B and NODAL. Plays a role in cell differentiation, growth arrest and apoptosis. Belongs to the protein kinase superfamily. TKL Ser/Thr protein kinase family. TGFB receptor subfamily. 4 isoforms of the human protein are produced by alternative splicing.
Protein type: Membrane protein, integral; Protein kinase, TKL; Kinase, protein; Protein kinase, Ser/Thr (receptor); EC 2.7.11.30; TKL group; STKR family; Type1 subfamily
Cellular Component: cell surface; membrane; cytoplasm; integral to membrane; plasma membrane; activin receptor complex
Molecular Function: metal ion binding; nucleotide binding; transmembrane receptor protein serine/threonine kinase activity; protein kinase activity; transferase activity; protein serine/threonine kinase activity; activin receptor activity, type I; growth factor binding; transferase activity, transferring phosphorus-containing groups; activin binding; kinase activity; SMAD binding; ATP binding; receptor signaling protein serine/threonine kinase activity
Biological Process: transforming growth factor beta receptor complex assembly; response to dietary excess; trophectodermal cell proliferation; in utero embryonic development; apoptosis; positive regulation of apoptosis; activin receptor signaling pathway; positive regulation of caspase activity; protein amino acid phosphorylation; negative regulation of insulin secretion; response to insulin stimulus; regulation of apoptosis; sequestering of lipid; apoptotic nuclear changes; transmembrane receptor protein serine/threonine kinase signaling pathway; response to glucose stimulus; cell differentiation; determination of left/right symmetry; phosphorylation
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