On ligand binding, forms a receptor complex consisting of two type II and two type I transmembrane serine/threonine kinases. Type II receptors phosphorylate and activate type I receptors which autophosphorylate, then bind and activate SMAD transcriptional regulators. Receptor for activin. May be involved for left-right pattern formation during embryogenesis. Interacts with FKBP1A. Interacts with FCHO1. Expressed in normal parenchymal cells, endothelial cells, fibroblasts and tumor-derived epithelial cells. Belongs to the protein kinase superfamily. TKL Ser/Thr protein kinase family. TGFB receptor subfamily. Note: This description may include information from UniProtKB.
Protein type: Protein kinase, TKL; Kinase, protein; Protein kinase, Ser/Thr (receptor); Membrane protein, integral; EC 184.108.40.206; TKL group; STKR family; Type1 subfamily
Cellular Component: apical part of cell; integral to plasma membrane; activin receptor complex
Molecular Function: protein serine/threonine kinase activity; protein binding; protein homodimerization activity; activin receptor activity, type I; transforming growth factor beta binding; transforming growth factor beta receptor activity, type I; peptide hormone binding; metal ion binding; activin binding; SMAD binding; ATP binding; transmembrane receptor protein serine/threonine kinase activity; receptor signaling protein serine/threonine kinase activity; protein kinase activity
Biological Process: pharyngeal system development; in utero embryonic development; positive regulation of transcription, DNA-dependent; peptidyl-threonine phosphorylation; activin receptor signaling pathway; gastrulation with mouth forming second; positive regulation of bone mineralization; protein amino acid phosphorylation; germ cell development; negative regulation of signal transduction; patterning of blood vessels; BMP signaling pathway; positive regulation of osteoblast differentiation; negative regulation of activin receptor signaling pathway; mesoderm formation; transforming growth factor beta receptor signaling pathway; smooth muscle cell differentiation; regulation of skeletal muscle development; positive regulation of transcription from RNA polymerase II promoter; determination of left/right symmetry; regulation of ossification; neural crest cell migration; urogenital system development; acute inflammatory response; G1/S transition of mitotic cell cycle
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.