ALK2: 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.
Protein type: Protein kinase, TKL; EC 2.7.11.30; Protein kinase, Ser/Thr (receptor); Membrane protein, integral; Kinase, protein; TKL group; STKR family; Type1 subfamily
Cellular Component: activin receptor complex; apical part of cell; integral to plasma membrane
Molecular Function: activin binding; activin receptor activity, type I; ATP binding; growth factor binding; protein binding; protein homodimerization activity; protein kinase activity; protein serine/threonine kinase activity; receptor signaling protein serine/threonine kinase activity; SMAD binding; transforming growth factor beta binding; transforming growth factor beta receptor activity, type I
Biological Process: activin receptor signaling pathway; BMP signaling pathway; determination of left/right symmetry; embryonic development; G1/S transition of mitotic cell cycle; gastrulation; gastrulation with mouth forming second; germ cell development; heart development; in utero embryonic development; mesoderm development; mesoderm formation; negative regulation of activin receptor signaling pathway; negative regulation of signal transduction; neural crest cell migration; patterning of blood vessels; peptidyl-threonine phosphorylation; pharyngeal system development; positive regulation of bone mineralization; positive regulation of cell migration; positive regulation of osteoblast differentiation; positive regulation of transcription from RNA polymerase II promoter; positive regulation of transcription, DNA-dependent; protein amino acid phosphorylation; regulation of ossification; smooth muscle cell differentiation; transforming growth factor beta receptor signaling pathway; urogenital system development
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