Activins are dimeric growth and differentiation factors which belong to the transforming growth factor-beta (TGF-beta) superfamily of structurally related signaling proteins. Activins signal through a heteromeric complex of receptor serine kinases which include at least two type I ( I and IB) and two type II (II and IIB) receptors. These receptors are all transmembrane proteins, composed of a ligand-binding extracellular domain with cysteine-rich region, a transmembrane domain, and a cytoplasmic domain with predicted serine/threonine specificity. Type I receptors are essential for signaling; and type II receptors are required for binding ligands and for expression of type I receptors. Type I and II receptors form a stable complex after ligand binding, resulting in phosphorylation of type I receptors by type II receptors. This gene encodes activin A type I receptor which signals a particular transcriptional response in concert with activin type II receptors. Mutations in this gene are associated with fibrodysplasia ossificans progressive.
Aliases : FOP; ALK2; SKR1; TSRI; ACTRI; ACVR1A; ACVRLK2
Entrez GeneID : 90
Swissprot: Q04771
WB Predicted band size: 57.2kDa
Host/Isotype: Mouse IgG1
Species Reactivity : Human
Immunogen: Purified recombinant fragment of human ACVR1 (AA: 21-120) expressed in E. Coli.
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