This gene encodes a type I cell-surface receptor for the TGF-beta superfamily of ligands. It shares with other type I receptors a high degree of similarity in serine-threonine kinase subdomains, a glycine- and serine-rich region (called the GS domain) preceding the kinase domain, and a short C-terminal tail. The encoded protein, sometimes termed ALK1, shares similar domain structures with other closely related ALK or activin receptor-like kinase proteins that form a subfamily of receptor serine/threonine kinases. Mutations in this gene are associated with hemorrhagic telangiectasia type 2, also known as Rendu-Osler-Weber syndrome 2. [provided by RefSeq, Jul 2008],ACVRLK1, ALK-1, ALK1, HHT, HHT2, ORW2, SKR3, TSR-I,Amino acid metabolism,Angiogenesis,Cancer,Cardiovascular,Cell Biology & Developmental Biology,Endocrine & Metabolism,Growth factors,Kinase,Signal Transduction,ACVRL1