ACVR2B

Also known as ACTRIIB, ActR-IIB, HTX4, activin A receptor type 2B

Activin receptor type-2B is a protein that in humans is encoded by the ACVR2B gene. ACVR2B is an activin type 2 receptor.

Gene data

ACVR2B

Name: activin A receptor type 2B
Type: protein-coding
Position: 38,453,890–38,493,142 (+)
Aliases: ACTRIIB, ActR-IIB, HTX4
Ensembl: ENSG00000114739
RefSeq RNA: NM_001106.4, XM_005265583.4, XM_017007514.2, XM_017007515.3, XM_017007516.2
RefSeq protein: NP_001097.2, XP_005265640.1, XP_016863003.1, XP_016863004.1, XP_016863005.1

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. Type II receptors are considered to be constitutively active kinases. This gene encodes activin A type IIB receptor, which displays a 3- to 4-fold higher affinity for the ligand than activin A type II receptor. [provided by RefSeq, Jul 2008].