Recombinant Human ACVR2B, Fc-tagged therapeutic protein(Luspatercept)

• Cat.No.: ACVR2B-P014H
• Product Overview: Recombinant Human activin receptor type IIB, Fc-tagged therapeutic protein is an investigational therapeutic protein that increases red blood cell (RBC) levels by targeting molecules in the TGF-β superfamily. It contains a modified activin receptor type IIB linked to the Fc protein of human immunoglobulin 1 (IgG1) that acts as a ligand trap for members in the Transforming Growth Factor-Beta (TGF-β) superfamily involved in the late stages of erythropoiesis (red blood cell production). It regulates late-stage erythrocyte (red blood cell) precursor cell differentiation and maturation. This mechanism of action is distinct from that of erythropoietin (EPO), which stimulates the proliferation of early-stage erythrocyte precursor cells.

Specification

• Species: Human
• Source: CHO
• Tag: Fc
• Description: 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.
• Endotoxin: < 0.1 EU per μg of the protein
• Purity: >96%
• Alias: ACVR2B; ActR IIB; HTX4; ACTRIIB; ActR-IIB; Luspatercept
• Publications:
  Detection of Sotatercept (ACE-011) in human serum by SAR-PAGE and Western Single Blotting. (2017)
  Antibody-based strategies for the detection of Luspatercept (ACE-536) in human serum (2017)
  Combined detection of the ActRII‐Fc fusion proteins Sotatercept (ActRIIA‐Fc) and Luspatercept (modified ActRIIB‐Fc) in serum by means of immunoaffinity purification, tryptic digestion, and LC‐MS/MS (2018)
  Updated protocols for the detection of Sotatercept and Luspatercept in human serum (2018)
  Development of two complementary LC–HRMS methods for analyzing sotatercept in dried blood spots for doping controls (2019)

Gene Information

• Gene Name: ACVR2B activin A receptor, type IIB [ Homo sapiens ]
• Official Symbol: ACVR2B
• Synonyms: ACVR2B; activin A receptor, type IIB; activin receptor type-2B; ActR IIB; HTX4; ACTRIIB; ActR-IIB
• Gene ID: 93
• mRNA Refseq: NM_001106
• Protein Refseq: NP_001097
• MIM: 602730
• UniProt ID: Q13705
• Chromosome Location: 3p22
• Pathway: Cytokine-cytokine receptor interaction, organism-specific biosystem; Cytokine-cytokine receptor interaction, conserved biosystem; Developmental Biology, organism-specific biosystem; Regulation of Signaling by NODAL, organism-specific biosystem; Signal Transduction, organism-specific biosystem; Signaling by BMP, organism-specific biosystem; Signaling by NODAL, organism-specific biosystem
• Function: ATP binding; activin binding; activin receptor activity, type II; contributes_to activin receptor activity, type II; growth factor binding; inhibin beta-A binding; inhibin beta-B binding; metal ion binding; nucleotide binding; protein binding; protein serine/threonine kinase activity; protein serine/threonine kinase activity; protein serine/threonine/tyrosine kinase activity; receptor activity; receptor signaling protein serine/threonine kinase activity; transforming growth factor beta-activated receptor activity; transmembrane receptor protein serine/threonine kinase activity