Recombinant Human Activin RIIA Fc Chimera (CHO) Protein, CF Summary
Details of Functionality |
Measured by its ability to inhibit Activin A-induced hemoglobin expression in K562 human chronic myelogenous leukemia cells. Schwall, R.H. et al. (1991) Method Enzymol. 198:340. Approximately 0.01-0.05 μg/mL of Recombinant Human (rh) Activin RIIA Fc Chimera will inhibit 50% of the biological response due to 3 ng/mL of rhActivin A. |
Source |
Chinese Hamster Ovary cell line, CHO-derived human Activin RIIA protein
Human Activin RIIA (Met1 - Pro134) Accession # P27037 |
IEGRMD |
Human IgG1 (Pro100 - Lys330) |
N-terminus |
|
C-terminus |
|
|
Accession # |
|
N-terminal Sequence |
Ala20 |
Structure / Form |
Disulfide-linked homodimer |
Protein/Peptide Type |
Recombinant Proteins |
Gene |
ACVR2A |
Purity |
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain |
Endotoxin Note |
<0.01 EU per 1 μg of the protein by the LAL method. |
Applications/Dilutions
Dilutions |
|
Theoretical MW |
40 kDa (monomer). Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors. |
SDS-PAGE |
60-67 kDa, reducing conditions |
Packaging, Storage & Formulations
Storage |
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 3 months, -20 to -70 °C under sterile conditions after reconstitution.
|
Buffer |
Lyophilized from a 0.2 μm filtered solution in PBS. |
Purity |
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain |
Reconstitution Instructions |
Reconstitute at 100 μg/mL in PBS. |
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Recombinant Human Activin RIIA Fc Chimera (CHO) Protein, CF
Background
Activin proteins are involved in a wide range of biological processes including mesoderm induction, neural cell differentiation, bone remodeling, hematopoiesis, the regulation of reproductive physiology, inflammation, and carcinogenesis (1 ‑ 3). They function through heteromeric complexes of type I and type II serine/threonine kinase receptors (2, 4). Dimeric ligands bind to a type II receptor, such as Activin Receptor IIA (ActRIIA), which then associates with a type I receptor to initiate signal transduction (4). ActRIIA mediates the pleiotropic effects of Activins and Inhibins as well as several members of the BMP and GDF families of TGF-beta like proteins (4). Mature human ActRIIA is a 70 kDa glycoprotein that consists of a 116 amino acid (aa) extracellular domain (ECD), a 26 aa transmembrane segment, and a 352 aa cytoplasmic region that includes the kinase domain and a PDZ-binding motif (5). Within the ECD, human ActRIIA shares 98% aa sequence identity with mouse and rat ActRIIA. Signaling through ActRIIA is modulated by its interaction with RGM-B/DRAGON, Cripto, Endoglin/CD105, TGF‑ beta RIII/Betaglycan, or BAMBI (6 - 10). These interactions can enhance ligand‑induced signaling or interfere with signaling by preventing ActRIIA association with type I receptors (6 - 9). Activin‑induced responses can also be limited by the enhanced internalization of ActRIIA following its association with the cytoplasmic protein ARIP2 (11).
- Welt, C. et al. (2002) Exp. Biol. Med. 227:724.
- Chen, Y.-G. et al. (2006) Exp. Biol. Med. 231:534.
- Werner, S. and C. Alzheimer (2006) Cytokine Growth Factor Rev. 17:157.
- de Caestecker, M. (2004) Cytokine Growth Factor Rev. 15:1.
- Matzuk, M.M. and A. Bradley (1992) Biochim. Biophys Acta 1130:105.
- Samad, T.A. et al. (2005) J. Biol. Chem. 280:14122.
- Gray, P.C. et al. (2003) Proc. Natl. Acad. Sci. 100:5193.
- Lewis, K.A. et al. (2000) Nature 404:411.
- Onichtchouk, D. et al. (1999) Nature 401:480.
- Barbara, N.P. et al. (1999) J. Biol. Chem. 274:584.
- Matsuzaki, T. et al. (2002) J. Biol. Chem. 277:19008.
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