Purity
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Level
<1.0 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its binding ability in a functional ELISA. When rhBMP-4 is coated at 1 μg/mL, rhRGM-A binds with an apparent K D <50nM. Immobilized rhRGM-A can bind rmNeogenin/Fc Chimera with a linear range of
10-500 ng/mL.Source
Mouse myeloma cell line, NS0-derived Cys48-Gly422 & Pro169-Gly422, both with a C-terminal 6-His tag
Accession #
N-terminal Sequence
AnalysisCys48 & Pro169
Predicted Molecular Mass
42.4 kDa
SDS-PAGE
Multiple bands between 25-37 kDa, reducing conditions
2459-RM |
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Formulation Lyophilized from a 0.2 μm filtered solution in PBS. | ||
Reconstitution Reconstitute at 100 μg/mL in sterile PBS. | ||
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. | ||
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
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Background: RGM-A
Human Repulsive Guidance molecule (RGM) is a 33 kDa GPI-linked member of an expanding RGM-related family of neuronal and muscle-expressed membrane proteins (1). It is synthesized as a 450 amino acid (aa) preproprotein that contains a 47 aa signal sequence, a 121 aa N-terminal prosegment, a 256 mature region and a 26 aa C-terminal prosegment (2). The N-terminal prosegment contains an RGD tripeptide and the molecule’s only two potential N-linked glycosylation sites. The mature segment shows an abbreviated von Willebrand factor domain. Proteolytic processing occurs at an aspartic acid-proline bond, creating a predicted 32 kDa mature region (2). The mature region of human RGM-A has 88% and 93% aa identity to the chick and mouse mature region of RGM-A, respectively. When compared to human RGMb and c, the mature region of human RGM-A shows 58% and 54% aa identity, respectively. Recombinant chick RGM-A has been reported to induce collapse of temporal but not nasal growth cones, and to repel temporal retinal axons in vitro. This suggests a role in the development of the retina-superior colliculus connection. In mammals, however, this activity is not so evident, and thus its function in this system is uncertain (3). Alternatively, in mice, RGM-A is said to be needed for neural tube closure, and may play a role in entorhinal-hippocampal connections (3, 4). The receptor for RGM-A is reported to be neogenin (5, 6). RGM-A has also been shown to be a bone morphogenic protein co-receptor, able to bind both BMP-2 and BMP-4 (7).
References:
Samad, T.A. et al. (2004) J. Neurosci. 24:2027.
Monnier P. et al. (2002) Nature 419:392.
Niederkofler V. et al. (2004) J. Neurosci. 24:808.
Brinks, H. et al. (2004) J. Neurosci. 24:3862.
Rajagopalan S. et al. (2004) Nat. Cell Biol. 6:756.
Matsunaga E. et al. (2004) Nat. Cell Biol. 6:749.
Babitt J.L. et al. (2005) J. Biol. Chem. 280(33):29820.
Long Name:
Repulsive Guidance Molecule A
Entrez Gene IDs:
56963 (Human); 244058 (Mouse)
Alternate Names:
RGM domain family member A; RGM domain family, member A; RGMA; RGM-A; RGMrepulsive guidance molecule A
