In the presence of Recombinant Human Agrin (6624-AG), immobilized Recombinant Human MuSK Fc Chimera (2 µg/mL, 100 µL/well) binds Recombinant Human LRP-4 (5948-LR) with an ED50 of 5-50 ng/mL.
Recombinant Human MuSK Fc Chimera Protein, CF Summary
Details of Functionality
Measured by its binding ability in a functional ELISA. In the presence of
Recombinant
Human Agrin (Catalog # 6624-AG), immobilized Recombinant Human MuSK Fc Chimera (2 µg/mL at 100 µL/well) binds
Recombinant Human LRP-4 (Catalog # 5948-LR)
with an ED50 of 5-50 ng/mL.
Source
Human embryonic kidney cell, HEK293-derived human MuSK protein
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Note
<0.10 EU per 1 μg of the protein by the LAL method.
Applications/Dilutions
Dilutions
Bioactivity
Theoretical MW
78 kDa. 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
86-103 kDa, reducing conditions
Publications
Read Publication using 9810-MK in the following applications:
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 visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Reconstitution Instructions
Reconstitute at 500 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 MuSK Fc Chimera Protein, CF
EC 2.7.10
EC 2.7.10.1
MGC126323
MGC126324
muscle, skeletal, receptor tyrosine kinase
MuSK
skeletal receptor tyrosine-protein kinase
Background
MuSK (muscle-specific kinase) is a 100 kDa type I transmembrane (TM)
protein belonging to the receptor tyrosine kinase family (1). It contains a 472 aa extracellular domain (ECD), a 21 aa transmembrane domain, and a 353 cytoplasmic domain (1). Within the ECD, Human MuSK shares 91% and 92% aa
sequence identity with mouse MuSK and rat MuSK, respectively. It is found in
the postsynaptic membrane of skeletal muscle motor endplates (2). Human MuSK
has multiple isoforms. One contains deletions at residues 307‑394 and 454‑461, while a second is a
short soluble form that contains residues 120‑209 plus a unique 24 aa C‑terminal tail (3). MuSK binds the heparin
sulfate proteoglycan agrin to promote acetylcholine receptor clustering. It has
also been found to bind with low-density lipoprotein receptor-related protein 4
(LRP4) (4), Wnt ligands (5), biglycan (6), and ColQ (7). Recent
studies have showed that MuSK does not bind agrin directly, but enhanced the
MuSK-LRP4 interaction (7, 8). When Agrin binds to the N-Terminal region of
LRP4, this promotes the association of LRP4 and MuSK, which then stimulates
MuSK kinase activity (9, 10).
Valenzuela, D.M. et al. (1995) Neuron. 15:573.
Finn, A.J. et al. (2003) Nat. Neurosci. 6:717.
Nasrin, F. et al. (2014) Sci. Rep. 4:6841.
Kim, N. et al. (2008) Cell 135:334.
Banerjee, S. et al. (2011) Development 138:3287.
Amenta, A.R. et al. (2012) J Neurosci 32:2324.
Otsuka, K. et al (2015) Scientific Reports. 5:13928.
Zhang, B. et al. (2008) Neuron 60:285.
Zhang, W. et al. (2011) J Biol Chem. 286(47):40624.
Burden, S.J. et al. (2017) CSH Perspectives Biol. 5:a009167.
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