Recombinant Human MuSK Fc Chimera Protein, CF

R&D Systems, part of Bio-Techne | Catalog # 9810-MK

R&D Systems, part of Bio-Techne
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9810-MK-050
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Key Product Details

Source

HEK293

Accession #

O15146-1

Structure / Form

Disulfide-linked homodimer

Conjugate

Unconjugated

Applications

Bioactivity

View all MuSK Proteins and Enzymes »

Product Specifications

Source

Human embryonic kidney cell, HEK293-derived human MuSK protein
Human MuSK
(Leu24-Thr495)
Accession # O15146-1
 IEGRMD Human IgG1
(Pro100-Lys330)
N-terminus C-terminus

Purity

>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.

Endotoxin Level

<0.10 EU per 1 μg of the protein by the LAL method.

N-terminal Sequence Analysis

Leu24

Predicted Molecular Mass

78 kDa

SDS-PAGE

86-103 kDa, reducing conditions

Activity

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.

Scientific Data Images for Recombinant Human MuSK Fc Chimera Protein, CF

Recombinant Human MuSK Fc Chimera Protein Binding Activity.

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.

Formulation, Preparation and Storage

9810-MK
Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution
Reconstitute at 500 μg/mL in PBS.

Reconstitution Buffer Available:
Size / Price
Qty
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.
  • 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.

Background: MuSK

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).

References

  1. Valenzuela, D.M. et al. (1995) Neuron. 15:573.
  2. Finn, A.J. et al. (2003) Nat. Neurosci. 6:717.
  3. Nasrin, F. et al. (2014) Sci. Rep. 4:6841.
  4. Kim, N. et al. (2008) Cell 135:334.
  5. Banerjee, S. et al. (2011) Development 138:3287.
  6. Amenta, A.R. et al. (2012) J Neurosci 32:2324.
  7. Otsuka, K. et al (2015) Scientific Reports. 5:13928.
  8. Zhang, B. et al. (2008) Neuron 60:285.
  9. Zhang, W. et al. (2011) J Biol Chem. 286(47):40624.
  10. Burden, S.J. et al. (2017) CSH Perspectives Biol. 5:a009167.

Long Name

Muscle-specific Receptor Tyrosine Kinase

Alternate Names

EC 2.7.10, EC 2.7.10.1, MGC126323, MGC126324, muscle, skeletal, receptor tyrosine kinase, MuSK, skeletal receptor tyrosine-protein kinase

Entrez Gene IDs

4593 (Human); 18198 (Mouse); 81725 (Rat); 102127677 (Cynomolgus Monkey)

Gene Symbol

MUSK

UniProt

O15146-1

Additional MuSK Products

Product Documents for Recombinant Human MuSK Fc Chimera Protein, CF

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Product Specific Notices for Recombinant Human MuSK Fc Chimera Protein, CF

For research use only

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