Myostatin Human E. coli
Myostatin (GDF 8) is expressed uniquely in human skeletal muscle as a 12 kDa mature glycoprotein consisting of 109 amino acid residues and secreted into plasma. Myostatin is a member of the transforming growth factor β superfamily of secreted growth and differentiation factors that is essential for proper regulation of skeletal muscle mass. Studies have shown that myostatin could play an important role in cardiac development and physiology. In serum, myostatin circulates as part of a latent complex containing myostatin propeptide and/or follistatin-related gene. The myostatin propeptide is known to bind and inhibit myostatin in vitro. This interaction is relevant in vivo, with a majority (>70%) of myostatin in serum bound to its propeptide. The myostatin propeptide is negative regulator of myostatin in vivo.
Type
Recombinant
Description
Total 152AA, MW: 16.7 kDa (calculated). N-terminal His-tag including the spacer 43AA (highlighted). The AA sequence of the human myostatin part of the fusion protein is corresponding to the UniProtKB/Swiss-Prot entry O14793, AA267–375.
Source
E. coli
Purity
Purity as determined by densitometric image analysis: >95%
SDS-PAGE Gel
12% SDS-PAGE separation of Human Myostatin
1. M.W. marker – 14, 21, 31, 45, 66, 97 kDa
2. reduced and heated sample, 10μg/lane
3. non-reduced and non-heated sample, 10μg/lane
Endotoxin
< 1.0 EU/ug
Formulation
Filtered (0,4 μm) and lyophilized from 0.5 mg/mL in 0.05 M acetate buffer, pH 4.5
Reconstitution
Add 0.1M Acetate buffer pH4 to prepare a working stock solution of approximately 0.5 mg/mL and let the lyophilized pellet dissolve completely. For conversion into higher pH value, we recommend intensive dilution by relevant buffer to a concentration of 10μg/mL. In higher concentrations the solubility of this antigen is limited. Product is not sterile! Please filter the product by an appropriate sterile filter before using it in the cell culture.
Applications
Western blotting, ELISA
Shipping
At ambient temperature. Upon receipt, store the product at the temperature recommended below.
Storage/Expiration
Store the lyophilized protein at –80 °C. Lyophilized protein remains stable until the expiry date when stored at –80 °C. Aliquot reconstituted protein to avoid repeated freezing/thawing cycles and store at –80 °C for long term storage. Reconstituted protein can be stored at 4 °C for a week.
Quality Control Test
BCA to determine quantity of the protein.
SDS PAGE to determine purity of the protein.
LAL to determine quantity of endotoxin.
– Artaza JN, Bhasin S, Magee TR, Reisz-Porszasz S, Shen R, Groome NP, Meerasahib MF, Gonzales-Cadavid NF. Myostatin inhibits myogenesis and promotes adipogenesis in C3H 10T(1/2) mesenchymal multipotent cells. Endocrinology . Aug;146(8):3547-57 (2005)
– Matsakas A, Bozzo C, Cacciani N, Caliaro F, Reggiani C, Mascarello F, Patruno M. Effect of swimming on myostatin expression in white and red gastrocnemius muscle and in cardiac muscle of rats. Exp Physiol . Nov;91(6):983-94 (2006)
– Ramazanov Z, Jimenez del Rio M, Ziegenfuss T. Sulfated polysaccharides of brown seaweed Cystoseira canariensis bind to serum myostatin protein. Acta Physiol Pharmacol Bulg 27(2-3) . 101-106 (2003)