SRP3045

Follistatin human

recombinant, expressed in E. coli, ≥98% (SDS-PAGE), ≥98% (HPLC), suitable for cell culture

• Synonym(s): FS, activins-binding protein
• NACRES: NA.32
• UNSPSC Code: 12352200
• Form: lyophilized
• Assay: ≥98% (HPLC), ≥98% (SDS-PAGE)
• Biological source: human
• Recombinant: expressed in E. coli
• Mol wt: 31.5 kDa

Properties

• biological source: human
• recombinant: expressed in E. coli
• assay: ≥98% (HPLC), ≥98% (SDS-PAGE)
• form: lyophilized
• potency: 0.1-0.4 μg/mL
• mol wt: 31.5 kDa
• packaging: pkg of 20 μg
• technique(s): cell culture | mammalian: suitable
• impurities: <1.0 EU/μg endotoxin, tested
• color: white to off-white
• suitability: suitable for molecular biology
• UniProt accession no.: P19883
• shipped in: wet ice
• storage temp.: −20°C
• Gene Information: human ... FST(10468)

Description

General description

Research area: Cell Signaling

Follistatin is expressed in the pituitary, ovaries, decidual cells of the endometrium, and in some other tissues. The gene is mapped to human chromosome 5q11.2. Recombinant human Follistatin is a 31.5kDa protein containing 288 amino acids. Its primary structure contains three cysteine-rich domains (called FS domains), each followed by a protease-inhibitory kazal domain.

Application

Follistatin human has been used to suppress myostatin signaling. It has also been used as an inhibitor of activin A.[1]

Biochem/physiol Actions

Follistatin is a multifunctional secreted protein that binds to ligands of the TGF (transforming growth factor)-β family and regulates their activity by inhibiting their access to signaling receptors. It was originally discovered as an activin antagonist whose activity suppresses expression and secretion of the pituitary hormone FSH (follicle-stimulating hormone). In addition to being a natural antagonist, follistatin can inhibit the activity of other TGF (transforming growth factor)-β ligands including BMP (bone morphogenetic protein)-2,-4,-6,-7, Myostatin, GDF-11 (growth differentiation factor 11), and TGF-b1. In gonads, it is responsible for oocyte competence and embryo development. In the pituitary gland, it causes cyclic changes in FSH production in the estrous cycle. Follistatin also participates in bone metabolism. It controls inflammation, fibrosis, and tissue repair. Levels of plasma follistatin increase in polycystic ovary syndrome and type 2 diabetes. Follistatin might also be involved in tumor progression, including apoptosis, angiogenesis, and metastasis.

Physical form

Lyophilized from 10 mM sodium phosphate, 50 mM sodium chloride, pH 7.5.

Preparation Note

Centrifuge the vial prior to opening. Reconstitute in water to a concentration of 0.1-1.0 mg/ml. Do not vortex. This solution can be stored at 2-8°C for up to 1 week. For extended storage, it is recommended to further dilute in a buffer containing a carrier protein (example 0.1% BSA) and store in working aliquots at -20°C to -80°C.

Other Notes

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Safety Information

• pictograms: GHS07
• signalword: Warning
• hcodes: H315,H319,H335
• pcodes: P261 - P264 - P271 - P280 - P302 + P352 - P305 + P351 + P338
• Hazard Classifications: Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
• target_organs: Respiratory system
• Storage Class: 13 - Non Combustible Solids
• wgk: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable