Recombinant Human Cystatin B/CSTB Protein (His Tag)(Active) | PKSH031609

Recombinant Human Cystatin B/CSTB Protein (His Tag)(Active) | PKSH031609 | Gentaur US, UK & Europe Disrtribition

Synonyms: CST6;EPM1;EPM1A;PME;STFB;ULD

Active Protein: Active protein

Activity: A DNA sequence encoding the human CSTB (P04080) (Met 2-Phe 98) was expressed, with a polyhistide tag at the N-terminus.

Protein Construction: A DNA sequence encoding the human CSTB (P04080) (Met 2-Phe 98) was expressed, with a polyhistide tag at the N-terminus.

Fusion Tag: N-His

Species: Human

Expressed Host: E.coli

Shipping: This product is provided as lyophilized powder which is shipped with ice packs.

Purity: > 95 % as determined by reducing SDS-PAGE.

Endotoxin: Please contact us for more information.

Stability and Storage: Generally, lyophilized proteins are stable for up to 12 months when stored at -20 to -80℃. Reconstituted protein solution can be stored at 4-8℃ for 2-7 days. Aliquots of reconstituted samples are stable at < -20℃ for 3 months.

Molecular Mass: 12.5 kDa

Formulation: Lyophilized from sterile 50mM Tris, 50mM NaCl, pH 8.0

Reconstitution: Please refer to the printed manual for detailed information.

Background: Cystatin-B, also known as CPI-B, Liver thiol proteinase inhibitor, Stefin-B, CSTB and CST6, is a cytoplasm and nucleus protein which belongs to the cystatin family. Cystatin-B / CSTB is an intracellular thiol proteinase inhibitor. Tightly binding reversible inhibitor of cathepsins L, H and B. Cystatin-B / CSTB is able to form a dimer stabilized by noncovalent forces, inhibiting papain and cathepsins l, h and b. Cystatin-B / CSTB is also thought to play a role in protecting against the proteases leaking from lysosomes. Defects in Cystatin-B / CSTB are the cause of progressive myoclonic epilepsy type 1 (EPM1) which is an autosomal recessive disorder characterized by severe, stimulus-sensitive myoclonus and tonic-clonic seizures. The cystatins are a family of cysteine protease inhibitors with homology to chicken cystatin. Cystatins are physiological inhibitors of cysteine proteinases which are widely distributed in human tissues and fluids. Cystatins typically comprise about 115 amino acids, are largely acidic, contain four conserved cysteine residues known to form two disulfide bonds. Cystatins may be glycosylated and / or phosphorylated, with similarity to fetuins, kininogens, stefins, histidine-rich glycoproteins and cystatin-related proteins. Some of the members are active cysteine protease inhibitors, while others have lost or perhaps never acquired inhibitory activity. Cystatins mainly inhibit peptidases belonging to peptidase families C1 (papain family) and C13 (legumain family).

Research Area: Cell biology