Name :
Recombinant Human Cystatin F/CST7 Protein
Biological Activity :
Background :
The cystatin superfamily members are important natural cysteine protease inhibitors present in a wide variety of organisms and are divided into three classes. Cystatin F, also known as leukocystatin and CMAP (Cystatin-like Metastasis-Associated Protein), is a type 2 cystatin and its expression is limited to hematopoietic cells, with the highest expression levels being observed in monocytes, dendritic cells, and certain types of T-cells. Furthermore, Cystatin F mRNA becomes up-regulated during dendritic cell maturation, and thus suggests a specific role of Cystatin F in immune regulation. Cystatin F is produced as a dimer, an inactive cathepsin inhibitor which is activated by chemical reduction. In addition, Cystatin F and its homologues have been observed expressing in various human cancer cell lines established from malignant tumors, and thus indicates a new diagnosis and prevention approach of certain human carcinomas metastasis.
Biological Activity :
Testing in progress
Expression Host :
Human
Source :
HEK293 Cells
Tag :
Protein Accession No. :
NP_003641.3
NCBI Gene ID :
Synonyms :
Synonyms :
Cystatin F (leukocystatin)
Amino Acid Sequence :
Molecular Weight :
The recombinant human Cystatin F consists of 132 amino acids and predicts a molecular mass of 15.2 kDa. As a result of glycosylation, the apparent molecular mass of rhCystatin F is approximately 25 kDa in SDS-PAGE.
Purity :
> 95 % as determined by SDS-PAGE
State of Matter :
Product Concentration :
Storage and Stability :
Samples are stable for up to twelve months from date of receipt at -20℃ to -80℃. Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Endotoxin Level :
< 1.0 EU per μg of the protein as determined by the LAL method
Protein Construction :
The mature form of the human Cystatin F (NP_003641.3) (Met 1-His 145) with five amino acids (DDDDK) at the C-terminus was expressed and purified.
Buffer Solution :
Lyophilized from sterile 50mM Tris, 100mM NaCl, pH 8.0Please contact us for any concerns or special requirements. Normally 5 % – 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. Please refer to the specific buffer information in the hardcopy of datasheet.
Shipping :
In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Redissolution :
A hardcopy of datasheet with reconstitution instructions is sent along with the products. Please refer to it for detailed information.
Synonyms :
CMAP Protein, Human Cystatin F/CST7 背景信息 The cystatin superfamily members are important natural cysteine protease inhibitors present in a wide variety of organisms and are divided into three classes. Cystatin F, also known as leukocystatin and CMAP (Cystatin-like Metastasis-Associated Protein), is a type 2 cystatin and its expression is limited to hematopoietic cells, with the highest expression levels being observed in monocytes, dendritic cells, and certain types of T-cells. Furthermore, Cystatin F mRNA becomes up-regulated during dendritic cell maturation, and thus suggests a specific role of Cystatin F in immune regulation. Cystatin F is produced as a dimer, an inactive cathepsin inhibitor which is activated by chemical reduction. In addition, Cystatin F and its homologues have been observed expressing in various human cancer cell lines established from malignant tumors, and thus indicates a new diagnosis and prevention approach of certain human carcinomas metastasis.
References & Citations :
Halfon S., et al.,(1998), Leukocystatin, a new class II cystatin expressed selectively by hematopoietic cells. J. Biol. Chem. 273:16400-16408.Ni J., et al., (1998), Cystatin F is a glycosylated human low molecular weight cysteine proteinase inhibitor.J. Biol. Chem. 273:24797-24804.Morita M., et al.,(2000), Genomic construct and mapping of the gene for CMAP (leukocystatin/Cystatin F, CST7) and identification of a proximal novel gene, BSCv (C20orf3).Genomics 67:87-91.
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