CPB2 / Carboxypeptidase-B2 단백질(Protein) (His Tag)

Carboxypeptidase-B2 / CPB2 Protein

Carboxypeptidase-B2 / CPB2 Protein Product Information

• Synonym: CPU, PCPB, TAFI
• Protein Construction: A DNA sequence encoding the human CPB2 ( NP_001863.2 ) extracellular domain ( Met 1 - Val 423 ) was expressed, fused with a polyhistidine tag at the C-terminus
• Source: Human
• Expression Host: Human Cells

Carboxypeptidase-B2 / CPB2 Protein QC Testing

• Purity: > 97 % as determined by SDS-PAGE
• Endotoxin: < 1.0 EU per μg of the protein as determined by the LAL method
• Stability: Samples are stable for up to twelve months from date of receipt at -70℃
• Predicted N terminal: Phe 23
• Molecular Mass: The recombinant human CPB2 consists of 412 amino acids and predictes a molecular mass of 47.4 kDa. In SDS-PAGE under reducing conditions, the apparent molecular mass of rhCPB2 is approximately 45-50 kDa due to glycosylation
• Formulation: Lyophilized from sterile PBS , pH 7.4
  1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
  2. Please contact us for any concerns or special requirements.

• SDS-PAGE: CPB2 protein

Carboxypeptidase-B2 / CPB2 Protein Usage Guide

• Storage: Store it under sterile conditions at -70℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
• Reconstitution: A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.

Carboxypeptidase-B2 / CPB2 Protein Description

Carboxypeptidase B2, also known as Carboxypeptidase U, Thrombin-activable fibrinolysis inhibitor, Plasma carboxypeptidase B, CPB2, is a secreted protein which belongs to the peptidase M14 family. Carboxypeptidases are enzymes that hydrolyze C-terminal peptide bonds. The carboxypeptidase family includes metallo-, serine, and cysteine carboxypeptidases. According to their substrate specificity, these enzymes are referred to as carboxypeptidase A (cleaving aliphatic residues) or carboxypeptidase B (cleaving basic amino residues). CPB2 is activated by thrombin and acts on carboxypeptidase B substrates. After thrombin activation, the mature protein downregulates fibrinolysis. CPB2 is synthesized by the liver and circulates in the plasma as a plasminogen-bound zymogen. When it is activated by proteolysis at residue Arg92 by the thrombin / thrombomodulin complex. CPB2 cleaves C-terminal arginine or lysine residues from biologically active peptides such as kinins or anaphylatoxins in the circulation thereby regulating their activities. CPB2 exhibits carboxypeptidase activity and activated CPB2 reduces fibrinolysis by removing the fibrin C-terminal residues that are important for the binding and activation of plasminogen.

References

1. Eaton DL. et al.,1991, J Biol Chem.266 (32): 21833-8.
2. Boffa MB. et al.,1999, Biochemistry.38 (20): 6547-58.
3. Liu T., et al., 2005, J. Proteome Res. 4: 2070-80.
4. Valnickova Z. et al., 2006, Biochemistry 45:1525-35.
5. Chen R.et al., 2009, J. Proteome Res. 8: 651-61.