Carboxypeptidase B2/CPB2 Protein, Human (HEK293, His)

Carboxypeptidase B2 Protein, Human (HEK293, His) is an approximately 47.0 kDa human carboxypeptidase B2 with a His-flag. Carboxypeptidase B2 is a enzyme belonging to the peptidase M14 family and hydrolyze C-terminal peptide bonds^[1].

Carboxypeptidase B2 is a secreted glycoprotein member of the peptidase M14 family of enzymes. It is expressed by hepatocytes and platelets, with MW differences attributable to glycosylation. CPB2 can be cleaved by thrombin and plasmin, generating a relatively insoluble nonglycosylated enzymatically active fragment (TAFIa). Active CPB2 removes C-terminal Lys residues from fibrin, thereby interrupting plasmin generation and promoting fibrin polymerization.
Human CPB2 proprecursor is 401 amino acids (aa) in length. It contains a prosequence (aa 23-114) and an active fragment (aa 115-423) that acts on C-terminal Lys or Arg residues^[1][2].

The enzyme activity of this recombinant protein is testing in progress, we cannot offer a guarantee yet.

Human

HEK293

C-6*His

Q96IY4 (F23-V423)

1361  [NCBI]

Full Length of Mature Protein

FQSGQVLAALPRTSRQVQVLQNLTTTYEIVLWQPVTADLIVKKKQVHFFVNASDVDNVKAHLNVSGIPCSVLLADVEDLIQQQISNDTVSPRASASYYEQYHSLNEIYSWIEFITERHPDMLTKIHIGSSFEKYPLYVLKVSGKEQAAKNAIWIDCGIHAREWISPAFCLWFIGHITQFYGIIGQYTNLLRLVDFYVMPVVNVDGYDYSWKKNRMWRKNRSFYANNHCIGTDLNRNFASKHWCEEGASSSSCSETYCGLYPESEPEVKAVASFLRRNINQIKAYISMHSYSQHIVFPYSYTRSKSKDHEELSLVASEAVRAIEKISKNTRYTHGHGSETLYLAPGGGDDWIYDLGIKYSFTIELRDTGTYGFLLPERYIKPTCREAFAAVSKIAWHVIRNV

Approximately 58.0 kDa

≥ 95%, as determined by reducing SDS-PAGE.

Solution

1.Supplied as a 0.22 μm filtered solution of 20 mM Tris-HCl, 150 mM NaCl, 1 mM ZnCl₂, 10% glycerol, pH 8.0.
Note: For SPR assay, please replace the buffer. Primary amine components (e.g., Tris, imidazole) can affect protein-coupled chips.

<1 EU/μg, determined by LAL method.

Stored at -80°C for 1 year from date of receipt. It is stable at -20°C for 3 months after opening. It is recommended to freeze aliquots at -80°C for extended storage. Avoid repeated freeze-thaw cycles.

Shipping with dry ice.

• [1]. D Leenaerts, et al. Carboxypeptidase U (CPU, carboxypeptidase B2, activated thrombin-activatable fibrinolysis inhibitor) inhibition stimulates the fibrinolytic rate in different in vitro models. J Thromb Haemost. 2018 Oct;16(10):2057-2069.  [Content Brief]

  [2]. D Leenaerts, et al. Plasma levels of carboxypeptidase U (CPU, CPB2 or TAFIa) are elevated in patients with acute myocardial infarction. J Thromb Haemost. 2015 Dec;13(12):2227-32.  [Content Brief]