Name :
Recombinant Human Carboxypeptidase A2 Protein (His Tag)
Biological Activity :
Background :
Carboxypeptidase A2 ( CPA2 ) is a secreted pancreatic procarboxy -peptidase, and cleaves the C-terminal amide or ester bond of peptides that have a free C-terminal carboxyl group. The hydrolytic action of CPA2 was identified with a preference towards long substrates with aromatic amino acids in their C-terminal end, particularly tryptophan. CPA2 comprises a signal peptide, a pro region and a mature chain, and can be activated after cleavage of the pro peptide. Three different forms of human pancreatic proCarboxypeptidase A have been isolated, and the A1 and A2 forms are always secreted as monomeric proteins with different biochemical properties.
Biological Activity :
Measured by its ability to cleave a colorimetric peptide substrate, N-acetyl-Phe-Thiaphe-OH (N-Ac-PSP, Peptide International’s Catalog# STP-3621-PI), in the presence of 5,5’Dithio-bis (2-nitrobenzoic acid) (DTNB), as measured using the wavelength at 405 nm and the extinction coefficient of 13,260 M-1 cm-1. The specific activity is >4,000 pmoles/min/μg
.
Expression Host :
Human
Source :
HEK293 Cells
Tag :
Protein Accession No. :
NP_001859.1
NCBI Gene ID :
Synonyms :
Synonyms :
Carboxypeptidase A2
Amino Acid Sequence :
Molecular Weight :
The secreted recombinant human CPA2 existing as the proform consists of 412 amino acids and has a predicted molecular mass of 46 kDa also as estimated by SDS-PAGE under reducing conditions.
Purity :
> 90 % 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 :
A DNA sequence encoding the pre pro form of human CPA2 (NP_001859.1) (Met 1-Tyr 417) was expressed with a C-terminal polyhistidine tag.
Buffer Solution :
Lyophilized from sterile 25mM Tris, 0.15mM NaCl, pH 7.4Please 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 :
CPA2 Protein, Human Carboxypeptidase A2 背景信息 Carboxypeptidase A2 ( CPA2 ) is a secreted pancreatic procarboxy -peptidase, and cleaves the C-terminal amide or ester bond of peptides that have a free C-terminal carboxyl group. The hydrolytic action of CPA2 was identified with a preference towards long substrates with aromatic amino acids in their C-terminal end, particularly tryptophan. CPA2 comprises a signal peptide, a pro region and a mature chain, and can be activated after cleavage of the pro peptide. Three different forms of human pancreatic proCarboxypeptidase A have been isolated, and the A1 and A2 forms are always secreted as monomeric proteins with different biochemical properties.
References & Citations :
Catasus, L. et al., 1995. J. Biol. Chem. 270: 6651-6657. Aloy, P. et al., 1998, Biol. Chem. 379: 149-155. Laethem, RM. et al., 1996, Arch. Biochem. Biophys.332: 8-18.
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