Compstatin

Compstatin, a 13-residue cyclic peptide, is a potent inhibitor of the complement system C3 with species specificity. Compstatin binds to baboon C3 and is resistant to proteolytic cleavage in baboon blood (similar to humans) . Compstatin inhibits only the activation of primates’ complement system. Compstatin exhibits IC50 values of 63 μM and 12 μM for classical and alterative complement pathway, respectively[1][2][3][4].

Product Specifications

CAS Number

[206645-99-0]

UNSPSC

12352209

Hazard Statement

H302, H315, H319, H335

Target

Complement System

Type

Peptides

Related Pathways

Immunology/Inflammation

Field of Research

Others

Assay Protocol

https://www.medchemexpress.com/Compstatin.html

Purity

99.58

Solubility

H2O : 100 mg/mL (ultrasonic)

Smiles

O=C([C@@H](N)[C@H](CC)C)N[C@H](C(N[C@H](C(N[C@H](C(N[C@H](C(N[C@H](C(N[C@H](C(NCC(N[C@H](C(N[C@H](C(N[C@H]1CCCNC(N)=N)=O)CC2=CNC=N2)=O)CC3=CNC=N3)=O)=O)CC4=CNC5=CC=CC=C45)=O)CC(O)=O)=O)CCC(N)=O)=O)C(C)C)=O)C(C)C)=O)CSSC[C@H](NC1=O)C(N[C@H](C(N)=O)[C@@H](C)O)=O

Molecular Formula

C66H99N23O17S2

Molecular Weight

1550.77

Precautions

H302, H315, H319, H335

References & Citations

[1]Soulika AM, et al. Inhibition of heparin/protamine complex-induced complement activation by Compstatin in baboons. Clin Immunol. 2000 Sep;96 (3) :212-21.|[2]Fiane AE, et al. Compstatin, a peptide inhibitor of C3, prolongs survival of ex vivo perfused pig xenografts. Xenotransplantation. 1999 Feb;6 (1) :52-65.|[3]Bert J C Janssen, et al. Structure of compstatin in complex with complement component C3c reveals a new mechanism of complement inhibition. J Biol Chem. 2007 Oct 5;282 (40) :29241-7.|[4]A Sahu, et al. Inhibition of human complement by a C3-binding peptide isolated from a phage-displayed random peptide library. J Immunol. 1996 Jul 15;157 (2) :884-91.