compstatin   Click here for help

GtoPdb Ligand ID: 9218

Immunopharmacology Ligand
Compound class: Peptide
Comment: Compstatin is a cyclic 13 amino acid peptide inhibitor of complement component 3 (C3) [4-5]. Compstatin and analogues are being examined for immunomodulatory activity [1-2,6] in inflammatory and degenerative diseases [3].

compstatin is commercially available from our sponsors

2D Structure
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2D Structure

An image of the ligand's 2D structure. For small molecules with SMILES these are drawn using the NCI/CADD Chemical Identifier Resolver. Click on the image to access the chemical structure search tool with the ligand pre-loaded in the structure editor. For other types of ligands, e.g. longer nucleotides and peptides, a manually drawn representation of the molecule may be provided.

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SMILES / InChI / InChIKey
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SMILES / InChI / InChIKey

SMILES (Simplified Molecular Input Line Entry Specification) A specification for unambiguously describing the structure of chemical molecules using short ASCII strings. Canonical SMILES specify a unique representation of the 2D structure without chiral or isotopic specifications. Isomeric SMILES include chiral specification and isotopes.

Standard InChI (IUPAC International Chemical Identifier) and InChIKey InChI is a non-proprietary, standard, textual identifier for chemical substances designed to facilitate linking of information and database searching. An InChIKey is a simplified version of a full InChI, designed for easier web searching.

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)

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Canonical SMILES CCC(C(C(=O)NC1CSSCC(NC(=O)C(CCCN=C(N)N)NC(=O)C(Cc2[nH]cnc2)NC(=O)C(NC(=O)CNC(=O)C(NC(=O)C(NC(=O)C(NC(=O)C(NC(=O)C(NC1=O)C(C)C)C(C)C)CCC(=O)N)CC(=O)O)Cc1c[nH]c2c1cccc2)Cc1[nH]cnc1)C(=O)NC(C(=O)N)C(O)C)N)C
Isomeric SMILES CC[C@@H]([C@@H](C(=O)N[C@H]1CSSC[C@H](NC(=O)[C@H](CCCN=C(N)N)NC(=O)[C@H](Cc2[nH]cnc2)NC(=O)[C@@H](NC(=O)CNC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC1=O)C(C)C)C(C)C)CCC(=O)N)CC(=O)O)Cc1c[nH]c2c1cccc2)Cc1[nH]cnc1)C(=O)N[C@H](C(=O)N)[C@H](O)C)N)C
InChI InChI=1S/C66H99N23O17S2/c1-8-32(6)50(68)63(104)86-46-27-108-107-26-45(62(103)89-53(33(7)90)54(69)95)85-56(97)39(14-11-17-74-66(70)71)80-59(100)43(20-36-24-73-29-78-36)83-58(99)42(19-35-23-72-28-77-35)79-48(92)25-76-55(96)41(18-34-22-75-38-13-10-9-12-37(34)38)82-60(101)44(21-49(93)94)84-57(98)40(15-16-47(67)91)81-64(105)51(30(2)3)88-65(106)52(31(4)5)87-61(46)102/h9-10,12-13,22-24,28-33,39-46,50-53,75,90H,8,11,14-21,25-27,68H2,1-7H3,(H2,67,91)(H2,69,95)(H,72,77)(H,73,78)(H,76,96)(H,79,92)(H,80,100)(H,81,105)(H,82,101)(H,83,99)(H,84,98)(H,85,97)(H,86,104)(H,87,102)(H,88,106)(H,89,103)(H,93,94)(H4,70,71,74)/t32-,33+,39-,40-,41-,42-,43-,44-,45-,46-,50-,51-,52-,53-/m0/s1
InChI Key RDTRHBCZFDCUPW-KWICJJCGSA-N

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
Selectivity at ligand targets
Key to terms and symbols Click column headers to sort
Target Sp. Type Action Value Parameter Concentration range (M) Reference
complement C3 Hs Inhibitor Inhibition 6.9 pKd - 4
⤷ pKd 6.9 (Kd 1.3x10-7 M) [4]