eritoran   Click here for help

GtoPdb Ligand ID: 4919

Synonyms: B1287 | E5564
PDB Ligand
Compound class: Synthetic organic
Comment: Eritoran is a synthetic analogue of lipid A, the bacterial LPS component. It is referred to as a Toll-like receptor 4 (TLR4) antagonist, but rather than direct interaction, eritoran binds to MD-2 and prevents formation of the MD-2.TLR4 protein complex. Thus, eritoran appears to antagonise LPS-induced TLR4 activation.
Eritoran has been investigated as a therapeutic for the management of sepsis, but failed to show sufficient clinical effect [1].
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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Physico-chemical Properties
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Physico-chemical Properties

Calculated molecular properties are available for small molecules and natural products (not peptides). Properties were 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/). All properties were selected to enable the prediction of the Lipinski Rule-of-Five profile or ‘druglikeness’ for each ligand. For more info on each category see the help pages.

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Hydrogen bond acceptors 21
Hydrogen bond donors 7
Rotatable bonds 61
Topological polar surface area 313.25
Molecular weight 1312.84
XLogP 16.43
No. Lipinski's rules broken 4

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/)
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 CCCCCCCCCCOC1C(O)C(COC2OC(COC)C(C(C2NC(=O)CCCCCCCCCC=CCCCCCC)OCCC(CCCCCCC)OC)OP(=O)(O)O)OC(C1NC(=O)CC(=O)CCCCCCCCCCC)OP(=O)(O)O
Isomeric SMILES CCCCCCCCCCO[C@H]1[C@H](O)[C@@H](CO[C@@H]2O[C@H](COC)[C@H]([C@@H]([C@H]2NC(=O)CCCCCCCCC/C=C\CCCCCC)OCC[C@@H](CCCCCCC)OC)OP(=O)(O)O)O[C@@H]([C@@H]1NC(=O)CC(=O)CCCCCCCCCCC)OP(=O)(O)O
InChI InChI=1S/C66H126N2O19P2/c1-7-11-15-19-22-25-26-27-28-29-30-32-34-38-42-46-57(70)67-60-64(82-49-47-54(80-6)45-41-36-18-14-10-4)62(86-88(73,74)75)56(51-79-5)85-65(60)83-52-55-61(72)63(81-48-43-39-35-24-21-17-13-9-3)59(66(84-55)87-89(76,77)78)68-58(71)50-53(69)44-40-37-33-31-23-20-16-12-8-2/h25-26,54-56,59-66,72H,7-24,27-52H2,1-6H3,(H,67,70)(H,68,71)(H2,73,74,75)(H2,76,77,78)/b26-25-/t54-,55-,56-,59-,60-,61-,62-,63-,64-,65-,66-/m1/s1
InChI Key BPSMYQFMCXXNPC-MFCPCZTFSA-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/)
Targets where the ligand is described in the comment field
Target Comment
TLR4 Eritoran (E5564) is a lipid A analogue, which has been described as a TLR4 antagonist [2]. TLR4 signals in conjunction with the co-factor MD-2 (LY96).