linaclotide   Click here for help

GtoPdb Ligand ID: 5017

Synonyms: Constella® | Linzess® | MM-416775
Approved drug
linaclotide is an approved drug (FDA and EMA (2012))
Compound class: Peptide
Comment: Linaclotide represents a first-in-class, oral guanylate cyclase 2C activator [2]. It is a synthetic analogue of pathological heat-stable bacterial enterotoxins, and retains the same intrachain disulfide bond structure essential for biological activity.
Marketed formulations contain linaclotide acetate (PubChem CID 16158207). See also plecanatide, the second approved GC-C activator.
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Ligand Activity Visualisation Charts

These are box plot that provide a unique visualisation, summarising all the activity data for a ligand taken from ChEMBL and GtoPdb across multiple targets and species. Click on a plot to see the median, interquartile range, low and high data points. A value of zero indicates that no data are available. A separate chart is created for each target, and where possible the algorithm tries to merge ChEMBL and GtoPdb targets by matching them on name and UniProt accession, for each available species. However, please note that inconsistency in naming of targets may lead to data for the same target being reported across multiple charts.

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View interactive charts of activity data across species

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View more information in the IUPHAR Pharmacology Education Project: linactolide

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.

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Canonical SMILES OC(=O)CC[C@@H]1NC(=O)[C@@H]2CSSC[C@@H]3NC(=O)[C@H](C)NC(=O)[C@H]4N(C(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC1=O)Cc1ccc(cc1)O)CSSC[C@H](NC(=O)CNC(=O)[C@@H](NC3=O)[C@H](O)C)C(=O)N[C@H](C(=O)O)Cc1ccc(cc1)O)CSSC[C@@H](C(=O)N2)N)CC(=O)N)CCC4
Isomeric SMILES C[C@H]1C(=O)N[C@H]2CSSC[C@H]3C(=O)N[C@H](C(=O)N[C@H](C(=O)N[C@@H](CSSC[C@H](NC(=O)CNC(=O)[C@@H](NC2=O)[C@@H](C)O)C(=O)N[C@@H](Cc2ccc(cc2)O)C(=O)O)C(=O)N[C@@H](CSSC[C@@H](C(=O)N3)N)C(=O)N[C@H](C(=O)N2CCC[C@H]2C(=O)N1)CC(=O)N)Cc1ccc(cc1)O)CCC(=O)O
InChI InChI=1S/C59H79N15O21S6/c1-26-47(82)69-41-25-101-99-22-38-52(87)65-33(13-14-45(80)81)49(84)66-34(16-28-5-9-30(76)10-6-28)50(85)71-40(54(89)72-39(23-97-96-20-32(60)48(83)70-38)53(88)67-35(18-43(61)78)58(93)74-15-3-4-42(74)56(91)63-26)24-100-98-21-37(64-44(79)19-62-57(92)46(27(2)75)73-55(41)90)51(86)68-36(59(94)95)17-29-7-11-31(77)12-8-29/h5-12,26-27,32-42,46,75-77H,3-4,13-25,60H2,1-2H3,(H2,61,78)(H,62,92)(H,63,91)(H,64,79)(H,65,87)(H,66,84)(H,67,88)(H,68,86)(H,69,82)(H,70,83)(H,71,85)(H,72,89)(H,73,90)(H,80,81)(H,94,95)/t26-,27+,32-,33-,34-,35-,36-,37-,38-,39-,40-,41-,42-,46-/m0/s1
InChI Key KXGCNMMJRFDFNR-WDRJZQOASA-N
Selectivity at catalytic receptors
Key to terms and symbols Click column headers to sort
Target Sp. Type Action Value Parameter Concentration range (M) Reference
Guanylyl cyclase-C Primary target of this compound Hs Agonist Agonist 8.9 pKi - 2-3
⤷ pKi 8.9 (Ki 1.24x10-9 M) [2-3]
Description: Competitive-inhibition of [125I]-STa binding to T84 colorectal carcinoma cells
Guanylyl cyclase-C Rn Agonist Agonist 8.4 pKi - 2
⤷ pKi 8.4 (Ki 4.2x10-9 M) [2]
Description: Competitive-inhibition of [125I]-STa binding to rat intestinal mucosa