triiodothyronine   Click here for help

GtoPdb Ligand ID: 2634

Abbreviated name: T3
Synonyms: 3,5,3'-triodo-L-thyronine | Cytomel® | liothyronine sodium
Approved drug PDB Ligand
triiodothyronine is an approved drug (FDA (1956))
Compound class: Metabolite
Comment: Thyroid hormone receptor agonist
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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

IUPHAR Pharmacology Education Project (PEP) logo

View more information in the IUPHAR Pharmacology Education Project: t3

triiodothyronine 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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Click here for structure editor
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 CDK toolkit. 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 3
Hydrogen bond donors 3
Rotatable bonds 5
Topological polar surface area 92.78
Molecular weight 650.79
XLogP 2.9
No. Lipinski's rules broken 0
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)C(Cc1cc(I)c(c(c1)I)Oc1ccc(c(c1)I)O)N
Isomeric SMILES OC(=O)[C@H](Cc1cc(I)c(c(c1)I)Oc1ccc(c(c1)I)O)N
InChI InChI=1S/C15H12I3NO4/c16-9-6-8(1-2-13(9)20)23-14-10(17)3-7(4-11(14)18)5-12(19)15(21)22/h1-4,6,12,20H,5,19H2,(H,21,22)/t12-/m0/s1
InChI Key AUYYCJSJGJYCDS-LBPRGKRZSA-N
Natural/Endogenous Targets
Target
Thyroid hormone receptor-α
Thyroid hormone receptor-β
Enzymes Catalysing Reactions with this Compound as a Substrate or Product
Enzyme EC number Reaction Reference
iodothyronine deiodinase 2 1.97.1.10 T4 -> triiodothyronine
rT3 -> T2
iodothyronine deiodinase 1 1.97.1.10 T4 -> triiodothyronine
rT3 -> T2
iodothyronine deiodinase 3 1.97.1.11 T4 -> triiodothyronine
rT3 -> T2
Transporters Moving this Compound Across a Lipid Membrane
Transporter EC number Reaction Reference
Monocarboxylate transporter 8 1
Selectivity at nuclear hormone receptors
Key to terms and symbols Click column headers to sort
Target Sp. Type Action Value Parameter Concentration range (M) Reference
Thyroid hormone receptor-β Primary target of this compound Ligand is endogenous in the given species Hs Agonist Agonist 10.1 pKd - 2
⤷ pKd 10.1 [2]
Thyroid hormone receptor-α Primary target of this compound Ligand is endogenous in the given species Hs Agonist Agonist 10.0 pKd - 2
⤷ pKd 10.0 [2]
Additional information and targets (data relate to human unless otherwise stated)
Description Data Reference
Rank order of potency at Thyroid hormone receptor-β triiodothyronine > T4
Rank order of potency at Thyroid hormone receptor-α triiodothyronine > T4
Ligand mentioned in the following text fields
1A. Thyroid hormone receptors overview
Sodium iodide symporter, sodium-dependent multivitamin transporter and sodium-coupled monocarboxylate transporters overview
Thyroid hormone turnover overview