sapropterin   Click here for help

GtoPdb Ligand ID: 5276

Synonyms: Kuvan® | sapropterin dihydrochloride | SUN-0588 | T-1401 | tetrahydrobiopterin (THB)
Approved drug PDB Ligand Immunopharmacology Ligand
sapropterin is an approved drug (FDA (2007), EMA (2008))
Compound class: Metabolite
Comment: Sapropterin (also known as tetrahydrobiopterin or BH4) is an essential enzymatic cofactor for aromatic amino acid hydroxylase enzymes; phenylalanine hydroxylase (PAH), tryptophan hydroxylase, tyrosine hydroxylase and for nitric oxide synthase. It is used by PAH to degrade phenylalanine, and is required for the biosynthesis of the neurotransmitters serotonin, melatonin, dopamine, norepinephrine (noradrenaline) and epinephrine (adrenaline).
Sapropterin is produced via a pathway of reactions catalysed by the enzymes GTP cyclohydrolase I (GCH1; the primary and rate-limiting reaction), 6-pyruvoyltetrahydropterin synthase (PTPS) and sepiapterin reductase (SR; the terminal reaction).
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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
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 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 7
Hydrogen bond donors 6
Rotatable bonds 2
Topological polar surface area 136.29
Molecular weight 241.12
XLogP -0.1
No. Lipinski's rules broken 1
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 CC(C(C1CNc2c(N1)c(=O)[nH]c(n2)N)O)O
Isomeric SMILES C[C@@H]([C@@H]([C@H]1CNc2c(N1)c(=O)[nH]c(n2)N)O)O
InChI InChI=1S/C9H15N5O3/c1-3(15)6(16)4-2-11-7-5(12-4)8(17)14-9(10)13-7/h3-4,6,12,15-16H,2H2,1H3,(H4,10,11,13,14,17)/t3-,4+,6-/m0/s1
InChI Key FNKQXYHWGSIFBK-RPDRRWSUSA-N
Classification Click here for help
Compound class Metabolite
Approved drug? Yes (FDA (2007), EMA (2008))
IUPAC Name Click here for help
(6R)-2-amino-6-[(1R,2S)-1,2-dihydroxypropyl]-3,4,5,6,7,8-hexahydropteridin-4-one
International Nonproprietary Names Click here for help
INN number INN
6553 sapropterin
Synonyms Click here for help
Kuvan® | sapropterin dihydrochloride | SUN-0588 | T-1401 | tetrahydrobiopterin (THB)
Database Links Click here for help
CAS Registry No. 17528-72-2
ChEBI CHEBI:59560
ChEMBL Ligand CHEMBL1201774
DrugBank Ligand DB00360
DrugCentral Ligand 2612
GtoPdb PubChem SID 178101959
PubChem CID 135398654
RCSB PDB Ligand H4B
Search Google for chemical match using the InChIKey FNKQXYHWGSIFBK-RPDRRWSUSA-N
Search Google for chemicals with the same backbone FNKQXYHWGSIFBK
Search PubMed clinical trials sapropterin
Search PubMed titles sapropterin
Search PubMed titles/abstracts sapropterin
SynPHARM 79537 (in complex with L-Phenylalanine hydroxylase )
UniChem Compound Search for chemical match using the InChIKey FNKQXYHWGSIFBK-RPDRRWSUSA-N
UniChem Connectivity Search for chemical match using the InChIKey FNKQXYHWGSIFBK-RPDRRWSUSA-N
Wikipedia Tetrahydrobiopterin