Record Information
Version1.0
Creation Date2016-09-30 22:45:15 UTC
Update Date2020-06-04 18:59:03 UTC
BMDB IDBMDB0001389
Secondary Accession Numbers
  • BMDB01389
Metabolite Identification
Common NameMelatonin
DescriptionMelatonin, also known as circadin or melatol, belongs to the class of organic compounds known as 3-alkylindoles. 3-alkylindoles are compounds containing an indole moiety that carries an alkyl chain at the 3-position. Melatonin is a drug which is used orally for jet lag, insomnia, shift-work disorder, circadian rhythm disorders in the blind (evidence for efficacy), and benzodiazepine and nicotine withdrawal. evidence indicates that melatonin is likely effective for treating circadian rhythm sleep disorders in blind children and adults. it has received fda orphan drug status as an oral medication for this use. a number of studies have shown that melatonin may be effective for treating sleep-wake cycle disturbances in children and adolescents with mental retardation, autism, and other central nervous system disorders. it appears to decrease the time to fall asleep in children with developmental disabilities, such as cerebral palsy, autism, and mental retardation. it may also improve secondary insomnia associated with various sleep-wake cycle disturbances. other possible uses for which there is some evidence for include: benzodiazepine withdrawal, cluster headache, delayed sleep phase syndrome (dsps), primary insomnia, jet lag, nicotine withdrawal, preoperative anxiety and sedation, prostate cancer, solid tumors (when combined with il-2 therapy in certain cancers), sunburn prevention (topical use), tardive dyskinesia, thrombocytopenia associated with cancer, chemotherapy and other disorders. . Melatonin exists as a solid, possibly soluble (in water), and an extremely weak basic (essentially neutral) compound (based on its pKa) molecule. Melatonin exists in all living organisms, ranging from bacteria to humans. Melatonin participates in a number of enzymatic reactions, within cattle. In particular, Melatonin and S-adenosylhomocysteine can be biosynthesized from N-acetylserotonin and S-adenosylmethionine through the action of the enzyme acetylserotonin O-methyltransferase. In addition, Melatonin can be converted into 6-hydroxymelatonin; which is mediated by the enzyme cytochrome P450 1A1. In cattle, melatonin is involved in the metabolic pathway called the tryptophan metabolism pathway. Melatonin is a potentially toxic compound.
Structure
Thumb
Synonyms
ValueSource
5-Methoxy-N-acetyltryptamineChEBI
MelatonineChEBI
N-[2-(5-Methoxyindol-3-yl)ethyl]acetamideChEBI
N-Acetyl-5-methoxytryptamineChEBI
MelatoninaKegg
CircadinHMDB
MelatolHMDB
Melatonin (synth.) standard-gradeHMDB
Melatonin (synth.) ultra-pureHMDB
MelovineHMDB
MT6HMDB
N-(2-(5-Methoxy-1H-indol-3-yl)ethyl)acetamideHMDB
N-(2-(5-Methoxyindol-3-yl)ethyl)-acetamideHMDB
N-(2-(5-Methoxyindol-3-yl)ethyl)acetamideHMDB
N-Acetyl-5-methoxy-tryptamineHMDB
N-Acetyl-5-methoxy-tryptamine melatonineHMDB
N-[2-(5-Methoxy-1H-indol-3-yl)ethyl)acetamideHMDB
N-[2-(5-Methoxy-1H-indol-3-yl)ethyl]-acetamideHMDB
N-[2-(5-Methoxy-1H-indol-3-yl)ethyl]acetamideHMDB
N-[2-(5-Methoxyindol-3-yl)ethyl]-acetamideHMDB
RegulinHMDB
{N-[2-(5-methoxy-1H-indol-3-yl)ethyl]-} acetamideHMDB
{N-[2-(5-methoxyindol-3-yl)ethyl]-} acetamideHMDB
3-(2-Acetamidoethyl)-5-methoxyindoleHMDB
MelatoninHMDB
Chemical FormulaC13H16N2O2
Average Molecular Weight232.2783
Monoisotopic Molecular Weight232.121177766
IUPAC NameN-[2-(5-methoxy-1H-indol-3-yl)ethyl]acetamide
Traditional Namemelatonin
CAS Registry Number73-31-4
SMILES
COC1=CC2=C(NC=C2CCNC(C)=O)C=C1
InChI Identifier
InChI=1S/C13H16N2O2/c1-9(16)14-6-5-10-8-15-13-4-3-11(17-2)7-12(10)13/h3-4,7-8,15H,5-6H2,1-2H3,(H,14,16)
InChI KeyDRLFMBDRBRZALE-UHFFFAOYSA-N
Chemical Taxonomy
Description belongs to the class of organic compounds known as 3-alkylindoles. 3-alkylindoles are compounds containing an indole moiety that carries an alkyl chain at the 3-position.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
ClassIndoles and derivatives
Sub ClassIndoles
Direct Parent3-alkylindoles
Alternative Parents
Substituents
  • 3-alkylindole
  • Anisole
  • Alkyl aryl ether
  • Substituted pyrrole
  • Benzenoid
  • Pyrrole
  • Heteroaromatic compound
  • Propargyl-type 1,3-dipolar organic compound
  • Ether
  • Carboximidic acid derivative
  • Carboximidic acid
  • Organic 1,3-dipolar compound
  • Azacycle
  • Organic oxygen compound
  • Hydrocarbon derivative
  • Organopnictogen compound
  • Organic nitrogen compound
  • Organooxygen compound
  • Organonitrogen compound
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External Descriptors
Ontology
StatusDetected and Quantified
Origin
  • Endogenous
BiofunctionNot Available
ApplicationNot Available
Cellular locations
  • Cytoplasm
Physical Properties
StateSolid
Experimental Properties
PropertyValueReference
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
PropertyValueSource
logP1.42ALOGPS
logP1.15ChemAxon
logS-3.2ALOGPS
pKa (Strongest Acidic)15.8ChemAxon
pKa (Strongest Basic)-1.6ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count2ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area54.12 ŲChemAxon
Rotatable Bond Count4ChemAxon
Refractivity66.28 m³·mol⁻¹ChemAxon
Polarizability25.65 ųChemAxon
Number of Rings2ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectra
Spectra
Biological Properties
Cellular Locations
  • Cytoplasm
Biospecimen Locations
  • Adipose Tissue
  • Adrenal Cortex
  • Adrenal Gland
  • Adrenal Medulla
  • Bladder
  • Brain
  • Fibroblasts
  • Intestine
  • Kidney
  • Leukocyte
  • Liver
  • Milk
  • Neuron
  • Ovary
  • Pancreas
  • Pineal Gland
  • Placenta
  • Platelet
  • Prostate Tissue
  • Testis
Pathways
Normal Concentrations
BiospecimenStatusValueAgeSexConditionReferenceDetails
Adipose TissueExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
Adrenal CortexExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
Adrenal GlandExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
Adrenal MedullaExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
BladderExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
BrainExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
FibroblastsExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
IntestineExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
KidneyExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
LeukocyteExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
LiverExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
MilkDetected and Quantified0.00003 - 0.00006458 uMNot SpecifiedNot Specified
Normal
details
NeuronExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
OvaryExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
PancreasExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
Pineal GlandExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
PlacentaExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
PlateletExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
Prostate TissueExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
TestisExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedNormal
  • Not Applicable
details
Abnormal Concentrations
Not Available
HMDB IDHMDB0001389
DrugBank IDDB01065
Phenol Explorer Compound IDNot Available
FooDB IDFDB004234
KNApSAcK IDNot Available
Chemspider ID872
KEGG Compound IDC01598
BioCyc IDN-ACETYL-5-METHOXY-TRYPTAMINE
BiGG ID37965
Wikipedia LinkMelatonin
METLIN ID73
PubChem Compound896
PDB IDNot Available
ChEBI ID16796
References
Synthesis ReferenceReddy, Gaddam Om; Sarma, Mamillapilli Ramabhadra; Prabhakar, Chebiyyam. An improved process for the preparation of melatonin. Indian (2001), 30 pp.
Material Safety Data Sheet (MSDS)Not Available
General References
  1. Eriksson L, Valtonen M, Laitinen JT, Paananen M, Kaikkonen M: Diurnal rhythm of melatonin in bovine milk: pharmacokinetics of exogenous melatonin in lactating cows and goats. Acta Vet Scand. 1998;39(3):301-10. [PubMed:9787493 ]

Enzymes

General function:
Secondary metabolites biosynthesis, transport and catabolism
Specific function:
A cytochrome P450 monooxygenase involved in the metabolism of arachidonic acid and its conjugates. Mechanistically, uses molecular oxygen inserting one oxygen atom into a substrate, and reducing the second into a water molecule, with two electrons provided by NADPH via cytochrome P450 reductase (CPR; NADPH-ferrihemoprotein reductase). Acts as an omega and omega-1 hydroxylase for arachidonic acid and possibly for other long chain fatty acids. May modulate the arachidonic acid signaling pathway and play a role in other fatty acid signaling processes. May downregulate the biological activities of N-arachidonoyl-serotonin, an endocannabinoid that has anti-nociceptive effects through inhibition of fatty acid amide hydrolase FAAH, TRPV1 receptor and T-type calcium channels. Catalyzes C-2 oxidation of the indole ring of N-arachidonoyl-serotonin forming a less active product 2-oxo-N-arachidonoyl-serotonin.
Gene Name:
CYP2U1
Uniprot ID:
Q0IIF9
Molecular weight:
61997.0
Reactions
Melatonin + Oxygen + Reduced flavoprotein → 6-Hydroxymelatonin + Water + Oxidized flavoproteindetails
General function:
Secondary metabolites biosynthesis, transport and catabolism
Specific function:
Catalyzes the transfer of a methyl group onto N-acetylserotonin, producing melatonin (N-acetyl-5-methoxytryptamine).
Gene Name:
ASMT
Uniprot ID:
P10950
Molecular weight:
37924.0
Reactions
N-Acetylserotonin + S-Adenosylmethionine → Melatonin + S-Adenosylhomocysteinedetails
General function:
Involved in melatonin receptor activity
Specific function:
High affinity receptor for melatonin. Likely to mediate the reproductive and circadian actions of melatonin. The activity of this receptor is mediated by pertussis toxin sensitive G proteins that inhibit adenylate cyclase activity.
Gene Name:
MTNR1A
Uniprot ID:
O02769
Molecular weight:
29370.0
General function:
Involved in melatonin receptor activity
Specific function:
Not Available
Gene Name:
Not Available
Uniprot ID:
B5LED7
Molecular weight:
24008.0
General function:
Involved in melatonin receptor activity
Specific function:
Not Available
Gene Name:
Not Available
Uniprot ID:
B5LED8
Molecular weight:
32673.0
General function:
Not Available
Specific function:
Not Available
Gene Name:
IDO1
Uniprot ID:
F1N7C5
Molecular weight:
50061.0
Reactions
Melatonin + Oxygen → Acetyl-N-formyl-5-methoxykynurenaminedetails