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Record Information
Version3.6
Creation Date2012-09-06 15:16:49 UTC
Update Date2016-02-11 01:28:33 UTC
HMDB IDHMDB14440
Secondary Accession NumbersNone
Metabolite Identification
Common NameMorphine
DescriptionMorphine is only found in individuals that have used or taken this drug. It is the principal alkaloid in opium and the prototype opiate analgesic and narcotic. Morphine has widespread effects in the central nervous system and on smooth muscle. [PubChem]The precise mechanism of the analgesic action of morphine is unknown. However, specific CNS opiate receptors have been identified and likely play a role in the expression of analgesic effects. Morphine first acts on the mu-opioid receptors. The mechanism of respiratory depression involves a reduction in the responsiveness of the brain stem respiratory centers to increases in carbon dioxide tension and to electrical stimulation.It has been shown that morphine binds to and inhibits GABA inhibitory interneurons. These interneurons normally inhibit the descending pain inhibition pathway. So, without the inhibitory signals, pain modulation can proceed downstream.
Structure
Thumb
Synonyms
ValueSource
(-)-MorphineChEBI
(5alpha,6alpha)-17-Methyl-7,8-didehydro-4,5-epoxymorphinan-3,6-diolChEBI
(5alpha,6alpha)-didehydro-4,5-Epoxy-17-methylmorphinan-3,6-diolChEBI
(5R,6S,9R,13S,14R)-4,5-Epoxy-N-methyl-7-morphinen-3,6-diolChEBI
(7R,7AS,12BS)-3-methyl-2,3,4,4a,7,7a-hexahydro-1H-4,12-methano[1]benzofuro[3,2-e]isoquinoline-7,9-diolChEBI
MorfinaChEBI
MorphiaChEBI
MorphinChEBI
MorphinumChEBI
MorphiumChEBI
(5a,6a)-17-Methyl-7,8-didehydro-4,5-epoxymorphinan-3,6-diolGenerator
(5α,6α)-17-methyl-7,8-didehydro-4,5-epoxymorphinan-3,6-diolGenerator
(5a,6a)-didehydro-4,5-Epoxy-17-methylmorphinan-3,6-diolGenerator
(5α,6α)-didehydro-4,5-epoxy-17-methylmorphinan-3,6-diolGenerator
D-(-)-MorphineHMDB
MorphinaHMDB
Morphine sulfateHMDB
Chemical FormulaC17H19NO3
Average Molecular Weight285.3377
Monoisotopic Molecular Weight285.136493479
IUPAC Name(1S,5R,13R,14S,17R)-4-methyl-12-oxa-4-azapentacyclo[9.6.1.0¹,¹³.0⁵,¹⁷.0⁷,¹⁸]octadeca-7(18),8,10,15-tetraene-10,14-diol
Traditional Namemorph
CAS Registry Number57-27-2
SMILES
[H][C@@]12OC3=C(O)C=CC4=C3[C@@]11CCN(C)[C@]([H])(C4)[C@]1([H])C=C[C@@H]2O
InChI Identifier
InChI=1S/C17H19NO3/c1-18-7-6-17-10-3-5-13(20)16(17)21-15-12(19)4-2-9(14(15)17)8-11(10)18/h2-5,10-11,13,16,19-20H,6-8H2,1H3/t10-,11+,13-,16-,17-/m0/s1
InChI KeyInChIKey=BQJCRHHNABKAKU-KBQPJGBKSA-N
Chemical Taxonomy
DescriptionThis compound belongs to the class of organic compounds known as morphinans. These are polycyclic compounds with a four-ring skeleton with three condensed six-member rings forming a partially hydrogenated phenanthrene moiety, one of which is aromatic while the two others are alicyclic.
KingdomOrganic compounds
Super ClassAlkaloids and derivatives
ClassMorphinans
Sub ClassNot Available
Direct ParentMorphinans
Alternative Parents
Substituents
  • Morphinan
  • Benzylisoquinoline
  • Phenanthrene
  • Tetralin
  • Benzofuran
  • Aralkylamine
  • Alkyl aryl ether
  • Benzenoid
  • Piperidine
  • Tertiary aliphatic amine
  • Tertiary amine
  • Secondary alcohol
  • Oxacycle
  • Azacycle
  • Organoheterocyclic compound
  • Ether
  • Hydrocarbon derivative
  • Organooxygen compound
  • Organonitrogen compound
  • Amine
  • Alcohol
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External Descriptors
Ontology
StatusExpected but not Quantified
Origin
  • Drug
  • Drug metabolite
Biofunction
  • Waste products
Application
  • Pharmaceutical
Cellular locations
  • Membrane
Physical Properties
StateSolid
Experimental Properties
PropertyValueReference
Melting Point255 °C (sulfate salt)Not Available
Boiling PointNot AvailableNot Available
Water Solubility1.02e+01 g/LNot Available
LogP0.8Not Available
Predicted Properties
PropertyValueSource
Water Solubility10.2 mg/mLALOGPS
logP0.99ALOGPS
logP0.9ChemAxon
logS-1.4ALOGPS
pKa (Strongest Acidic)10.26ChemAxon
pKa (Strongest Basic)9.12ChemAxon
Physiological Charge1ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area52.93 Å2ChemAxon
Rotatable Bond Count0ChemAxon
Refractivity80.12 m3·mol-1ChemAxon
Polarizability29.95 Å3ChemAxon
Number of Rings5ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectra
Spectra
Spectrum TypeDescriptionSplash Key
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, PositiveNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, PositiveNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, PositiveNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, NegativeNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, NegativeNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, NegativeNot Available
Biological Properties
Cellular Locations
  • Membrane
Biofluid Locations
  • Blood
  • Urine
Tissue Location
  • Kidney
  • Liver
Pathways
NameSMPDB LinkKEGG Link
Codeine Metabolism PathwaySMP00621Not Available
Codeine PathwaySMP00405Not Available
Heroin Metabolism PathwaySMP00623Not Available
Heroin PathwaySMP00407Not Available
Morphine Metabolism PathwaySMP00622Not Available
Morphine PathwaySMP00406Not Available
Normal Concentrations
BiofluidStatusValueAgeSexConditionReferenceDetails
BloodExpected but not QuantifiedNot ApplicableNot AvailableNot AvailableTaking drug identified by DrugBank entry DB00295
  • Not Applicable
details
UrineExpected but not QuantifiedNot ApplicableNot AvailableNot AvailableTaking drug identified by DrugBank entry DB00295
  • Not Applicable
details
Abnormal Concentrations
Not Available
Predicted Concentrations
BiofluidValueOriginal ageOriginal sexOriginal conditionComments
Blood0-0.4 uMAdult (>18 years old)BothNormalPredicted based on drug qualities
Blood0-0.2 umol/mmol creatinineAdult (>18 years old)BothNormalPredicted based on drug qualities
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDDB00295
DrugBank Metabolite IDDBMET00313
Phenol Explorer Compound IDNot Available
Phenol Explorer Metabolite IDNot Available
FoodDB IDNot Available
KNApSAcK IDNot Available
Chemspider ID4450907
KEGG Compound IDC01516
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkMorphine
NuGOwiki LinkHMDB14440
Metagene LinkHMDB14440
METLIN IDNot Available
PubChem Compound5288826
PDB IDMOI
ChEBI ID17303
References
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General References
  1. Loguinov AV, Anderson LM, Crosby GJ, Yukhananov RY: Gene expression following acute morphine administration. Physiol Genomics. 2001 Aug 28;6(3):169-81. [11526201 ]
  2. Kilpatrick GJ, Smith TW: Morphine-6-glucuronide: actions and mechanisms. Med Res Rev. 2005 Sep;25(5):521-44. [15952175 ]

Enzymes

General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDPGTs are of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds. This isozyme has glucuronidating capacity with steroid substrates such as 5-beta-androstane 3-alpha,17-beta-diol, estradiol, ADT, eugenol and bile acids. Only isoform 1 seems to be active.
Gene Name:
UGT2B28
Uniprot ID:
Q9BY64
Molecular weight:
38742.9
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDPGTs are of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds. This isozyme is active on polyhydroxylated estrogens (such as estriol, 4-hydroxyestrone and 2-hydroxyestriol) and xenobiotics (such as 4-methylumbelliferone, 1-naphthol, 4-nitrophenol, 2-aminophenol, 4-hydroxybiphenyl and menthol). It is capable of 6 alpha-hydroxyglucuronidation of hyodeoxycholic acid.
Gene Name:
UGT2B4
Uniprot ID:
P06133
Molecular weight:
60512.035
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
References
  1. Abildskov K, Weldy P, Garland M: Molecular cloning of the baboon UDP-glucuronosyltransferase 2B gene family and their activity in conjugating morphine. Drug Metab Dispos. 2010 Apr;38(4):545-53. Epub 2010 Jan 13. [20071451 ]
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDPGT is of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds. This isoform glucuronidates bilirubin IX-alpha to form both the IX-alpha-C8 and IX-alpha-C12 monoconjugates and diconjugate.
Gene Name:
UGT1A4
Uniprot ID:
P22310
Molecular weight:
60024.535
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDPGT is of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds.
Gene Name:
UGT2B10
Uniprot ID:
P36537
Molecular weight:
60773.485
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDPGT is of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds. Its unique specificity for 3,4-catechol estrogens and estriol suggests it may play an important role in regulating the level and activity of these potent and active estrogen metabolites. Is also active with androsterone, hyodeoxycholic acid and tetrachlorocatechol (in vitro).
Gene Name:
UGT2B7
Uniprot ID:
P16662
Molecular weight:
60720.15
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
References
  1. Coffman BL, Rios GR, King CD, Tephly TR: Human UGT2B7 catalyzes morphine glucuronidation. Drug Metab Dispos. 1997 Jan;25(1):1-4. [9010622 ]
  2. Takeda S, Ishii Y, Iwanaga M, Mackenzie PI, Nagata K, Yamazoe Y, Oguri K, Yamada H: Modulation of UDP-glucuronosyltransferase function by cytochrome P450: evidence for the alteration of UGT2B7-catalyzed glucuronidation of morphine by CYP3A4. Mol Pharmacol. 2005 Mar;67(3):665-72. Epub 2004 Dec 20. [15611481 ]
  3. Yamada H, Ishii K, Ishii Y, Ieiri I, Nishio S, Morioka T, Oguri K: Formation of highly analgesic morphine-6-glucuronide following physiologic concentration of morphine in human brain. J Toxicol Sci. 2003 Dec;28(5):395-401. [14746343 ]
  4. Abildskov K, Weldy P, Garland M: Molecular cloning of the baboon UDP-glucuronosyltransferase 2B gene family and their activity in conjugating morphine. Drug Metab Dispos. 2010 Apr;38(4):545-53. Epub 2010 Jan 13. [20071451 ]
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDPGTs are of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds. This isozyme displays activity toward several classes of xenobiotic substrates, including simple phenolic compounds, 7-hydroxylated coumarins, flavonoids, anthraquinones, and certain drugs and their hydroxylated metabolites. It also catalyzes the glucuronidation of endogenous estrogens and androgens.
Gene Name:
UGT2B15
Uniprot ID:
P54855
Molecular weight:
61035.815
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
References
  1. Abildskov K, Weldy P, Garland M: Molecular cloning of the baboon UDP-glucuronosyltransferase 2B gene family and their activity in conjugating morphine. Drug Metab Dispos. 2010 Apr;38(4):545-53. Epub 2010 Jan 13. [20071451 ]
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDP-glucuronosyltransferases catalyze phase II biotransformation reactions in which lipophilic substrates are conjugated with glucuronic acid to increase water solubility and enhance excretion. They are of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds. Active on odorants and seems to be involved in olfaction; it could help clear lipophilic odorant molecules from the sensory epithelium.
Gene Name:
UGT2A1
Uniprot ID:
Q9Y4X1
Molecular weight:
60771.605
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDPGT is of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds. This isoform glucuronidates bilirubin IX-alpha to form both the IX-alpha-C8 and IX-alpha-C12 monoconjugates and diconjugate. Is also able to catalyze the glucuronidation of 17beta-estradiol, 17alpha-ethinylestradiol, 1-hydroxypyrene, 4-methylumbelliferone, 1-naphthol, paranitrophenol, scopoletin, and umbelliferone.
Gene Name:
UGT1A1
Uniprot ID:
P22309
Molecular weight:
59590.91
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
References
  1. Ohno S, Kawana K, Nakajin S: Contribution of UDP-glucuronosyltransferase 1A1 and 1A8 to morphine-6-glucuronidation and its kinetic properties. Drug Metab Dispos. 2008 Apr;36(4):688-94. Epub 2008 Jan 10. [18187562 ]
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDPGT is of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds. This isoform has specificity for phenols.
Gene Name:
UGT1A9
Uniprot ID:
O60656
Molecular weight:
59940.495
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDPGT is of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds.
Gene Name:
UGT1A8
Uniprot ID:
Q9HAW9
Molecular weight:
59741.035
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
References
  1. Ohno S, Kawana K, Nakajin S: Contribution of UDP-glucuronosyltransferase 1A1 and 1A8 to morphine-6-glucuronidation and its kinetic properties. Drug Metab Dispos. 2008 Apr;36(4):688-94. Epub 2008 Jan 10. [18187562 ]
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDPGT is of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds.
Gene Name:
UGT1A3
Uniprot ID:
P35503
Molecular weight:
60337.835
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
References
  1. Green MD, King CD, Mojarrabi B, Mackenzie PI, Tephly TR: Glucuronidation of amines and other xenobiotics catalyzed by expressed human UDP-glucuronosyltransferase 1A3. Drug Metab Dispos. 1998 Jun;26(6):507-12. [9616184 ]
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDPGT is of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds.
Gene Name:
UGT1A10
Uniprot ID:
Q9HAW8
Molecular weight:
59809.075
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDPGT is of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds. The major substrates of this isozyme are eugenol > 4-methylumbelliferone > dihydrotestosterone (DHT) > androstane-3-alpha,17-beta-diol (3-alpha-diol) > testosterone > androsterone (ADT).
Gene Name:
UGT2B17
Uniprot ID:
O75795
Molecular weight:
61094.915
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDPGT is of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds. This isoform has specificity for phenols.
Gene Name:
UGT1A6
Uniprot ID:
P19224
Molecular weight:
60750.215
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDPGT is of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds.
Gene Name:
UGT1A5
Uniprot ID:
P35504
Molecular weight:
60070.565
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDPGT is of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds.
Gene Name:
UGT2B11
Uniprot ID:
O75310
Molecular weight:
61037.8
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDPGT is of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds.
Gene Name:
UGT1A7
Uniprot ID:
Q9HAW7
Molecular weight:
59818.315
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
General function:
Involved in monooxygenase activity
Specific function:
Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It performs a variety of oxidation reactions (e.g. caffeine 8-oxidation, omeprazole sulphoxidation, midazolam 1'-hydroxylation and midazolam 4-hydroxylation) of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. Acts as a 1,8-cineole 2-exo-monooxygenase. The enzyme also hydroxylates etoposide.
Gene Name:
CYP3A4
Uniprot ID:
P08684
Molecular weight:
57255.585
References
  1. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. Epub 2009 Nov 24. [19934256 ]
General function:
Involved in monooxygenase activity
Specific function:
Responsible for the metabolism of many drugs and environmental chemicals that it oxidizes. It is involved in the metabolism of drugs such as antiarrhythmics, adrenoceptor antagonists, and tricyclic antidepressants.
Gene Name:
CYP2D6
Uniprot ID:
P10635
Molecular weight:
55768.94
References
  1. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. Epub 2009 Nov 24. [19934256 ]
General function:
Involved in monooxygenase activity
Specific function:
Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It oxidizes a variety of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. In the epoxidation of arachidonic acid it generates only 14,15- and 11,12-cis-epoxyeicosatrienoic acids. It is the principal enzyme responsible for the metabolism the anti-cancer drug paclitaxel (taxol).
Gene Name:
CYP2C8
Uniprot ID:
P10632
Molecular weight:
55824.275
References
  1. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. Epub 2009 Nov 24. [19934256 ]
General function:
Involved in G-protein coupled receptor protein signaling pathway
Specific function:
Inhibits neurotransmitter release by reducing calcium ion currents and increasing potassium ion conductance. Highly stereoselective. receptor for enkephalins
Gene Name:
OPRD1
Uniprot ID:
P41143
Molecular weight:
40412.3
References
  1. Yamada H, Shimoyama N, Sora I, Uhl GR, Fukuda Y, Moriya H, Shimoyama M: Morphine can produce analgesia via spinal kappa opioid receptors in the absence of mu opioid receptors. Brain Res. 2006 Apr 14;1083(1):61-9. Epub 2006 Mar 10. [16530171 ]
  2. Dortch-Carnes J, Russell KR: Morphine-induced reduction of intraocular pressure and pupil diameter: role of nitric oxide. Pharmacology. 2006;77(1):17-24. Epub 2006 Mar 13. [16534251 ]
  3. Koch T, Wu DF, Yang LQ, Brandenburg LO, Hollt V: Role of phospholipase D2 in the agonist-induced and constitutive endocytosis of G-protein coupled receptors. J Neurochem. 2006 Apr;97(2):365-72. Epub 2006 Mar 15. [16539674 ]
  4. Galeotti N, Stefano GB, Guarna M, Bianchi E, Ghelardini C: Signaling pathway of morphine induced acute thermal hyperalgesia in mice. Pain. 2006 Aug;123(3):294-305. Epub 2006 May 2. [16650582 ]
  5. Asensio VJ, Miralles A, Garcia-Sevilla JA: Stimulation of mitogen-activated protein kinase kinases (MEK1/2) by mu-, delta- and kappa-opioid receptor agonists in the rat brain: regulation by chronic morphine and opioid withdrawal. Eur J Pharmacol. 2006 Jun 6;539(1-2):49-56. Epub 2006 Apr 6. [16678156 ]
  6. Chen X, Ji ZL, Chen YZ: TTD: Therapeutic Target Database. Nucleic Acids Res. 2002 Jan 1;30(1):412-5. [11752352 ]
  7. Kieffer BL, Gaveriaux-Ruff C: Exploring the opioid system by gene knockout. Prog Neurobiol. 2002 Apr;66(5):285-306. [12015197 ]
General function:
Involved in G-protein coupled receptor protein signaling pathway
Specific function:
Inhibits neurotransmitter release by reducing calcium ion currents and increasing potassium ion conductance. Receptor for beta-endorphin
Gene Name:
OPRM1
Uniprot ID:
P35372
Molecular weight:
44778.9
References
  1. Yamada H, Shimoyama N, Sora I, Uhl GR, Fukuda Y, Moriya H, Shimoyama M: Morphine can produce analgesia via spinal kappa opioid receptors in the absence of mu opioid receptors. Brain Res. 2006 Apr 14;1083(1):61-9. Epub 2006 Mar 10. [16530171 ]
  2. Choi HS, Kim CS, Hwang CK, Song KY, Wang W, Qiu Y, Law PY, Wei LN, Loh HH: The opioid ligand binding of human mu-opioid receptor is modulated by novel splice variants of the receptor. Biochem Biophys Res Commun. 2006 May 19;343(4):1132-40. Epub 2006 Mar 23. [16580639 ]
  3. Castro RR, Cunha FQ, Silva FS Jr, Rocha FA: A quantitative approach to measure joint pain in experimental osteoarthritis--evidence of a role for nitric oxide. Osteoarthritis Cartilage. 2006 Aug;14(8):769-76. Epub 2006 Mar 31. [16580848 ]
  4. Johnson EA, Oldfield S, Braksator E, Gonzalez-Cuello A, Couch D, Hall KJ, Mundell SJ, Bailey CP, Kelly E, Henderson G: Agonist-selective mechanisms of mu-opioid receptor desensitization in human embryonic kidney 293 cells. Mol Pharmacol. 2006 Aug;70(2):676-85. Epub 2006 May 8. [16682505 ]
  5. Chen X, Ji ZL, Chen YZ: TTD: Therapeutic Target Database. Nucleic Acids Res. 2002 Jan 1;30(1):412-5. [11752352 ]
General function:
Involved in transferase activity, transferring hexosyl groups
Specific function:
UDP-glucuronosyltransferases catalyze phase II biotransformation reactions in which lipophilic substrates are conjugated with glucuronic acid to increase water solubility and enhance excretion. They are of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds (By similarity).
Gene Name:
UGT2A3
Uniprot ID:
Q6UWM9
Molecular weight:
60253.94
Reactions
Morphine + Uridine diphosphate glucuronic acid → Morphine-3-glucuronide + Uridine 5'-diphosphatedetails
Morphine + Uridine diphosphate glucuronic acid → Morphine-6-glucuronide + Uridine 5'-diphosphatedetails
General function:
Involved in G-protein coupled receptor protein signaling pathway
Specific function:
Inhibits neurotransmitter release by reducing calcium ion currents and increasing potassium ion conductance. Receptor for dynorphins. May play a role in arousal and regulation of autonomic and neuroendocrine functions
Gene Name:
OPRK1
Uniprot ID:
P41145
Molecular weight:
42644.7
References
  1. Overington JP, Al-Lazikani B, Hopkins AL: How many drug targets are there? Nat Rev Drug Discov. 2006 Dec;5(12):993-6. [17139284 ]
  2. Imming P, Sinning C, Meyer A: Drugs, their targets and the nature and number of drug targets. Nat Rev Drug Discov. 2006 Oct;5(10):821-34. [17016423 ]
  3. Leventhal L, Silva RM, Rossi GC, Pasternak GW, Bodnar RJ: Morphine-6beta-glucuronide-induced hyperphagia: characterization of opioid action by selective antagonists and antisense mapping in rats. J Pharmacol Exp Ther. 1998 Nov;287(2):538-44. [9808678 ]
  4. Kozak CA, Filie J, Adamson MC, Chen Y, Yu L: Murine chromosomal location of the mu and kappa opioid receptor genes. Genomics. 1994 Jun;21(3):659-61. [7959748 ]
  5. Teodorov E, Modena CC, Sukikara MH, Felicio LF: Preliminary study of the effects of morphine treatment on opioid receptor gene expression in brain structures of the female rat. Neuroscience. 2006 Sep 1;141(3):1225-31. Epub 2006 Jun 6. [16753266 ]

Transporters

General function:
Involved in ATP binding
Specific function:
Energy-dependent efflux pump responsible for decreased drug accumulation in multidrug-resistant cells
Gene Name:
ABCB1
Uniprot ID:
P08183
Molecular weight:
141477.3
References
  1. Schwab D, Fischer H, Tabatabaei A, Poli S, Huwyler J: Comparison of in vitro P-glycoprotein screening assays: recommendations for their use in drug discovery. J Med Chem. 2003 Apr 24;46(9):1716-25. [12699389 ]
  2. Troutman MD, Thakker DR: Novel experimental parameters to quantify the modulation of absorptive and secretory transport of compounds by P-glycoprotein in cell culture models of intestinal epithelium. Pharm Res. 2003 Aug;20(8):1210-24. [12948019 ]