Oxycodone (T3D2809)

General Function:

Opioid receptor activity

Specific Function:

G-protein coupled opioid receptor that functions as receptor for endogenous alpha-neoendorphins and dynorphins, but has low affinity for beta-endorphins. Also functions as receptor for various synthetic opioids and for the psychoactive diterpene salvinorin A. Ligand binding causes a conformation change that triggers signaling via guanine nucleotide-binding proteins (G proteins) and modulates the activity of down-stream effectors, such as adenylate cyclase. Signaling leads to the inhibition of adenylate cyclase activity. Inhibits neurotransmitter release by reducing calcium ion currents and increasing potassium ion conductance. Plays a role in the perception of pain. Plays a role in mediating reduced physical activity upon treatment with synthetic opioids. Plays a role in the regulation of salivation in response to synthetic opioids. May play a role in arousal and regulation of autonomic and neuroendocrine functions.

Gene Name:

OPRK1

Uniprot ID:

P41145

Molecular Weight:

42644.665 Da

References

1. Ordonez Gallego A, Gonzalez Baron M, Espinosa Arranz E: Oxycodone: a pharmacological and clinical review. Clin Transl Oncol. 2007 May;9(5):298-307. [17525040 ]
2. Riley J, Eisenberg E, Muller-Schwefe G, Drewes AM, Arendt-Nielsen L: Oxycodone: a review of its use in the management of pain. Curr Med Res Opin. 2008 Jan;24(1):175-92. [18039433 ]

General Function:

Voltage-gated calcium channel activity

Specific Function:

Receptor for endogenous opioids such as beta-endorphin and endomorphin. Receptor for natural and synthetic opioids including morphine, heroin, DAMGO, fentanyl, etorphine, buprenorphin and methadone. Agonist binding to the receptor induces coupling to an inactive GDP-bound heterotrimeric G-protein complex and subsequent exchange of GDP for GTP in the G-protein alpha subunit leading to dissociation of the G-protein complex with the free GTP-bound G-protein alpha and the G-protein beta-gamma dimer activating downstream cellular effectors. The agonist- and cell type-specific activity is predominantly coupled to pertussis toxin-sensitive G(i) and G(o) G alpha proteins, GNAI1, GNAI2, GNAI3 and GNAO1 isoforms Alpha-1 and Alpha-2, and to a lesser extend to pertussis toxin-insensitive G alpha proteins GNAZ and GNA15. They mediate an array of downstream cellular responses, including inhibition of adenylate cyclase activity and both N-type and L-type calcium channels, activation of inward rectifying potassium channels, mitogen-activated protein kinase (MAPK), phospholipase C (PLC), phosphoinositide/protein kinase (PKC), phosphoinositide 3-kinase (PI3K) and regulation of NF-kappa-B. Also couples to adenylate cyclase stimulatory G alpha proteins. The selective temporal coupling to G-proteins and subsequent signaling can be regulated by RGSZ proteins, such as RGS9, RGS17 and RGS4. Phosphorylation by members of the GPRK subfamily of Ser/Thr protein kinases and association with beta-arrestins is involved in short-term receptor desensitization. Beta-arrestins associate with the GPRK-phosphorylated receptor and uncouple it from the G-protein thus terminating signal transduction. The phosphorylated receptor is internalized through endocytosis via clathrin-coated pits which involves beta-arrestins. The activation of the ERK pathway occurs either in a G-protein-dependent or a beta-arrestin-dependent manner and is regulated by agonist-specific receptor phosphorylation. Acts as a class A G-protein coupled receptor (GPCR) which dissociates from beta-arrestin at or near the plasma membrane and undergoes rapid recycling. Receptor down-regulation pathways are varying with the agonist and occur dependent or independent of G-protein coupling. Endogenous ligands induce rapid desensitization, endocytosis and recycling whereas morphine induces only low desensitization and endocytosis. Heterooligomerization with other GPCRs can modulate agonist binding, signaling and trafficking properties. Involved in neurogenesis. Isoform 12 couples to GNAS and is proposed to be involved in excitatory effects. Isoform 16 and isoform 17 do not bind agonists but may act through oligomerization with binding-competent OPRM1 isoforms and reduce their ligand binding activity.

Gene Name:

OPRM1

Uniprot ID:

P35372

Molecular Weight:

44778.855 Da

References

1. Ordonez Gallego A, Gonzalez Baron M, Espinosa Arranz E: Oxycodone: a pharmacological and clinical review. Clin Transl Oncol. 2007 May;9(5):298-307. [17525040 ]
2. Riley J, Eisenberg E, Muller-Schwefe G, Drewes AM, Arendt-Nielsen L: Oxycodone: a review of its use in the management of pain. Curr Med Res Opin. 2008 Jan;24(1):175-92. [18039433 ]

General Function:

Opioid receptor activity

Specific Function:

G-protein coupled receptor that functions as receptor for endogenous enkephalins and for a subset of other opioids. Ligand binding causes a conformation change that triggers signaling via guanine nucleotide-binding proteins (G proteins) and modulates the activity of down-stream effectors, such as adenylate cyclase. Signaling leads to the inhibition of adenylate cyclase activity. Inhibits neurotransmitter release by reducing calcium ion currents and increasing potassium ion conductance. Plays a role in the perception of pain and in opiate-mediated analgesia. Plays a role in developing analgesic tolerance to morphine.

Gene Name:

OPRD1

Uniprot ID:

P41143

Molecular Weight:

40368.235 Da

References

1. Ordonez Gallego A, Gonzalez Baron M, Espinosa Arranz E: Oxycodone: a pharmacological and clinical review. Clin Transl Oncol. 2007 May;9(5):298-307. [17525040 ]

References

1. Smith MT: Differences between and combinations of opioids re-visited. Curr Opin Anaesthesiol. 2008 Oct;21(5):596-601. doi: 10.1097/ACO.0b013e32830a4c4a. [18784485 ]

General Function:

Not Available

Specific Function:

Functions as transport protein in the blood stream. Binds various ligands in the interior of its beta-barrel domain. Also binds synthetic drugs and influences their distribution and availability in the body. Appears to function in modulating the activity of the immune system during the acute-phase reaction.

Included Proteins:

P02763 , P19652

References

1. Leow KP, Wright AW, Cramond T, Smith MT: Determination of the serum protein binding of oxycodone and morphine using ultrafiltration. Ther Drug Monit. 1993 Oct;15(5):440-7. [8249052 ]