P33535 (OPRM_RAT) Reviewed, UniProtKB/Swiss-Prot
Last modified
April 3, 2013.
Version 110.
History...
Names·Attributes·General annotation·Ontologies·Interactions·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Interactions·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Mu-type opioid receptor Short name=M-OR-1 Short name=MOR-1 Alternative name(s): Opioid receptor B | ||||
| Gene names |
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| Organism | Rattus norvegicus (Rat) [Reference proteome] | ||||
| Taxonomic identifier | 10116 [NCBI] | ||||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Glires › Rodentia › Sciurognathi › Muroidea › Muridae › Murinae › Rattus![]() |
Protein attributes
| Sequence length | 398 AA. |
| Sequence status | Complete. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | Receptor for endogenous opioids such as beta-endorphin and endomorphin. 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. Heterooligomerization with other GPCRs can modulate agonist binding, signaling and trafficking properties. Involved in neurogenesis. Ref.12 Ref.13 Ref.14 Ref.15 Ref.16 Ref.33 Ref.37 Ref.39 Ref.42 |
| Subunit structure | Forms homooligomers and heterooligomers with other GPCRs, such as OPRD1, OPRK1, OPRL1, NPFFR2, ADRA2A, SSTR2, CNR1 and CCR5 (probably in dimeric forms). Interacts with PPL; the interaction disrupts agonist-mediated G-protein activation. Interacts (via C-terminus) with DNAJB4 (via C-terminus). Interacts with calmodulin; the interaction inhibits the constitutive activity of OPRM1; it abolishes basal and attenuates agonist-stimulated G-protein coupling. Interacts with FLNA By similarity. Interacts with PLD2. Interacts with RANBP9 and WLS By similarity. Interacts with GPM6A. Interacts with RTP4 By similarity. Interacts with SYP and GNAS. Interacts with RGS9, RGS17 and RGS20 By similarity. Interacts with RGS4. Interacts with PPP1R9B and HINT1 By similarity. Ref.21 Ref.28 Ref.29 Ref.30 Ref.31 Ref.32 Ref.34 Ref.35 Ref.36 Ref.37 Ref.40 |
| Subcellular location | |
| Tissue specificity | Brain. Is expressed in the cerebral cortex, caudate putamen, nucleus accumbens, septal nuclei, thalamus, hippocampus, and habenula. Not detected in cerebellum. |
| Post-translational modification | Phosphorylated. Differentially phosphorylated in basal and agonist-induced conditions. Agonist-mediated phosphorylation modulates receptor internalization. Phosphorylated by ADRBK1 in a agonist-dependent manner. Phosphorylation at Tyr-166 requires receptor activation, is dependent on non-receptor protein tyrosine kinase Src and results in a decrease in agonist efficacy by reducing G-protein coupling efficiency. Phosphorylated on tyrosine residues; the phosphorylation is involved in agoinist-induced G-protein-indepenedent receptor down-regulation. Phosphorylation at Ser-375 is involved in G-protein-dependent but not beta-arrestin-dependent activation of the ERK pathway. Ref.19 Ref.20 Ref.22 Ref.26 Ref.41 Ubiquitinated. A basal ubiquitination seems not to be related to degradation. Ubiquitination is increased upon formation of OPRM1:OPRD1 oligomers leading to proteasomal degradation; the ubiquitination is diminished by RTP4 By similarity. |
| Sequence similarities | Belongs to the G-protein coupled receptor 1 family. |
| Sequence caution | The sequence AAQ77387.1 differs from that shown. Reason: Frameshift at several positions. |
Ontologies
Binary interactions
With | Entry | #Exp. | IntAct | Notes |
|---|---|---|---|---|
| Gpm6a | Q812E9 | 7 | EBI-4392569,EBI-6113756 | |
| Pld2 | P70498 | 3 | EBI-4392569,EBI-6140589 | |
| Syp | P07825 | 8 | EBI-4392569,EBI-976085 | |
| Wls | Q6P689 | 2 | EBI-4392569,EBI-6113235 |
Alternative products
| This entry describes 8 isoforms produced by alternative splicing. [Align] [Select] | ||||||
| Isoform 1 (identifier: P33535-1) This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry. | ||||||
| Isoform 2 (identifier: P33535-2) Also known as: MOR1A; The sequence of this isoform differs from the canonical sequence as follows: 387-398: LENLEAETAPLP → VCAF | ||||||
| Isoform 3 (identifier: P33535-3) Also known as: MOR1R; The sequence of this isoform differs from the canonical sequence as follows: 387-398: LENLEAETAPLP → GAEL | ||||||
| Isoform 4 (identifier: P33535-4) Also known as: MOR1B; The sequence of this isoform differs from the canonical sequence as follows: 387-398: LENLEAETAPLP → KIVLF | ||||||
| Isoform 5 (identifier: P33535-5) Also known as: MOR1B2; The sequence of this isoform differs from the canonical sequence as follows: 387-398: LENLEAETAPLP → EPQSVET | ||||||
| Isoform 6 (identifier: P33535-6) Also known as: MOR1C1; The sequence of this isoform differs from the canonical sequence as follows: 387-398: LENLEAETAPLP → PALAVSVAQI...ALIYNNVNFI | ||||||
| Isoform 7 (identifier: P33535-7) Also known as: MOR-1C2; The sequence of this isoform differs from the canonical sequence as follows: 387-398: LENLEAETAPLP → PALAVSVAQI...MPAHVLVRPW | ||||||
| Isoform 8 (identifier: P33535-8) Also known as: rMOR-1D; The sequence of this isoform differs from the canonical sequence as follows: 387-398: LENLEAETAPLP → T |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||||
Molecule processing | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 398 | 398 | Mu-type opioid receptor | PRO_0000069978 | |||||||
Regions | |||||||||||
| Topological domain | 1 – 64 | 64 | Extracellular Potential | ||||||||
| Transmembrane | 65 – 94 | 30 | Helical; Name=1; Potential | ||||||||
| Topological domain | 95 – 103 | 9 | Cytoplasmic Potential | ||||||||
| Transmembrane | 104 – 121 | 18 | Helical; Name=2; Potential | ||||||||
| Topological domain | 122 – 143 | 22 | Extracellular Potential | ||||||||
| Transmembrane | 144 – 163 | 20 | Helical; Name=3; Potential | ||||||||
| Topological domain | 164 – 193 | 30 | Cytoplasmic Potential | ||||||||
| Transmembrane | 194 – 209 | 16 | Helical; Name=4; Potential | ||||||||
| Topological domain | 210 – 234 | 25 | Extracellular Potential | ||||||||
| Transmembrane | 235 – 257 | 23 | Helical; Name=5; Potential | ||||||||
| Topological domain | 258 – 280 | 23 | Cytoplasmic Potential | ||||||||
| Transmembrane | 281 – 303 | 23 | Helical; Name=6; Potential | ||||||||
| Topological domain | 304 – 311 | 8 | Extracellular Potential | ||||||||
| Transmembrane | 312 – 328 | 17 | Helical; Name=7; Potential | ||||||||
| Topological domain | 329 – 398 | 70 | Cytoplasmic Potential | ||||||||
Amino acid modifications | |||||||||||
| Modified residue | 166 | 1 | Phosphotyrosine Ref.41 | ||||||||
| Modified residue | 363 | 1 | Phosphoserine Ref.26 | ||||||||
| Modified residue | 370 | 1 | Phosphothreonine Ref.26 | ||||||||
| Modified residue | 375 | 1 | Phosphoserine Ref.26 | ||||||||
| Modified residue | 394 | 1 | Phosphothreonine Probable | ||||||||
| Lipidation | 351 | 1 | S-palmitoyl cysteine Potential | ||||||||
| Glycosylation | 9 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Glycosylation | 31 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Glycosylation | 38 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Glycosylation | 46 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Glycosylation | 53 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Disulfide bond | 140 ↔ 217 | By similarity | |||||||||
Natural variations | |||||||||||
| Alternative sequence | 387 – 398 | 12 | LENLE…TAPLP → VCAF in isoform 2. | VSP_041828 | |||||||
| Alternative sequence | 387 – 398 | 12 | LENLE…TAPLP → GAEL in isoform 3. | VSP_041829 | |||||||
| Alternative sequence | 387 – 398 | 12 | LENLE…TAPLP → KIVLF in isoform 4. | VSP_041830 | |||||||
| Alternative sequence | 387 – 398 | 12 | LENLE…TAPLP → EPQSVET in isoform 5. | VSP_041831 | |||||||
| Alternative sequence | 387 – 398 | 12 | LENLE…TAPLP → PALAVSVAQIFTGYPSPTHG EKPCKSYRDRPRPCGRTWSL KSRAESNVEHFHCGAALIYN NVNFI in isoform 6. | VSP_041832 | |||||||
| Alternative sequence | 387 – 398 | 12 | LENLE…TAPLP → PALAVSVAQIFTGYPSPTHG EKPCKSYRDRPRPCGRTWSL KSRAESNVEHFHCGAALIYN NELKIGPVSWLQMPAHVLVR PW in isoform 7. | VSP_041833 | |||||||
| Alternative sequence | 387 – 398 | 12 | LENLE…TAPLP → T in isoform 8. | VSP_041834 | |||||||
Experimental info | |||||||||||
| Mutagenesis | 91 | 1 | Y → A: Abolishes agonist-induced G-protein-independent receptor internalization; when associated with A-96, A-166 and A-336. Ref.19 | ||||||||
| Mutagenesis | 96 | 1 | Y → A: Abolishes agonist-induced G-protein-independent receptor internalization; when associated with A-91, A-166 and A-336. Ref.19 | ||||||||
| Mutagenesis | 114 | 1 | D → A or N: Impairs agonist affinity, agonist-induced inhibition of adenylate cyclase and coupling to G-proteins. Ref.14 Ref.16 | ||||||||
| Mutagenesis | 114 | 1 | D → E: No effect on inhibition of adenylate cyclase. Ref.14 Ref.16 | ||||||||
| Mutagenesis | 147 | 1 | D → A: No effect on constitutive activation. Impairs agonist affinity and agonist-induced inhibition of adenylate cyclase. Ref.14 Ref.23 | ||||||||
| Mutagenesis | 147 | 1 | D → E: Impairs agonist affinity and increases agonist-induced inhibition of adenylate cyclase. Ref.14 Ref.23 | ||||||||
| Mutagenesis | 147 | 1 | D → N: No effect on constitutive activation. Ref.14 Ref.23 | ||||||||
| Mutagenesis | 164 | 1 | D → E: Reduces basal activity. Ref.23 | ||||||||
| Mutagenesis | 164 | 1 | D → H, M, Q or Y: Constitutive active. Ref.23 | ||||||||
| Mutagenesis | 166 | 1 | Y → A: Abolishes agonist-induced G-protein-independent receptor internalization; when associated with A-91, A-96 and A-336. Ref.19 Ref.41 | ||||||||
| Mutagenesis | 166 | 1 | Y → F: Decrease in phosphorylation, no decrease in G-protein binding. Ref.19 Ref.41 | ||||||||
| Mutagenesis | 180 | 1 | T → A: Impairs ARRB2- and ADRBK2-mediated receptor desensitization. Ref.25 | ||||||||
| Mutagenesis | 275 | 1 | L → E: No effect on constitutive activation. Some constitutive activity; when associated with K-279. Ref.27 | ||||||||
| Mutagenesis | 279 | 1 | T → D: Receptor inactivation. Ref.24 Ref.27 | ||||||||
| Mutagenesis | 279 | 1 | T → K: Constitutive active. Some constitutive activity; when associated with E-275. Ref.24 Ref.27 | ||||||||
| Mutagenesis | 297 | 1 | H → A: Impairs agonist affinity and increases agonist-induced inhibition of adenylate cyclase. Ref.14 | ||||||||
| Mutagenesis | 336 | 1 | Y → A: Abolishes agonist-induced G-protein-independent receptor internalization; when associated with A-91, A-96 and A-166. Ref.19 | ||||||||
| Mutagenesis | 346 | 1 | C → A: No change in palmitoylation. No change in palmitoylation; when associated with A-351. Ref.17 | ||||||||
| Mutagenesis | 351 | 1 | C → A: No change in palmitoylation; when associated with A-346. Ref.17 | ||||||||
| Mutagenesis | 363 | 1 | S → A: Abolishes basal phosphorylation; when associated with A-370. Abolishes basal and agonist-induced phosphorylation; when associated with A-370 and A-375. Accelerates agonist-induced receptor internalization. Ref.26 Ref.38 | ||||||||
| Mutagenesis | 370 | 1 | T → A: Abolishes basal phosphorylation; when associated with A-363. Abolishes basal and agonist-induced phosphorylation; when associated with A-363 and A-375. Accelerates agonist-induced receptor internalization. Ref.26 Ref.38 | ||||||||
| Mutagenesis | 375 | 1 | S → A: Reduces agonist-induced receptor internalization. Abolishes morphine-induced phosphorylation. Restores agonist-specific PRKCE activity. Abolishes basal and agonist-induced phosphorylation; when associated with A-363 and A-370. Ref.26 Ref.38 Ref.42 | ||||||||
| Mutagenesis | 394 | 1 | T → A: Impairs phosphorylation and abolishes agonist-mediated acute receptor desensitization. Ref.19 Ref.20 | ||||||||
| Sequence conflict | 237 | 1 | F → G in AAA79180. Ref.6 | ||||||||
| Sequence conflict | 238 | 1 | I → V in AAQ77386. Ref.7 | ||||||||
| Sequence conflict | 245 | 1 | V → I in AAA41630. Ref.3 | ||||||||
| Sequence conflict | 245 | 1 | V → I in AAA70049. Ref.4 | ||||||||
| Sequence conflict | 245 | 1 | V → I in S77863. Ref.10 | ||||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "Primary structures and expression from cDNAs of rat opioid receptor delta- and mu-subtypes." Fukuda K., Kato S., Mori K., Nishi M., Takeshima H. FEBS Lett. 327:311-314(1993) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). Tissue: Brain. |
| [2] | "Mu opiate receptor: cDNA cloning and expression." Wang J.-B., Imai Y., Epler M.C., Gregor P., Spivak C., Uhl G.R. Proc. Natl. Acad. Sci. U.S.A. 90:10230-10234(1993) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). Tissue: Brain. |
| [3] | "Molecular cloning and functional expression of a mu-opioid receptor from rat brain." Chen Y., Mestek A., Liu J., Hurley J.A., Yu L. Mol. Pharmacol. 44:8-12(1993) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). Tissue: Brain. |
| [4] | Bunzow J.R., Grandy D.K., Kelly M. Submitted (SEP-1993) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). Strain: Sprague-Dawley. Tissue: Brain. |
| [5] | "Cloning and pharmacological characterization of a rat mu opioid receptor." Thompson R.C., Mansour A., Akil H., Watson S.J. Neuron 11:903-913(1993) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). Strain: Sprague-Dawley. Tissue: Olfactory bulb. |
| [6] | "Cloning, characterization, and distribution of a mu-opioid receptor in rat brain." Zastawny R.L., George S.R., Nguyen T., Cheng R., Tsatsos J., Briones-Urbina R., O'Dowd B.F. J. Neurochem. 62:2099-2105(1994) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). Tissue: Brain. |
| [7] | "Identification and characterization of two new alternatively spliced variants from the rat mu opioid receptor gene, Oprm." Pan Y.-X., Xu J., Pasternak G.W. Submitted (MAY-2003) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORMS 3 AND 5). Strain: Sprague-Dawley. |
| [8] | "Identification of three new alternatively spliced variants of the rat mu opioid receptor gene: dissociation of affinity and efficacy." Pasternak D.A., Pan L., Xu J., Yu R., Xu M.M., Pasternak G.W., Pan Y.X. J. Neurochem. 91:881-890(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORMS 2; 6; 7 AND 8). Strain: Sprague-Dawley. |
| [9] | "Genome sequence of the Brown Norway rat yields insights into mammalian evolution." Gibbs R.A., Weinstock G.M., Metzker M.L., Muzny D.M., Sodergren E.J., Scherer S., Scott G., Steffen D., Worley K.C., Burch P.E., Okwuonu G., Hines S., Lewis L., Deramo C., Delgado O., Dugan-Rocha S., Miner G., Morgan M. Collins F.S.Nature 428:493-521(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: Brown Norway. |
| [10] | "Complementary DNA cloning of a mu-opioid receptor from rat peritoneal macrophages." Sedqi M., Roy S., Ramakrishnan S., Elde R., Loh H.H. Biochem. Biophys. Res. Commun. 209:563-574(1995) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 101-340. Tissue: Macrophage. |
| [11] | "Cloning and expression of an isoform of the rat mu opioid receptor (rMOR1B) which differs in agonist induced desensitization from rMOR1." Zimprich A., Simon T., Hoellt V. FEBS Lett. 359:142-146(1995) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 356-398 (ISOFORM 4). |
| [12] | "Activation of mu opioid receptors inhibits transient high- and low-threshold Ca2+ currents, but spares a sustained current." Schroeder J.E., Fischbach P.S., Zheng D., McCleskey E.W. Neuron 6:13-20(1991) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION. |
| [13] | "Inhibition of Ca2+ currents by a mu-opioid in a defined subset of rat sensory neurons." Schroeder J.E., McCleskey E.W. J. Neurosci. 13:867-873(1993) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION. |
| [14] | "-mu opiate receptor. Charged transmembrane domain amino acids are critical for agonist recognition and intrinsic activity." Surratt C.K., Johnson P.S., Moriwaki A., Seidleck B.K., Blaschak C.J., Wang J.B., Uhl G.R. J. Biol. Chem. 269:20548-20553(1994) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION, MUTAGENESIS OF ASP-114; ASP-147 AND HIS-297. |
| [15] | "Activation of type II adenylyl cyclase by the cloned mu-opioid receptor: coupling to multiple G proteins." Chan J.S., Chiu T.T., Wong Y.H. J. Neurochem. 65:2682-2689(1995) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION, COUPLING TO G-PROTEINS. |
| [16] | "The mu-opioid receptor down-regulates differently from the delta-opioid receptor: requirement of a high affinity receptor/G protein complex formation." Chakrabarti S., Yang W., Law P.Y., Loh H.H. Mol. Pharmacol. 52:105-113(1997) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION, MUTAGENESIS OF ASP-114. |
| [17] | "Palmitoylation of the rat mu opioid receptor." Chen C., Shahabi V., Xu W., Liu-Chen L.Y. FEBS Lett. 441:148-152(1998) [PubMed] [Europe PMC] [Abstract] Cited for: PALMITOYLATION, MUTAGENESIS OF CYS-346 AND CYS-351. |
| [18] | "Differential coupling of mu-, delta-, and kappa-opioid receptors to G alpha16-mediated stimulation of phospholipase C." Lee J.W., Joshi S., Chan J.S., Wong Y.H. J. Neurochem. 70:2203-2211(1998) [PubMed] [Europe PMC] [Abstract] Cited for: COUPLING TO GNA15. |
| [19] | "Agonist-induced, G protein-dependent and -independent down-regulation of the mu opioid receptor. The receptor is a direct substrate for protein-tyrosine kinase." Pak Y., O'Dowd B.F., Wang J.B., George S.R. J. Biol. Chem. 274:27610-27616(1999) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION, MUTAGENESIS OF TYR-91; TYR-96; TYR-166; TYR-336 AND THR-394. |
| [20] | "Role for the C-terminus in agonist-induced mu opioid receptor phosphorylation and desensitization." Deng H.B., Yu Y., Pak Y., O'Dowd B.F., George S.R., Surratt C.K., Uhl G.R., Wang J.B. Biochemistry 39:5492-5499(2000) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION AT THR-394, MUTAGENESIS OF THR-394. |
| [21] | "Oligomerization of mu- and delta-opioid receptors. Generation of novel functional properties." George S.R., Fan T., Xie Z., Tse R., Tam V., Varghese G., O'Dowd B.F. J. Biol. Chem. 275:26128-26135(2000) [PubMed] [Europe PMC] [Abstract] Cited for: RECEPTOR HETEROOLIGOMERIZATION, INTERACTION WITH OPRD1. |
| [22] | "Mutational analysis of Gbetagamma and phospholipid interaction with G protein-coupled receptor kinase 2." Carman C.V., Barak L.S., Chen C., Liu-Chen L.Y., Onorato J.J., Kennedy S.P., Caron M.G., Benovic J.L. J. Biol. Chem. 275:10443-10452(2000) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION BY ADRBK1. |
| [23] | "Constitutive activation of the mu opioid receptor by mutation of D3.49(164), but not D3.32(147): D3.49(164) is critical for stabilization of the inactive form of the receptor and for its expression." Li J., Huang P., Chen C., de Riel J.K., Weinstein H., Liu-Chen L.Y. Biochemistry 40:12039-12050(2001) [PubMed] [Europe PMC] [Abstract] Cited for: MUTAGENESIS OF ASP-147 AND ASP-164. |
| [24] | "Functional role of a conserved motif in TM6 of the rat mu opioid receptor: constitutively active and inactive receptors result from substitutions of Thr6.34(279) with Lys and Asp." Huang P., Li J., Chen C., Visiers I., Weinstein H., Liu-Chen L.Y. Biochemistry 40:13501-13509(2001) [PubMed] [Europe PMC] [Abstract] Cited for: MUTAGENESIS OF THR-279. |
| [25] | "Threonine 180 is required for G-protein-coupled receptor kinase 3- and beta-arrestin 2-mediated desensitization of the mu-opioid receptor in Xenopus oocytes." Celver J.P., Lowe J., Kovoor A., Gurevich V.V., Chavkin C. J. Biol. Chem. 276:4894-4900(2001) [PubMed] [Europe PMC] [Abstract] Cited for: MUTAGENESIS OF THR-180. |
| [26] | "Phosphorylation of Ser363, Thr370, and Ser375 residues within the carboxyl tail differentially regulates mu-opioid receptor internalization." El Kouhen R., Burd A.L., Erickson-Herbrandson L.J., Chang C.Y., Law P.Y., Loh H.H. J. Biol. Chem. 276:12774-12780(2001) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION AT SER-363; THR-370 AND SER-375, MUTAGENESIS OF SER-363; THR-370 AND SER-375. |
| [27] | "The local environment at the cytoplasmic end of TM6 of the mu opioid receptor differs from those of rhodopsin and monoamine receptors: introduction of an ionic lock between the cytoplasmic ends of helices 3 and 6 by a L6.30(275)E mutation inactivates the mu opioid receptor and reduces the constitutive activity of its T6.34(279)K mutant." Huang P., Visiers I., Weinstein H., Liu-Chen L.Y. Biochemistry 41:11972-11980(2002) [PubMed] [Europe PMC] [Abstract] Cited for: MUTAGENESIS OF LEU-275 AND THR-279. |
| [28] | "Heterodimerization of somatostatin and opioid receptors cross-modulates phosphorylation, internalization, and desensitization." Pfeiffer M., Koch T., Schroder H., Laugsch M., Hollt V., Schulz S. J. Biol. Chem. 277:19762-19772(2002) [PubMed] [Europe PMC] [Abstract] Cited for: RECEPTOR HETEROOLIGOMERIZATION, INTERACTION WITH SSTR2. |
| [29] | "ADP-ribosylation factor-dependent phospholipase D2 activation is required for agonist-induced mu-opioid receptor endocytosis." Koch T., Brandenburg L.O., Schulz S., Liang Y., Klein J., Hollt V. J. Biol. Chem. 278:9979-9985(2003) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH PLD2. |
| [30] | "Functional interactions between mu opioid and alpha 2A-adrenergic receptors." Jordan B.A., Gomes I., Rios C., Filipovska J., Devi L.A. Mol. Pharmacol. 64:1317-1324(2003) [PubMed] [Europe PMC] [Abstract] Cited for: RECEPTOR HETEROOLIGOMERIZATION, INTERACTION WITH ADRA2A. |
| [31] | "Heterodimerization and cross-desensitization between the mu-opioid receptor and the chemokine CCR5 receptor." Chen C., Li J., Bot G., Szabo I., Rogers T.J., Liu-Chen L.Y. Eur. J. Pharmacol. 483:175-186(2004) [PubMed] [Europe PMC] [Abstract] Cited for: RECEPTOR HETEROOLIGOMERIZATION, INTERACTION WITH CCR5. |
| [32] | "Biochemical demonstration of mu-opioid receptor association with Gsalpha: enhancement following morphine exposure." Chakrabarti S., Regec A., Gintzler A.R. Brain Res. Mol. Brain Res. 135:217-224(2005) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH GNAS. |
| [33] | "Mu and kappa opioid receptors activate ERK/MAPK via different protein kinase C isoforms and secondary messengers in astrocytes." Belcheva M.M., Clark A.L., Haas P.D., Serna J.S., Hahn J.W., Kiss A., Coscia C.J. J. Biol. Chem. 280:27662-27669(2005) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION. |
| [34] | "Receptor heterodimerization leads to a switch in signaling: beta-arrestin2-mediated ERK activation by mu-delta opioid receptor heterodimers." Rozenfeld R., Devi L.A. FASEB J. 21:2455-2465(2007) [PubMed] [Europe PMC] [Abstract] Cited for: RECEPTOR HETEROOLIGOMERIZATION, INTERACTION WITH OPRD1. |
| [35] | "Membrane glycoprotein M6a interacts with the micro-opioid receptor and facilitates receptor endocytosis and recycling." Wu D.F., Koch T., Liang Y.J., Stumm R., Schulz S., Schroder H., Hollt V. J. Biol. Chem. 282:22239-22247(2007) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH GPM6A. |
| [36] | "Interaction of the mu-opioid receptor with synaptophysin influences receptor trafficking and signaling." Liang Y.J., Wu D.F., Yang L.Q., Hollt V., Koch T. Mol. Pharmacol. 71:123-131(2007) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH SYP. |
| [37] | "mu opioid and CB1 cannabinoid receptor interactions: reciprocal inhibition of receptor signaling and neuritogenesis." Rios C., Gomes I., Devi L.A. Br. J. Pharmacol. 148:387-395(2006) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION, RECEPTOR HETEROOLIGOMERIZATION, INTERACTION WITH CNR1. |
| [38] | "Morphine-induced mu-opioid receptor rapid desensitization is independent of receptor phosphorylation and beta-arrestins." Chu J., Zheng H., Loh H.H., Law P.Y. Cell. Signal. 20:1616-1624(2008) [PubMed] [Europe PMC] [Abstract] Cited for: MUTAGENESIS OF SER-363; THR-370 AND SER-375. |
| [39] | "Beta-arrestin-dependent mu-opioid receptor-activated extracellular signal-regulated kinases (ERKs) Translocate to Nucleus in Contrast to G protein-dependent ERK activation." Zheng H., Loh H.H., Law P.Y. Mol. Pharmacol. 73:178-190(2008) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION. |
| [40] | "Regulator of G protein signaling 4 confers selectivity to specific G proteins to modulate mu- and delta-opioid receptor signaling." Leontiadis L.J., Papakonstantinou M.P., Georgoussi Z. Cell. Signal. 21:1218-1228(2009) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH RGS4. |
| [41] | "Phosphorylation of the mu-opioid receptor at tyrosine 166 (Tyr3.51) in the DRY motif reduces agonist efficacy." Clayton C.C., Bruchas M.R., Lee M.L., Chavkin C. Mol. Pharmacol. 77:339-347(2010) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION AT TYR-166, MUTAGENESIS OF TYR-166. |
| [42] | "Modulating micro-opioid receptor phosphorylation switches agonist-dependent signaling as reflected in PKCepsilon activation and dendritic spine stability." Zheng H., Chu J., Zhang Y., Loh H.H., Law P.Y. J. Biol. Chem. 286:12724-12733(2011) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION, MUTAGENESIS OF SER-375. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | D16349 mRNA. Translation: BAA03852.1. L20684 mRNA. Translation: AAA41643.1. L13069 mRNA. Translation: AAA41630.1. U02083 mRNA. Translation: AAA70049.1. L22455 mRNA. Translation: AAA16075.1. U35424 mRNA. Translation: AAA79180.1. AY309003 mRNA. Translation: AAQ77387.1. Frameshift. AY309004 mRNA. Translation: AAQ77388.1. AY225402 mRNA. Translation: AAP44725.1. AY225403 mRNA. Translation: AAP44726.1. AY309000 mRNA. Translation: AAQ77384.1. AY309002 mRNA. Translation: AAQ77386.1. S77863 mRNA. No translation available. S75669 mRNA. Translation: AAB33530.2. |
| IPI | IPI00655338. |
| PIR | I56504. I56517. S69010. |
| RefSeq | NP_001033686.1. NM_001038597.2. NP_001033688.2. NM_001038599.2. NP_001033689.1. NM_001038600.2. NP_001033690.1. NM_001038601.2. NP_037203.1. NM_013071.2. |
| UniGene | Rn.10118. |
3D structure databases | |
| ProteinModelPortal | P33535. |
| ModBase | Search... |
Protein-protein interaction databases | |
| IntAct | P33535. 6 interactions. |
| STRING | 10116.ENSRNOP00000057371. |
Protein family/group databases | |
| GPCRDB | Search... |
PTM databases | |
| PhosphoSite | P33535. |
Protocols and materials databases | |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| Ensembl | ENSRNOT00000024682; ENSRNOP00000024682; ENSRNOG00000018191. ENSRNOT00000051837; ENSRNOP00000051290; ENSRNOG00000018191. |
| GeneID | 25601. |
| KEGG | rno:25601. |
Organism-specific databases | |
| CTD | 4988. |
| RGD | 3234. Oprm1. |
Phylogenomic databases | |
| eggNOG | NOG279457. |
| GeneTree | ENSGT00630000089574. |
| HOGENOM | HOG000230486. |
| HOVERGEN | HBG106919. |
| InParanoid | Q4VWX8. |
| KO | K04215. |
| OrthoDB | EOG4KD6MF. |
Gene expression databases | |
| ArrayExpress | P33535. |
| Genevestigator | P33535. |
| GermOnline | ENSRNOG00000018191. Rattus norvegicus. |
Family and domain databases | |
| InterPro | IPR000276. GPCR_Rhodpsn. IPR017452. GPCR_Rhodpsn_7TM. IPR000105. Mu_opioid_rcpt. IPR001418. Opioid_rcpt. [Graphical view] |
| Pfam | PF00001. 7tm_1. 1 hit. [Graphical view] |
| PRINTS | PR00237. GPCRRHODOPSN. PR00537. MUOPIOIDR. PR00384. OPIOIDR. |
| PROSITE | PS00237. G_PROTEIN_RECEP_F1_1. 1 hit. PS50262. G_PROTEIN_RECEP_F1_2. 1 hit. [Graphical view] |
| ProtoNet | Search... |
Other | |
| BindingDB | P33535. |
| ChEMBL | CHEMBL270. |
| NextBio | 607309. |
Entry information
| Entry name | OPRM_RAT | ||||||||
| Accession | Primary (citable) accession number: P33535 Secondary accession number(s): Q2TV20 Q64120 | ||||||||
| Entry history |
| ||||||||
| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
Relevant documents
| 7-transmembrane G-linked receptors List of 7-transmembrane G-linked receptor entries |
| SIMILARITY comments Index of protein domains and families |

Clusters with
