Mu-type opioid receptor
Homo sapiens
State in the Current Structure
| Assembly | Oligomeric State | Construct | Mutations and Modifications | Ligands, Ions and Associated Components | Method and Experimental Conditions | Structure Quality |
|---|---|---|---|---|---|---|
| 1 | Protein heterocomplex Heteromer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count | Chain F; UniProt 1–388 Chain R; UniProt 1–388 | Mutation:F158W | TYR-DAL-GLY-MEA-ETA × 2 CLR CHOLESTEROL × 8 A1D6B 3,3,6,6-tetramethyl-9-[4-[(2-methylphenyl)methoxy]phenyl]-4,5,7,9-tetrahydro-2~{H}-xanthene-1,8-dione × 2 | ELECTRON MICROSCOPY cryo-EM buffer:pH 7.5 cryo-EM vitrification conditions:Cryogen ETHANE | Resolution 3.50 Å R-free 0.402 |
Other States of the Same Protein in the Database
Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.
| Other PDB | Difference from Current Entry 10TL | Assembly / Oligomeric State | Construct | Mutations and Modifications | Ligands, Ions and Non-polymers | Method and Experimental Conditions | Structure Quality |
|---|---|---|---|---|---|---|---|
| 10TM Cryo-EM structure of MOR bound with DAMGO Deposited 2026-02-08 | Different mutation/modification Different ligand/ion Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 4 PDB declaration: tetrameric |
Chain F
1–388(388 aa)
Chain R
1–388(388 aa)
|
Not recorded | CLR CHOLESTEROL × 4 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.00 Å R-free 0.334 |
| 8EF5 Fentanyl-bound mu-opioid receptor-Gi complex Deposited 2022-09-08 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 7 PDB declaration: heptameric |
Chain M
2–368(367 aa)
Chain R
2–368(367 aa)
|
Not recorded | 7V7 N-phenyl-N-[1-(2-phenylethyl)piperidin-4-yl]propanamide × 2 CLR CHOLESTEROL × 10 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.2
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.30 Å |
| 8EF6 Morphine-bound mu-opioid receptor-Gi complex Deposited 2022-09-08 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 7 PDB declaration: heptameric |
Chain M
2–368(367 aa)
Chain R
2–368(367 aa)
|
Not recorded | MOI (7R,7AS,12BS)-3-METHYL-2,3,4,4A,7,7A-HEXAHYDRO-1H-4,12-METHANO[1]BENZOFURO[3,2-E]ISOQUINOLINE-7,9-DIOL × 2 CLR CHOLESTEROL × 10 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.2
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.20 Å |
| 8EFB Oliceridine-bound mu-opioid receptor-Gi complex Deposited 2022-09-08 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 5 PDB declaration: pentameric |
Chain R
2–368(367 aa)
|
Not recorded | WH2 N-[(3-methoxythiophen-2-yl)methyl]-2-[(9R)-9-(pyridin-2-yl)-6-oxaspiro[4.5]decan-9-yl]ethan-1-amine × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.2
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.20 Å |
| 8EFL SR17018-bound mu-opioid receptor-Gi complex Deposited 2022-09-08 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 7 PDB declaration: heptameric |
Chain M
2–368(367 aa)
Chain R
2–368(367 aa)
|
Not recorded | WH9 5,6-dichloro-1-{1-[(4-chlorophenyl)methyl]piperidin-4-yl}-1,3-dihydro-2H-benzimidazol-2-one × 2 CLR CHOLESTEROL × 10 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.2
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.20 Å |
| 8EFO PZM21-bound mu-opioid receptor-Gi complex Deposited 2022-09-08 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 7 PDB declaration: heptameric |
Chain M
2–368(367 aa)
Chain R
2–368(367 aa)
|
Not recorded | 8QY N-[(2S)-2-(dimethylamino)-3-(4-hydroxyphenyl)propyl]-N'-[(2S)-1-(thiophen-3-yl)propan-2-yl]urea × 2 CLR CHOLESTEROL × 10 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.2
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 2.80 Å |
| 8EFQ DAMGO-bound mu-opioid receptor-Gi complex Deposited 2022-09-08 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 5 PDB declaration: pentameric |
Chain R
2–368(367 aa)
|
Not recorded | ETA ETHANOLAMINE × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.2
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.30 Å |
| 8F7Q Gi bound mu-opioid receptor in complex with beta-endorphin Deposited 2022-11-20 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 9 PDB declaration: nonameric |
Chain M
2–388(387 aa)
Chain R
2–388(387 aa)
|
Not recorded | CLR CHOLESTEROL × 10 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.2
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.22 Å |
| 8F7R Gi bound mu-opioid receptor in complex with endomorphin Deposited 2022-11-20 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 9 PDB declaration: nonameric |
Chain M
2–388(387 aa)
Chain R
2–388(387 aa)
|
Not recorded | CLR CHOLESTEROL × 10 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.2
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.28 Å |
| 8K9K Full agonist-bound mu-type opioid receptor-G protein complex Deposited 2023-08-01 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics | Assembly 1 Insufficient information Heteromer;Protein × 6 PDB declaration: hexameric |
Chain R
64–362(299 aa)
|
Mutation:M7W,H102I,R106L | No recorded non-water small molecule |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 2.98 Å |
| 8K9L Full agonist- and positive allosteric modulator-bound mu-type opioid receptor-G protein complex Deposited 2023-08-01 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 6 PDB declaration: hexameric |
Chain R
64–362(299 aa)
|
Mutation:M7W,H102I,R106L,R106 | VV9 (2~{S})-2-(3-bromanyl-4-methoxy-phenyl)-3-(4-chlorophenyl)sulfonyl-1,3-thiazolidine × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.05 Å |
| 8Y72 positive allosteric modulator(BMS986122)-bound mu-opioid receptor-Gi complex Deposited 2024-02-03 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 6 PDB declaration: hexameric |
Chain R
2–388(387 aa)
|
Not recorded | CLR CHOLESTEROL × 2 VV9 (2~{S})-2-(3-bromanyl-4-methoxy-phenyl)-3-(4-chlorophenyl)sulfonyl-1,3-thiazolidine × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.2
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 2.65 Å |
| 8Y73 positive allosteric modulator(MPAM-15)-bound mu-opioid receptor-Gi complex Deposited 2024-02-03 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 6 PDB declaration: hexameric |
Chain R
2–388(387 aa)
|
Not recorded | CLR CHOLESTEROL × 2 A1D6C 9-[5-(3-chlorophenyl)furan-2-yl]-3,3,6,6-tetramethyl-4,5,7,9-tetrahydro-2~{H}-xanthene-1,8-dione × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.2
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 2.84 Å |
| 9MQH Inactive Mu-Opioid Receptor with Nb6M, NabFab, and isoquinuclidine compound #33 Deposited 2025-01-03 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
1–400(400 aa)
|
Not recorded | No recorded non-water small molecule |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.90 Å |
| 9MQI Inactive Mu-Opioid Receptor with Nb6M, NabFab, and isoquinuclidine compound #020_E1 Deposited 2025-01-03 | Different construct Different mutation/modification Different ligand/ion Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 4 PDB declaration: tetrameric |
Chain A
1–400(400 aa)
|
Not recorded | A1BNM methyl (1S,3R,4S,6S,8M)-2-[(1-ethyl-1H-pyrazol-4-yl)methyl]-8-(3-hydroxyphenyl)-3,4-dimethyl-2-azabicyclo[2.2.2]oct-7-ene-6-carboxylate × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.30 Å |
| 9MQJ Locally-refined Inactive Mu-Opioid Receptor with Nb6M, NabFab, and isoquinuclidine compound #020_E1 Deposited 2025-01-03 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
1–400(400 aa)
|
Not recorded | A1BNM methyl (1S,3R,4S,6S,8M)-2-[(1-ethyl-1H-pyrazol-4-yl)methyl]-8-(3-hydroxyphenyl)-3,4-dimethyl-2-azabicyclo[2.2.2]oct-7-ene-6-carboxylate × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.23 Å |
| 9PPQ Locally-refined Mu-Opioid Receptor bound with novel compound 0505 (3-[({[(1P)-1-(3-chlorophenyl)-1H-pyrazol-3-yl]methyl}amino)methyl]phenol) Deposited 2025-07-21 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain R
75–400(326 aa)
|
Not recorded | A1CIX 3-[({[(1P)-1-(3-chlorophenyl)-1H-pyrazol-3-yl]methyl}amino)methyl]phenol × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.34 Å |
| 9PU5 Cryo-EM structure of human MOR-Gi1 complex protein bound with DAMGO and BMS986187 Deposited 2025-07-30 | Different mutation/modification Different oligomeric state Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 10 PDB declaration: decameric |
Chain F
1–388(388 aa)
Chain R
1–388(388 aa)
|
Not recorded | CLR CHOLESTEROL × 8 A1D6B 3,3,6,6-tetramethyl-9-[4-[(2-methylphenyl)methoxy]phenyl]-4,5,7,9-tetrahydro-2~{H}-xanthene-1,8-dione × 2 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.50 Å |
| 9PUD Cryo-EM structure of MOR-Gi1 complex protein bound with DAMGO Deposited 2025-07-30 | Different oligomeric state Different ligand/ion Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 10 PDB declaration: decameric |
Chain F
1–388(388 aa)
Chain R
1–388(388 aa)
|
Mutation:F158W Mutation:F158W | CLR CHOLESTEROL × 4 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.00 Å |
| 9PXU Inactive-state naloxone-mu opioid receptor nanobody6 complex Deposited 2025-08-06 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics | Assembly 1 Insufficient information Heteromer;Protein × 5 PDB declaration: pentameric |
Chain R
2–400(399 aa)
|
Not recorded | A1APV Naloxone × 1 NA SODIUM ION × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.40 Å |
| 9PXV Nucleotide-free naloxone-mu opioid receptor Gi1 complex Deposited 2025-08-06 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics | Assembly 1 Insufficient information Heteromer;Protein × 5 PDB declaration: pentameric |
Chain R
2–400(399 aa)
|
Not recorded | CLR CHOLESTEROL × 2 A1APV Naloxone × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.02 Å |
| 9PXW Latent-state naloxone-mu opioid receptor-Gi GDPbS complex (rebound) Deposited 2025-08-06 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics | Assembly 1 Insufficient information Heteromer;Protein × 4 PDB declaration: tetrameric |
Chain R
2–400(399 aa)
|
Not recorded | VSN 5'-O-[(R)-hydroxy(thiophosphonooxy)phosphoryl]guanosine × 1 A1APV Naloxone × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.80 Å |
| 9PXX Unlatched-state naloxone-mu opioid receptor-Gi GDPbS complex (rebound) Deposited 2025-08-06 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics | Assembly 1 Insufficient information Heteromer;Protein × 4 PDB declaration: tetrameric |
Chain R
2–400(399 aa)
|
Not recorded | VSN 5'-O-[(R)-hydroxy(thiophosphonooxy)phosphoryl]guanosine × 1 CLR CHOLESTEROL × 2 A1APV Naloxone × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.10 Å |
| 9PXY Primed-state naloxone-mu opioid receptor-Gi GDPbS complex (rebound) Deposited 2025-08-06 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics | Assembly 1 Insufficient information Heteromer;Protein × 4 PDB declaration: tetrameric |
Chain R
2–400(399 aa)
|
Not recorded | CLR CHOLESTEROL × 2 A1APV Naloxone × 1 VSN 5'-O-[(R)-hydroxy(thiophosphonooxy)phosphoryl]guanosine × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.00 Å |
| 9PY2 Engaged-state loperamide-mu opioid receptor-Gi GDPbS complex (rebound) Deposited 2025-08-06 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics | Assembly 1 Insufficient information Heteromer;Protein × 4 PDB declaration: tetrameric |
Chain R
2–400(399 aa)
|
Not recorded | CLR CHOLESTEROL × 2 A1CMV 4-[4-(4-chlorophenyl)-4-hydroxypiperidin-1-yl]-N,N-dimethyl-2,2-diphenylbutanamide × 1 VSN 5'-O-[(R)-hydroxy(thiophosphonooxy)phosphoryl]guanosine × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.16 Å |
| 9PY3 Unlatched-state loperamide-mu opioid receptor-Gi GDPbS complex (rebound) Deposited 2025-08-06 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics | Assembly 1 Insufficient information Heteromer;Protein × 4 PDB declaration: tetrameric |
Chain R
2–400(399 aa)
|
Not recorded | CLR CHOLESTEROL × 2 A1CMV 4-[4-(4-chlorophenyl)-4-hydroxypiperidin-1-yl]-N,N-dimethyl-2,2-diphenylbutanamide × 1 VSN 5'-O-[(R)-hydroxy(thiophosphonooxy)phosphoryl]guanosine × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 3.20 Å |
| 9PY4 Primed-state loperamide-mu opioid receptor-Gi GDPbS complex (rebound) Deposited 2025-08-06 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics | Assembly 1 Insufficient information Heteromer;Protein × 4 PDB declaration: tetrameric |
Chain R
2–400(399 aa)
|
Not recorded | VSN 5'-O-[(R)-hydroxy(thiophosphonooxy)phosphoryl]guanosine × 1 CLR CHOLESTEROL × 2 A1CMV 4-[4-(4-chlorophenyl)-4-hydroxypiperidin-1-yl]-N,N-dimethyl-2,2-diphenylbutanamide × 1 |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.5
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 2.78 Å |
| 9WST Cryo-EM structure of DAMGO-muOR-Gz-scFv16 complex Deposited 2025-09-15 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 5 PDB declaration: pentameric |
Chain R
7–400(394 aa)
|
Not recorded | No recorded non-water small molecule |
ELECTRON MICROSCOPY
cryo-EM buffer
pH 7.4
cryo-EM vitrification conditions
Cryogen ETHANE
|
Resolution 2.80 Å |
28 other PDB entries and 28 assemblies. Open the comparison page and filter oligomeric states
View Construct and Data Evidence
| UniProt name | OPRM_HUMAN |
| Isoform | — |
| PDB entities | 1 |
| Chains and sequence ranges | Author chain F; PDBConstruct 1–388; UniProt 1–388 Author chain R; PDBConstruct 1–388; UniProt 1–388 |