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- EMDB-43734: GR89,696 bound Kappa Opioid Receptor in complex with gustducin -

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Basic information

Entry
Database: EMDB / ID: EMD-43734
TitleGR89,696 bound Kappa Opioid Receptor in complex with gustducin
Map data
Sample
  • Complex: GR89,696 bound Kappa Opioid Receptor in complex with gustducin
KeywordsGPCR / Kappa opioid receptor / G protein / MEMBRANE PROTEIN
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.72 Å
AuthorsFay JF / Che T
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM143061 United States
CitationJournal: Nature / Year: 2023
Title: Ligand and G-protein selectivity in the κ-opioid receptor.
Authors: Jianming Han / Jingying Zhang / Antonina L Nazarova / Sarah M Bernhard / Brian E Krumm / Lei Zhao / Jordy Homing Lam / Vipin A Rangari / Susruta Majumdar / David E Nichols / Vsevolod ...Authors: Jianming Han / Jingying Zhang / Antonina L Nazarova / Sarah M Bernhard / Brian E Krumm / Lei Zhao / Jordy Homing Lam / Vipin A Rangari / Susruta Majumdar / David E Nichols / Vsevolod Katritch / Peng Yuan / Jonathan F Fay / Tao Che /
Abstract: The κ-opioid receptor (KOR) represents a highly desirable therapeutic target for treating not only pain but also addiction and affective disorders. However, the development of KOR analgesics has ...The κ-opioid receptor (KOR) represents a highly desirable therapeutic target for treating not only pain but also addiction and affective disorders. However, the development of KOR analgesics has been hindered by the associated hallucinogenic side effects. The initiation of KOR signalling requires the G-family proteins including the conventional (G, G, G, G and G) and nonconventional (G and G) subtypes. How hallucinogens exert their actions through KOR and how KOR determines G-protein subtype selectivity are not well understood. Here we determined the active-state structures of KOR in a complex with multiple G-protein heterotrimers-G, G, G and G-using cryo-electron microscopy. The KOR-G-protein complexes are bound to hallucinogenic salvinorins or highly selective KOR agonists. Comparisons of these structures reveal molecular determinants critical for KOR-G-protein interactions as well as key elements governing G-family subtype selectivity and KOR ligand selectivity. Furthermore, the four G-protein subtypes display an intrinsically different binding affinity and allosteric activity on agonist binding at KOR. These results provide insights into the actions of opioids and G-protein-coupling specificity at KOR and establish a foundation to examine the therapeutic potential of pathway-selective agonists of KOR.
History
DepositionFeb 19, 2024-
Header (metadata) releaseMar 13, 2024-
Map releaseMar 13, 2024-
UpdateMar 13, 2024-
Current statusMar 13, 2024Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_43734.png

Downloads & links

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Map

FileDownload / File: emd_43734.map.gz / Format: CCP4 / Size: 91.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 0.88 Å
Density
Contour LevelBy AUTHOR: 0.6
Minimum - Maximum-10.648073999999999 - 11.366794000000001
Average (Standard dev.)-0.004019152 (±0.10117406)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions288288288
Spacing288288288
CellA=B=C: 253.44 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #1

Fileemd_43734_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_43734_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : GR89,696 bound Kappa Opioid Receptor in complex with gustducin

EntireName: GR89,696 bound Kappa Opioid Receptor in complex with gustducin
Components
  • Complex: GR89,696 bound Kappa Opioid Receptor in complex with gustducin

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Supramolecule #1: GR89,696 bound Kappa Opioid Receptor in complex with gustducin

SupramoleculeName: GR89,696 bound Kappa Opioid Receptor in complex with gustducin
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5
Source (natural)Organism: Homo sapiens (human)

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.5
VitrificationCryogen name: ETHANE-PROPANE

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Electron microscopy

MicroscopeFEI TALOS ARCTICA
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2.3000000000000003 µm / Nominal defocus min: 0.4 µm
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Number real images: 5752 / Average electron dose: 29.07 e/Å2
Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company

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Image processing

Startup modelType of model: NONE
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.72 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 725000

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