[English] 日本語
Yorodumi
- EMDB-66630: Human GPR30 -Gq complex G-protein focused -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: EMDB / ID: EMD-66630
TitleHuman GPR30 -Gq complex G-protein focused
Map data
Sample
  • Complex: Human GPR30 -Gq complex
    • Complex: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Complex: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Complex: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2,Guanine nucleotide-binding protein G(i) subunit alpha-2,Guanine nucleotide-binding protein G(s) subunit alpha isoforms XLas
    • Complex: GPR30, LgBiT, EGFP
    • Complex: scFv16
KeywordsReceptor / GPCR / Complex / MEMBRANE PROTEIN
Biological speciesHomo sapiens (human) / Rattus norvegicus (Norway rat) / Mus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.99 Å
AuthorsKaneda S / Akasaka H / Oshima HS / Shihoya S / Nureki O
Funding support Japan, 1 items
OrganizationGrant numberCountry
Japan Society for the Promotion of Science (JSPS)21H05037 Japan
CitationJournal: Elife / Year: 2026
Title: Cryo-EM structure of the bicarbonate receptor GPR30.
Authors: Shota Kaneda / Airi Jo-Watanabe / Hiroaki Akasaka / Hidetaka S Oshima / Takehiko Yokomizo / Wataru Shihoya / Osamu Nureki /
Abstract: G-protein-coupled receptor 30 (GPR30) is a bicarbonate receptor that plays a vital role in cellular responses to extracellular pH and ion homeostasis. Despite its significance, the mechanisms by ...G-protein-coupled receptor 30 (GPR30) is a bicarbonate receptor that plays a vital role in cellular responses to extracellular pH and ion homeostasis. Despite its significance, the mechanisms by which GPR30 interacts with bicarbonate ions remain elusive. There is no consensus on a drug that targets GPR30, and difficulties in pharmacological analyses have limited biological and drug discovery research on GPR30. Here, we present the cryo-electron microscopy structure of human GPR30 in the presence of bicarbonate ions at 3.15 Å resolution. Our structure reveals unique extracellular pockets and critical residues for bicarbonate binding and activation. Functional assays demonstrate that mutations in these residues impair bicarbonate-induced GPR30 activation, underscoring their importance in receptor function. This study also provides insights into G-protein coupling, highlighting the structural divergence between GPR30 and other G-protein-coupled receptors (GPCRs). Our findings not only advance the understanding of the role of GPR30 in pH homeostasis but also pave the way for the development of high-affinity drugs targeting GPR30 for therapeutic interventions in diseases associated with acid-base imbalance.
History
DepositionOct 16, 2025-
Header (metadata) releaseAug 26, 2026-
Map releaseAug 26, 2026-
UpdateAug 26, 2026-
Current statusAug 26, 2026Processing site: PDBj / Status: Released

-
Structure visualization

Supplemental images

emd_66630.png

Downloads & links

-
Map

FileDownload / File: emd_66630.map.gz / Format: CCP4 / Size: 30.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.16 Å/pix.
x 200 pix.
= 232. Å		1.16 Å/pix.
x 200 pix.
= 232. Å		1.16 Å/pix.
x 200 pix.
= 232. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.16 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0611
Minimum - Maximum-0.12938827 - 0.32033196
Average (Standard dev.)0.00069474673 (±0.009280978)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions200200200
Spacing200200200
CellA=B=C: 232.0 Å
α=β=γ: 90.0 °

-
Supplemental data

-
Half map: #1

Fileemd_66630_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Half map: #2

Fileemd_66630_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Sample components

-
Entire : Human GPR30 -Gq complex

EntireName: Human GPR30 -Gq complex
Components
  • Complex: Human GPR30 -Gq complex
    • Complex: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
    • Complex: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
    • Complex: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2,Guanine nucleotide-binding protein G(i) subunit alpha-2,Guanine nucleotide-binding protein G(s) subunit alpha isoforms XLas
    • Complex: GPR30, LgBiT, EGFP
    • Complex: scFv16

-
Supramolecule #1: Human GPR30 -Gq complex

SupramoleculeName: Human GPR30 -Gq complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5

-
Supramolecule #2: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1

SupramoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)

-
Supramolecule #3: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2

SupramoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2
type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2
Source (natural)Organism: Rattus norvegicus (Norway rat)

-
Supramolecule #4: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2...

SupramoleculeName: Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2,Guanine nucleotide-binding protein G(i) subunit alpha-2,Guanine nucleotide-binding protein G(s) subunit alpha isoforms XLas
type: complex / ID: 4 / Parent: 1 / Macromolecule list: #3
Source (natural)Organism: Homo sapiens (human)

-
Supramolecule #5: GPR30, LgBiT, EGFP

SupramoleculeName: GPR30, LgBiT, EGFP / type: complex / ID: 5 / Parent: 1 / Macromolecule list: #4
Source (natural)Organism: Homo sapiens (human)

-
Supramolecule #6: scFv16

SupramoleculeName: scFv16 / type: complex / ID: 6 / Parent: 1 / Macromolecule list: #5
Source (natural)Organism: Mus musculus (house mouse)

-
Experimental details

-
Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

-
Sample preparation

BufferpH: 8
VitrificationCryogen name: ETHANE

-
Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 50.66 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.6 µm / Nominal defocus min: 0.8 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

+
Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.99 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 4) / Number images used: 522404
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more