[English] 日本語
Yorodumi
- PDB-8ddr: cryo-EM structure of TRPM3 ion channel in the absence of PIP2 -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: PDB / ID: 8ddr
Titlecryo-EM structure of TRPM3 ion channel in the absence of PIP2
Components
  • Transient receptor potential cation channel, subfamily M, member 3
  • Unidentified segment at the N-terminus of TRPM3
KeywordsMEMBRANE PROTEIN / TRPM3 / ion channel / PIP2
Function / homology
Function and homology information


monoatomic cation transmembrane transport / monoatomic cation transport / monoatomic cation channel activity / protein tetramerization / calcium ion transmembrane transport / calcium channel activity / membrane
Similarity search - Function
TRPM, tetramerisation domain / TRPM, tetramerisation domain superfamily / Tetramerisation domain of TRPM / TRPM, SLOG domain / SLOG in TRPM / Ion transport domain / Ion transport protein
Similarity search - Domain/homology
1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE / Transient receptor potential cation channel, subfamily M, member 3
Similarity search - Component
Biological speciesMus musculus (house mouse)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsZhao, C. / MacKinnon, R.
Funding support United States, 1items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
CitationJournal: Neuron / Year: 2023
Title: Structural and functional analyses of a GPCR-inhibited ion channel TRPM3.
Authors: Chen Zhao / Roderick MacKinnon /
Abstract: G-protein coupled receptors (GPCRs) govern the physiological response to stimuli by modulating the activity of downstream effectors, including ion channels. TRPM3 is an ion channel inhibited by GPCRs ...G-protein coupled receptors (GPCRs) govern the physiological response to stimuli by modulating the activity of downstream effectors, including ion channels. TRPM3 is an ion channel inhibited by GPCRs through direct interaction with G protein (Gβγ) released upon their activation. This GPCR-TRPM3 signaling pathway contributes to the analgesic effect of morphine. Here, we characterized Gβγ inhibition of TRPM3 using electrophysiology and single particle cryo-electron microscopy (cryo-EM). From electrophysiology, we obtained a half inhibition constant (IC50) of ∼240 nM. Using cryo-EM, we determined structures of mouse TRPM3 expressed in human cells with and without Gβγ and with and without PIP, a lipid required for TRPM3 activity, at resolutions of 2.7-4.7 Å. Gβγ-TRPM3 interfaces vary depending on PIP occupancy; however, in all cases, Gβγ appears loosely attached to TRPM3. The IC50 in electrophysiology experiments raises the possibility that additional unknown factors may stabilize the TRPM3-Gβγ complex.
History
DepositionJun 18, 2022Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 2, 2022Provider: repository / Type: Initial release
Revision 1.1Nov 9, 2022Group: Database references / Category: citation / Item: _citation.pdbx_database_id_PubMed / _citation.title
Revision 1.2Jan 18, 2023Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.year

-
Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

-
Assembly

Deposited unit
A: Transient receptor potential cation channel, subfamily M, member 3
E: Unidentified segment at the N-terminus of TRPM3
B: Transient receptor potential cation channel, subfamily M, member 3
F: Unidentified segment at the N-terminus of TRPM3
C: Transient receptor potential cation channel, subfamily M, member 3
G: Unidentified segment at the N-terminus of TRPM3
D: Transient receptor potential cation channel, subfamily M, member 3
H: Unidentified segment at the N-terminus of TRPM3
hetero molecules


Theoretical massNumber of molelcules
Total (without water)629,50218
Polymers624,4578
Non-polymers5,04510
Water0
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_5551

-
Components

#1: Protein
Transient receptor potential cation channel, subfamily M, member 3


Mass: 154649.328 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Gene: Trpm3 / Production host: Homo sapiens (human) / References: UniProt: Q5F4S7
#2: Protein/peptide
Unidentified segment at the N-terminus of TRPM3


Mass: 1464.797 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Details: a segment at the N-terminus of TRPM3 whose sequence cannot be identified from the cryo-EM density
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Homo sapiens (human)
#3: Chemical
ChemComp-3PH / 1,2-DIACYL-GLYCEROL-3-SN-PHOSPHATE / PHOSPHATIDIC ACID / Phosphatidic acid


Mass: 704.998 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C39H77O8P
#4: Chemical
ChemComp-9Z9 / (3beta,14beta,17beta,25R)-3-[4-methoxy-3-(methoxymethyl)butoxy]spirost-5-en


Mass: 544.805 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C34H56O5 / Comment: detergent*YM
#5: Chemical ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Na
Has ligand of interestN

-
Experimental details

-
Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

-
Sample preparation

ComponentName: TRPM3 / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Mus musculus (house mouse)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 8.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

-
Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2500 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 73 e/Å2 / Film or detector model: GATAN K2 IS (4k x 4k)

-
Processing

SoftwareName: PHENIX / Version: 1.20.1_4487: / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C4 (4 fold cyclic)
3D reconstructionResolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 32631 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00232868
ELECTRON MICROSCOPYf_angle_d0.49644452
ELECTRON MICROSCOPYf_dihedral_angle_d10.6912196
ELECTRON MICROSCOPYf_chiral_restr0.0374956
ELECTRON MICROSCOPYf_plane_restr0.0035532

+
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