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- EMDB-33022: Cryo-EM structure of the human TRPC5 ion channel in complex with ... -

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Basic information

Entry
Database: EMDB / ID: EMD-33022
TitleCryo-EM structure of the human TRPC5 ion channel in complex with G alpha i3 subunits, class1
Map data
Sample
  • Complex: TRP channel-G protein complex
    • Complex: TRP channel
      • Protein or peptide: Short transient receptor potential channel 5
    • Complex: G protein
      • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-3
  • Ligand: PHOSPHATIDYLETHANOLAMINE
  • Ligand: CHOLESTEROL HEMISUCCINATE
  • Ligand: ZINC ION
  • Ligand: CALCIUM ION
  • Ligand: (2S)-2-(hexadecanoyloxy)-3-hydroxypropyl (9Z)-octadec-9-enoate
  • Ligand: GUANOSINE-5'-TRIPHOSPHATE
Function / homology
Function and homology information


regulation of membrane hyperpolarization / phosphatidylserine exposure on apoptotic cell surface / negative regulation of dendrite morphogenesis / Role of second messengers in netrin-1 signaling / store-operated calcium channel activity / cation channel complex / inositol 1,4,5 trisphosphate binding / negative regulation of adenylate cyclase activity / actinin binding / GTP metabolic process ...regulation of membrane hyperpolarization / phosphatidylserine exposure on apoptotic cell surface / negative regulation of dendrite morphogenesis / Role of second messengers in netrin-1 signaling / store-operated calcium channel activity / cation channel complex / inositol 1,4,5 trisphosphate binding / negative regulation of adenylate cyclase activity / actinin binding / GTP metabolic process / TRP channels / G protein-coupled dopamine receptor signaling pathway / clathrin binding / positive regulation of macroautophagy / Adenylate cyclase inhibitory pathway / positive regulation of axon extension / regulation of cytosolic calcium ion concentration / calcium channel complex / positive regulation of neuron differentiation / adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway / positive regulation of peptidyl-threonine phosphorylation / G protein-coupled receptor binding / calcium ion transmembrane transport / G-protein beta/gamma-subunit complex binding / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / calcium channel activity / neuron differentiation / ADP signalling through P2Y purinoceptor 12 / G alpha (z) signalling events / ADORA2B mediated anti-inflammatory cytokines production / calcium ion transport / GPER1 signaling / GDP binding / heterotrimeric G-protein complex / nervous system development / actin binding / ATPase binding / positive regulation of cytosolic calcium ion concentration / midbody / growth cone / G alpha (i) signalling events / G alpha (s) signalling events / neuron apoptotic process / Extra-nuclear estrogen signaling / lysosomal membrane / cell division / GTPase activity / centrosome / neuronal cell body / dendrite / positive regulation of cell population proliferation / GTP binding / nucleolus / Golgi apparatus / extracellular exosome / nucleoplasm / membrane / metal ion binding / plasma membrane / cytoplasm
Similarity search - Function
Transient receptor potential channel, canonical 5 / Transient receptor ion channel domain / Transient receptor ion channel II / Transient receptor ion channel II / Transient receptor potential channel, canonical / G-protein alpha subunit, group I / Ankyrin repeat / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit ...Transient receptor potential channel, canonical 5 / Transient receptor ion channel domain / Transient receptor ion channel II / Transient receptor ion channel II / Transient receptor potential channel, canonical / G-protein alpha subunit, group I / Ankyrin repeat / Guanine nucleotide binding protein (G-protein), alpha subunit / G protein alpha subunit, helical insertion / G-protein alpha subunit / G-alpha domain profile. / G protein alpha subunit / Ankyrin repeats (3 copies) / ankyrin repeats / Ankyrin repeat / Ankyrin repeat-containing domain superfamily / Ion transport domain / Ion transport protein / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Guanine nucleotide-binding protein G(i) subunit alpha-3 / Short transient receptor potential channel 5
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.93 Å
AuthorsWon J / Jeong H / Lee HH
Funding support Korea, Republic Of, 1 items
OrganizationGrant numberCountry
Other privateSSTF-BA2101-13 Korea, Republic Of
CitationJournal: Nat Commun / Year: 2023
Title: Molecular architecture of the Gα-bound TRPC5 ion channel.
Authors: Jongdae Won / Jinsung Kim / Hyeongseop Jeong / Jinhyeong Kim / Shasha Feng / Byeongseok Jeong / Misun Kwak / Juyeon Ko / Wonpil Im / Insuk So / Hyung Ho Lee /
Abstract: G-protein coupled receptors (GPCRs) and ion channels serve as key molecular switches through which extracellular stimuli are transformed into intracellular effects, and it has long been postulated ...G-protein coupled receptors (GPCRs) and ion channels serve as key molecular switches through which extracellular stimuli are transformed into intracellular effects, and it has long been postulated that ion channels are direct effector molecules of the alpha subunit of G-proteins (Gα). However, no complete structural evidence supporting the direct interaction between Gα and ion channels is available. Here, we present the cryo-electron microscopy structures of the human transient receptor potential canonical 5 (TRPC5)-Gα complexes with a 4:4 stoichiometry in lipid nanodiscs. Remarkably, Gα binds to the ankyrin repeat edge of TRPC5 ~ 50 Å away from the cell membrane. Electrophysiological analysis shows that Gα increases the sensitivity of TRPC5 to phosphatidylinositol 4,5-bisphosphate (PIP), thereby rendering TRPC5 more easily opened in the cell membrane, where the concentration of PIP is physiologically regulated. Our results demonstrate that ion channels are one of the direct effector molecules of Gα proteins triggered by GPCR activation-providing a structural framework for unraveling the crosstalk between two major classes of transmembrane proteins: GPCRs and ion channels.
History
DepositionMar 7, 2022-
Header (metadata) releaseApr 26, 2023-
Map releaseApr 26, 2023-
UpdateMay 24, 2023-
Current statusMay 24, 2023Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_33022.png

Downloads & links

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Map

FileDownload / File: emd_33022.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.09 Å/pix.
x 320 pix.
= 348.16 Å		1.09 Å/pix.
x 320 pix.
= 348.16 Å		1.09 Å/pix.
x 320 pix.
= 348.16 Å

Surface

Projections

Slices (1/3)

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Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.088 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 1.1
Minimum - Maximum0.0 - 6.449884
Average (Standard dev.)0.0383053 (±0.16462971)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions320320320
Spacing320320320
CellA=B=C: 348.16003 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: #2

Fileemd_33022_additional_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: #1

Fileemd_33022_additional_2.map
Projections & Slices
AxesZYX

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Histogram (log scale)

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Sample components

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Entire : TRP channel-G protein complex

EntireName: TRP channel-G protein complex
Components
  • Complex: TRP channel-G protein complex
    • Complex: TRP channel
      • Protein or peptide: Short transient receptor potential channel 5
    • Complex: G protein
      • Protein or peptide: Guanine nucleotide-binding protein G(i) subunit alpha-3
  • Ligand: PHOSPHATIDYLETHANOLAMINE
  • Ligand: CHOLESTEROL HEMISUCCINATE
  • Ligand: ZINC ION
  • Ligand: CALCIUM ION
  • Ligand: (2S)-2-(hexadecanoyloxy)-3-hydroxypropyl (9Z)-octadec-9-enoate
  • Ligand: GUANOSINE-5'-TRIPHOSPHATE

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Supramolecule #1: TRP channel-G protein complex

SupramoleculeName: TRP channel-G protein complex / type: complex / ID: 1 / Chimera: Yes / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #2: TRP channel

SupramoleculeName: TRP channel / type: complex / ID: 2 / Chimera: Yes / Parent: 1 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #3: G protein

SupramoleculeName: G protein / type: complex / ID: 3 / Chimera: Yes / Parent: 1 / Macromolecule list: #2

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Macromolecule #1: Short transient receptor potential channel 5

MacromoleculeName: Short transient receptor potential channel 5 / type: protein_or_peptide / ID: 1
Details: residues 766,767(SR) restriction enzyme, XbaI, residues 768-773(LEVLFQ) protease cleavage site, HRV-3C
Number of copies: 4 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 89.951891 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MAQLYYKKVN YSPYRDRIPL QIVRAETELS AEEKAFLNAV EKGDYATVKQ ALQEAEIYYN VNINCMDPLG RSALLIAIEN ENLEIMELL LNHSVYVGDA LLYAIRKEVV GAVELLLSYR RPSGEKQVPT LMMDTQFSEF TPDITPIMLA AHTNNYEIIK L LVQKRVTI ...String:
MAQLYYKKVN YSPYRDRIPL QIVRAETELS AEEKAFLNAV EKGDYATVKQ ALQEAEIYYN VNINCMDPLG RSALLIAIEN ENLEIMELL LNHSVYVGDA LLYAIRKEVV GAVELLLSYR RPSGEKQVPT LMMDTQFSEF TPDITPIMLA AHTNNYEIIK L LVQKRVTI PRPHQIRCNC VECVSSSEVD SLRHSRSRLN IYKALASPSL IALSSEDPIL TAFRLGWELK ELSKVENEFK AE YEELSQQ CKLFAKDLLD QARSSRELEI ILNHRDDHSE ELDPQKYHDL AKLKVAIKYH QKEFVAQPNC QQLLATLWYD GFP GWRRKH WVVKLLTCMT IGFLFPMLSI AYLISPRSNL GLFIKKPFIK FICHTASYLT FLFMLLLASQ HIVRTDLHVQ GPPP TVVEW MILPWVLGFI WGEIKEMWDG GFTEYIHDWW NLMDFAMNSL YLATISLKIV AYVKYNGSRP REEWEMWHPT LIAEA LFAI SNILSSLRLI SLFTANSHLG PLQISLGRML LDILKFLFIY CLVLLAFANG LNQLYFYYET RAIDEPNNCK GIRCEK QNN AFSTLFETLQ SLFWSVFGLL NLYVTNVKAR HEFTEFVGAT MFGTYNVISL VVLLNMLIAM MNNSYQLIAD HADIEWK FA RTKLWMSYFD EGGTLPPPFN IIPSPKSFLY LGNWFNNTFC PKRDPDGRRR RRNLRSFTER NADSLIQNQH YQEVIRNL V KRYVAAMIRN SKTHEGLTEE NFKELKQDIS SFRYEVLDLL GNRKSRLEVL FQ

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Macromolecule #2: Guanine nucleotide-binding protein G(i) subunit alpha-3

MacromoleculeName: Guanine nucleotide-binding protein G(i) subunit alpha-3
type: protein_or_peptide / ID: 2 / Number of copies: 4 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 41.399047 KDa
Recombinant expressionOrganism: Escherichia coli K-12 (bacteria)
SequenceString: MGCTLSAEDK AAVERSKMID RNLREDGEKA AKEVKLLLLG AGESGKSTIV KQMKIIHEDG YSEDECKQYK VVVYSNTIQS IIAIIRAMG RLKIDFGEAA RADDARQLFV LAGSAEEGVM HHHHHHTPEL AGVIKRLWRD GGVQACFSRS REYQLNDSAS Y YLNDLDRI ...String:
MGCTLSAEDK AAVERSKMID RNLREDGEKA AKEVKLLLLG AGESGKSTIV KQMKIIHEDG YSEDECKQYK VVVYSNTIQS IIAIIRAMG RLKIDFGEAA RADDARQLFV LAGSAEEGVM HHHHHHTPEL AGVIKRLWRD GGVQACFSRS REYQLNDSAS Y YLNDLDRI SQSNYIPTQQ DVLRTRVKTT GIVETHFTFK DLYFKMFDVG GLRSERKKWI HCFEGVTAII FCVALSDYDL VL AEDEEMN RMHESMKLFD SICNNKWFTE TSIILFLNKK DLFEEKIKRS PLTICYPEYT GSNTYEEAAA YIQCQFEDLN RRK DTKEIY THFTCATDTK NVQFVFDAVT DVIIKNNLKE CGLY

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Macromolecule #3: PHOSPHATIDYLETHANOLAMINE

MacromoleculeName: PHOSPHATIDYLETHANOLAMINE / type: ligand / ID: 3 / Number of copies: 4 / Formula: PTY
Molecular weightTheoretical: 734.039 Da
Chemical component information

ChemComp-PTY:
PHOSPHATIDYLETHANOLAMINE / phospholipid*YM

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Macromolecule #4: CHOLESTEROL HEMISUCCINATE

MacromoleculeName: CHOLESTEROL HEMISUCCINATE / type: ligand / ID: 4 / Number of copies: 4 / Formula: Y01
Molecular weightTheoretical: 486.726 Da
Chemical component information

ChemComp-Y01:
CHOLESTEROL HEMISUCCINATE

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Macromolecule #5: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 5 / Number of copies: 4 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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Macromolecule #6: CALCIUM ION

MacromoleculeName: CALCIUM ION / type: ligand / ID: 6 / Number of copies: 4 / Formula: CA
Molecular weightTheoretical: 40.078 Da

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Macromolecule #7: (2S)-2-(hexadecanoyloxy)-3-hydroxypropyl (9Z)-octadec-9-enoate

MacromoleculeName: (2S)-2-(hexadecanoyloxy)-3-hydroxypropyl (9Z)-octadec-9-enoate
type: ligand / ID: 7 / Number of copies: 4 / Formula: YZY
Molecular weightTheoretical: 594.949 Da
Chemical component information

ChemComp-YZY:
(2S)-2-(hexadecanoyloxy)-3-hydroxypropyl (9Z)-octadec-9-enoate

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Macromolecule #8: GUANOSINE-5'-TRIPHOSPHATE

MacromoleculeName: GUANOSINE-5'-TRIPHOSPHATE / type: ligand / ID: 8 / Number of copies: 4 / Formula: GTP
Molecular weightTheoretical: 523.18 Da
Chemical component information

ChemComp-GTP:
GUANOSINE-5'-TRIPHOSPHATE / GTP, energy-carrying molecule*YM

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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: 8
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS GLACIOS
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 40.0 e/Å2
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.0 µm

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Image processing

Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

7e4t

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.93 Å / Resolution method: OTHER
Details: We combined two different maps from the same dataset (D_1300028166_em-additional-volume_P1.map.V2 and D_1300028166_em-additional-volume_P2.map.V2) to generate a composite map (D_1300028166_ ...Details: We combined two different maps from the same dataset (D_1300028166_em-additional-volume_P1.map.V2 and D_1300028166_em-additional-volume_P2.map.V2) to generate a composite map (D_1300028166_em-volume_P1.map.V2). The density of the G protein area could not be visualized clearly in the consensus map of this EM dataset. Therefore, we performed focused classification and local refinement to improve the density of the G protein area using symmetry expanded particles with C4 symmetry imposition, which required more number of particles. Finally, the number of particles used to reconstruct additional volume data 2 (D_1300028166_em-additional-volume_P2.map.V2) is 18,935 and the number of particles used to reconstruct additional volume data 1 (D_1300028166_em-additional-volume_P1.map.V2) is 205,343. Furthermore, the resolution stated above is based on map resolution estimates calculated by a validation tool in Phenix, FSC (model) = 0.5.
Number images used: 18935
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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