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- PDB-6oy9: Structure of the Rhodopsin-Transducin Complex -

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Basic information

Entry
Database: PDB / ID: 6oy9
TitleStructure of the Rhodopsin-Transducin Complex
Components
  • Gt-alpha/Gi1-alpha chimera
  • Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
  • Guanine nucleotide-binding protein G(T) subunit gamma-T1
  • Rhodopsin
KeywordsSIGNALING PROTEIN / GPCR / G protein / Complex
Function / homology
Function and homology information


negative regulation of cyclic-nucleotide phosphodiesterase activity / Opsins / VxPx cargo-targeting to cilium / sperm head plasma membrane / rod bipolar cell differentiation / absorption of visible light / opsin binding / The canonical retinoid cycle in rods (twilight vision) / Olfactory Signaling Pathway / G protein-coupled opsin signaling pathway ...negative regulation of cyclic-nucleotide phosphodiesterase activity / Opsins / VxPx cargo-targeting to cilium / sperm head plasma membrane / rod bipolar cell differentiation / absorption of visible light / opsin binding / The canonical retinoid cycle in rods (twilight vision) / Olfactory Signaling Pathway / G protein-coupled opsin signaling pathway / photoreceptor inner segment membrane / Sensory perception of sweet, bitter, and umami (glutamate) taste / podosome assembly / G protein-coupled photoreceptor activity / 11-cis retinal binding / Synthesis, secretion, and inactivation of Glucagon-like Peptide-1 (GLP-1) / rod photoreceptor outer segment / cellular response to light stimulus / eye photoreceptor cell development / detection of light stimulus involved in visual perception / G protein-coupled receptor complex / Inactivation, recovery and regulation of the phototransduction cascade / thermotaxis / Activation of the phototransduction cascade / outer membrane / detection of temperature stimulus involved in thermoception / response to light intensity / photoreceptor cell maintenance / arrestin family protein binding / Activation of G protein gated Potassium channels / G-protein activation / G beta:gamma signalling through PI3Kgamma / Prostacyclin signalling through prostacyclin receptor / G beta:gamma signalling through PLC beta / ADP signalling through P2Y purinoceptor 1 / Thromboxane signalling through TP receptor / Presynaptic function of Kainate receptors / G beta:gamma signalling through CDC42 / Inhibition of voltage gated Ca2+ channels via Gbeta/gamma subunits / G alpha (12/13) signalling events / Glucagon-type ligand receptors / G beta:gamma signalling through BTK / ADP signalling through P2Y purinoceptor 12 / Adrenaline,noradrenaline inhibits insulin secretion / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / Ca2+ pathway / Thrombin signalling through proteinase activated receptors (PARs) / G alpha (z) signalling events / Extra-nuclear estrogen signaling / G alpha (s) signalling events / photoreceptor outer segment membrane / G alpha (q) signalling events / G alpha (i) signalling events / Glucagon-like Peptide-1 (GLP1) regulates insulin secretion / High laminar flow shear stress activates signaling by PIEZO1 and PECAM1:CDH5:KDR in endothelial cells / Vasopressin regulates renal water homeostasis via Aquaporins / acyl binding / response to light stimulus / phototransduction, visible light / G-protein alpha-subunit binding / phototransduction / photoreceptor outer segment / sperm midpiece / photoreceptor inner segment / visual perception / guanyl-nucleotide exchange factor activity / G protein-coupled receptor binding / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / G-protein beta/gamma-subunit complex binding / microtubule cytoskeleton organization / photoreceptor disc membrane / GDP binding / cellular response to catecholamine stimulus / adenylate cyclase-activating dopamine receptor signaling pathway / intracellular protein localization / cellular response to prostaglandin E stimulus / G-protein beta-subunit binding / heterotrimeric G-protein complex / cell-cell junction / sensory perception of taste / signaling receptor complex adaptor activity / retina development in camera-type eye / GTPase binding / phospholipase C-activating G protein-coupled receptor signaling pathway / gene expression / cell population proliferation / G protein-coupled receptor signaling pathway / Golgi membrane / GTPase activity / synapse / protein-containing complex binding / protein kinase binding / GTP binding / zinc ion binding / metal ion binding / identical protein binding / membrane / plasma membrane / cytoplasm
Similarity search - Function
Transducin (heterotrimeric G protein), gamma chain / G Protein Gi Gamma 2 / Rhodopsin, N-terminal / Amino terminal of the G-protein receptor rhodopsin / Rhodopsin / Opsin / Visual pigments (opsins) retinal binding site / Visual pigments (opsins) retinal binding site. / : / Rhopdopsin 7-helix transmembrane proteins ...Transducin (heterotrimeric G protein), gamma chain / G Protein Gi Gamma 2 / Rhodopsin, N-terminal / Amino terminal of the G-protein receptor rhodopsin / Rhodopsin / Opsin / Visual pigments (opsins) retinal binding site / Visual pigments (opsins) retinal binding site. / : / Rhopdopsin 7-helix transmembrane proteins / Rhodopsin 7-helix transmembrane proteins / G-protein alpha subunit, group I / YVTN repeat-like/Quinoprotein amine dehydrogenase / Serpentine type 7TM GPCR chemoreceptor Srsx / 7 Propeller / Methylamine Dehydrogenase; Chain H / 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 / Few Secondary Structures / Irregular / G-protein, gamma subunit / G-protein gamma subunit domain profile. / G-protein gamma-like domain / G-protein gamma-like domain superfamily / GGL domain / G protein gamma subunit-like motifs / GGL domain / G protein beta WD-40 repeat protein / Guanine nucleotide-binding protein, beta subunit / G-protein, beta subunit / G-protein coupled receptors family 1 signature. / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 7 transmembrane receptor (rhodopsin family) / WD domain, G-beta repeat / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / Up-down Bundle / P-loop containing nucleoside triphosphate hydrolase / Mainly Beta / Mainly Alpha
Similarity search - Domain/homology
RETINAL / Guanine nucleotide-binding protein G(T) subunit gamma-T1 / Rhodopsin / Guanine nucleotide-binding protein G(t) subunit alpha-1 / Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
Similarity search - Component
Biological speciesBos taurus (domestic cattle)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.9 Å
AuthorsGao, Y. / Hu, H. / Ramachandran, S. / Erickson, J.W. / Cerione, R.A. / Skiniotis, G.
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Cancer Institute (NIH/NCI)R01 CA201402 United States
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)R01 NS092695 United States
CitationJournal: Mol Cell / Year: 2019
Title: Structures of the Rhodopsin-Transducin Complex: Insights into G-Protein Activation.
Authors: Yang Gao / Hongli Hu / Sekar Ramachandran / Jon W Erickson / Richard A Cerione / Georgios Skiniotis /
Abstract: Rhodopsin (Rho), a prototypical G-protein-coupled receptor (GPCR) in vertebrate vision, activates the G-protein transducin (G) by catalyzing GDP-GTP exchange on its α subunit (Gα). To elucidate the ...Rhodopsin (Rho), a prototypical G-protein-coupled receptor (GPCR) in vertebrate vision, activates the G-protein transducin (G) by catalyzing GDP-GTP exchange on its α subunit (Gα). To elucidate the determinants of G coupling and activation, we obtained cryo-EM structures of a fully functional, light-activated Rho-G complex in the presence and absence of a G-protein-stabilizing nanobody. The structures illustrate how G overcomes its low basal activity by engaging activated Rho in a conformation distinct from other GPCR-G-protein complexes. Moreover, the nanobody-free structures reveal native conformations of G-protein components and capture three distinct conformers showing the Gα helical domain (αHD) contacting the Gβγ subunits. These findings uncover the molecular underpinnings of G-protein activation by visual rhodopsin and shed new light on the role played by Gβγ during receptor-catalyzed nucleotide exchange.
History
DepositionMay 14, 2019Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 24, 2019Provider: repository / Type: Initial release
Revision 1.1Sep 4, 2019Group: Data collection / Database references / Category: citation / Item: _citation.journal_volume / _citation.page_first
Revision 1.2Nov 27, 2019Group: Data collection / Category: em_software / Item: _em_software.name
Revision 1.3Dec 4, 2019Group: Author supporting evidence / Category: pdbx_audit_support / Item: _pdbx_audit_support.funding_organization
Revision 1.4Nov 13, 2024Group: Data collection / Database references / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_admin.last_update

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Structure visualization

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Assembly

Deposited unit
A: Gt-alpha/Gi1-alpha chimera
B: Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1
G: Guanine nucleotide-binding protein G(T) subunit gamma-T1
R: Rhodopsin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)127,2745
Polymers126,9894
Non-polymers2841
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area9980 Å2
ΔGint-62 kcal/mol
Surface area46010 Å2

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Components

#1: Protein Gt-alpha/Gi1-alpha chimera


Mass: 41188.895 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bos taurus (domestic cattle) / Production host: Escherichia coli (E. coli) / References: UniProt: P04695
#2: Protein Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1 / Transducin beta chain 1


Mass: 37430.957 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Bos taurus (domestic cattle) / References: UniProt: P62871
#3: Protein Guanine nucleotide-binding protein G(T) subunit gamma-T1 / Transducin gamma chain


Mass: 9337.784 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Bos taurus (domestic cattle) / References: UniProt: P02698
#4: Protein Rhodopsin


Mass: 39031.457 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Bos taurus (domestic cattle) / References: UniProt: P02699
#5: Chemical ChemComp-RET / RETINAL


Mass: 284.436 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C20H28O / Feature type: SUBJECT OF INVESTIGATION
Has protein modificationY

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Experimental details

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Experiment

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

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Sample preparation

Component
IDNameTypeEntity IDParent-IDSource
1Rhodopsin-Transducin ComplexCOMPLEX#1-#40MULTIPLE SOURCES
2TransducinCOMPLEX#1-#31RECOMBINANT
3RhodopsinCOMPLEX#41NATURAL
Molecular weightValue: 0.1418 MDa / Experimental value: NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Bos taurus (domestic cattle)9913
23Bos taurus (domestic cattle)9913
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 200 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK III / Cryogen name: ETHANE / Humidity: 100 %

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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 FIELD / Cs: 2.7 mm / C2 aperture diameter: 50 µm
Image recordingAverage exposure time: 8 sec. / Electron dose: 50 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of real images: 12616
Image scansMovie frames/image: 40

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Processing

EM software
IDNameVersionCategory
1RELIONparticle selection
2SerialEMimage acquisition
4Gctf1.06CTF correction
12RELIONclassification
13cisTEM3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 5872324
3D reconstructionResolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 250451 / Symmetry type: POINT
Atomic model buildingProtocol: BACKBONE TRACE

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