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- PDB-6jh6: Structure of RyR2 (F/A/Ca2+ dataset) -

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Basic information

Entry
Database: PDB / ID: 6jh6
TitleStructure of RyR2 (F/A/Ca2+ dataset)
Components
  • Peptidyl-prolyl cis-trans isomerase FKBP1B
  • RyR2
KeywordsMEMBRANE PROTEIN / cryo-EM
Function / homology
Function and homology information


positive regulation of sequestering of calcium ion / cyclic nucleotide binding / negative regulation of calcium-mediated signaling / negative regulation of insulin secretion involved in cellular response to glucose stimulus / negative regulation of release of sequestered calcium ion into cytosol / neuronal action potential propagation / insulin secretion involved in cellular response to glucose stimulus / response to redox state / 'de novo' protein folding / negative regulation of heart rate ...positive regulation of sequestering of calcium ion / cyclic nucleotide binding / negative regulation of calcium-mediated signaling / negative regulation of insulin secretion involved in cellular response to glucose stimulus / negative regulation of release of sequestered calcium ion into cytosol / neuronal action potential propagation / insulin secretion involved in cellular response to glucose stimulus / response to redox state / 'de novo' protein folding / negative regulation of heart rate / FK506 binding / positive regulation of axon regeneration / smooth muscle contraction / response to vitamin E / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / calcium channel inhibitor activity / T cell proliferation / Ion homeostasis / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / release of sequestered calcium ion into cytosol / sarcoplasmic reticulum membrane / calcium channel regulator activity / calcium channel complex / protein maturation / peptidyl-prolyl cis-trans isomerase activity / RNA polymerase II CTD heptapeptide repeat P3 isomerase activity / RNA polymerase II CTD heptapeptide repeat P6 isomerase activity / peptidylprolyl isomerase / calcium-mediated signaling / response to hydrogen peroxide / Stimuli-sensing channels / Z disc / positive regulation of cytosolic calcium ion concentration / protein refolding / transmembrane transporter binding / signaling receptor binding / membrane / cytoplasm
Similarity search - Function
: / FKBP-type peptidyl-prolyl cis-trans isomerase domain profile. / FKBP-type peptidyl-prolyl cis-trans isomerase / FKBP-type peptidyl-prolyl cis-trans isomerase domain / Peptidyl-prolyl cis-trans isomerase domain superfamily
Similarity search - Domain/homology
ADENOSINE-5'-TRIPHOSPHATE / Peptidyl-prolyl cis-trans isomerase FKBP1B
Similarity search - Component
Biological speciesHomo sapiens (human)
Sus scrofa (pig)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.8 Å
AuthorsChi, X.M. / Gong, D.S. / Ren, K. / Zhou, G.W. / Huang, G.X.Y. / Lei, J.L. / Zhou, Q. / Yan, N.
CitationJournal: Proc Natl Acad Sci U S A / Year: 2019
Title: Molecular basis for allosteric regulation of the type 2 ryanodine receptor channel gating by key modulators.
Authors: Ximin Chi / Deshun Gong / Kang Ren / Gewei Zhou / Gaoxingyu Huang / Jianlin Lei / Qiang Zhou / Nieng Yan /
Abstract: The type 2 ryanodine receptor (RyR2) is responsible for releasing Ca from the sarcoplasmic reticulum of cardiomyocytes, subsequently leading to muscle contraction. Here, we report 4 cryo-electron ...The type 2 ryanodine receptor (RyR2) is responsible for releasing Ca from the sarcoplasmic reticulum of cardiomyocytes, subsequently leading to muscle contraction. Here, we report 4 cryo-electron microscopy (cryo-EM) structures of porcine RyR2 bound to distinct modulators that, together with our published structures, provide mechanistic insight into RyR2 regulation. Ca alone induces a contraction of the central domain that facilitates the dilation of the S6 bundle but is insufficient to open the pore. The small-molecule agonist PCB95 helps Ca to overcome the barrier for opening. FKBP12.6 induces a relaxation of the central domain that decouples it from the S6 bundle, stabilizing RyR2 in a closed state even in the presence of Ca and PCB95. Although the channel is open when PCB95 is replaced by caffeine and adenosine 5'-triphosphate (ATP), neither of the modulators alone can sufficiently counter the antagonistic effect to open the channel. Our study marks an important step toward mechanistic understanding of the sophisticated regulation of this key channel whose aberrant activity engenders life-threatening cardiac disorders.
History
DepositionFeb 17, 2019Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Dec 11, 2019Provider: repository / Type: Initial release
Revision 1.1Jan 1, 2020Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.2Mar 27, 2024Group: Data collection / Database references / Category: chem_comp_atom / chem_comp_bond / database_2
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

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Assembly

Deposited unit
A: Peptidyl-prolyl cis-trans isomerase FKBP1B
B: RyR2
C: Peptidyl-prolyl cis-trans isomerase FKBP1B
D: RyR2
E: Peptidyl-prolyl cis-trans isomerase FKBP1B
F: RyR2
G: Peptidyl-prolyl cis-trans isomerase FKBP1B
H: RyR2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)2,309,10716
Polymers2,306,8178
Non-polymers2,2908
Water00
1


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

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Components

#1: Protein
Peptidyl-prolyl cis-trans isomerase FKBP1B / PPIase FKBP1B / 12.6 kDa FK506-binding protein / FKBP-12.6 / FK506-binding protein 1B / FKBP-1B / ...PPIase FKBP1B / 12.6 kDa FK506-binding protein / FKBP-12.6 / FK506-binding protein 1B / FKBP-1B / Immunophilin FKBP12.6 / Rotamase / h-FKBP-12


Mass: 11798.501 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: FKBP1B, FKBP12.6, FKBP1L, FKBP9, OTK4 / Production host: Escherichia coli (E. coli) / References: UniProt: P68106, peptidylprolyl isomerase
#2: Protein
RyR2


Mass: 564905.625 Da / Num. of mol.: 4 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig)
#3: Chemical
ChemComp-ATP / ADENOSINE-5'-TRIPHOSPHATE


Mass: 507.181 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C10H16N5O13P3 / Comment: ATP, energy-carrying molecule*YM
#4: Chemical
ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Zn

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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

ComponentName: RyR2 in complex with FKBP12.6 / Type: COMPLEX / Entity ID: #1-#2 / Source: NATURAL
Source (natural)Organism: Sus scrofa (pig)
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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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
Image recordingElectron dose: 48.6 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

EM software
IDNameVersionCategory
4GctfCTF correction
11RELION2final Euler assignment
13RELION23D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C4 (4 fold cyclic)
3D reconstructionResolution: 4.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 44288 / Symmetry type: POINT

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