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- EMDB-33937: Structure of recombinant RyR2 (EGTA dataset, class 2, closed state) -

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Basic information

Entry
Database: EMDB / ID: EMD-33937
TitleStructure of recombinant RyR2 (EGTA dataset, class 2, closed state)
Map dataStructure of recombinant RyR2 (EGTA dataset, class 2, closed state)
Sample
  • Complex: Recombinant RyR2 in the presence of EGTA
    • Complex: Ryanodine receptor 2
    • Complex: FKBP1B
Function / homology
Function and homology information


establishment of protein localization to endoplasmic reticulum / manganese ion transmembrane transport / : / type B pancreatic cell apoptotic process / Purkinje myocyte to ventricular cardiac muscle cell signaling / regulation of atrial cardiac muscle cell action potential / left ventricular cardiac muscle tissue morphogenesis / suramin binding / regulation of AV node cell action potential / sarcoplasmic reticulum calcium ion transport ...establishment of protein localization to endoplasmic reticulum / manganese ion transmembrane transport / : / type B pancreatic cell apoptotic process / Purkinje myocyte to ventricular cardiac muscle cell signaling / regulation of atrial cardiac muscle cell action potential / left ventricular cardiac muscle tissue morphogenesis / suramin binding / regulation of AV node cell action potential / sarcoplasmic reticulum calcium ion transport / regulation of SA node cell action potential / calcium-induced calcium release activity / calcium ion transport into cytosol / A band / embryonic heart tube morphogenesis / Stimuli-sensing channels / ventricular cardiac muscle cell action potential / negative regulation of calcium-mediated signaling / cardiac muscle hypertrophy / Ion homeostasis / regulation of ventricular cardiac muscle cell action potential / ryanodine-sensitive calcium-release channel activity / negative regulation of release of sequestered calcium ion into cytosol / response to redox state / release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / negative regulation of heart rate / response to caffeine / regulation of cardiac muscle contraction by calcium ion signaling / extrinsic component of cytoplasmic side of plasma membrane / response to muscle activity / cellular response to caffeine / 'de novo' protein folding / FK506 binding / calcium ion transmembrane import into cytosol / protein kinase A regulatory subunit binding / protein kinase A catalytic subunit binding / negative regulation of cytosolic calcium ion concentration / positive regulation of the force of heart contraction / smooth endoplasmic reticulum / response to muscle stretch / intracellularly gated calcium channel activity / regulation of ryanodine-sensitive calcium-release channel activity / response to magnesium ion / detection of calcium ion / regulation of cardiac muscle contraction / regulation of cytosolic calcium ion concentration / positive regulation of heart rate / cardiac muscle contraction / calcium channel inhibitor activity / release of sequestered calcium ion into cytosol / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / Ion homeostasis / regulation of heart rate / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / cellular response to epinephrine stimulus / calcium channel complex / sarcoplasmic reticulum membrane / calcium-mediated signaling / peptidylprolyl isomerase / sarcomere / sarcoplasmic reticulum / striated muscle contraction / peptidyl-prolyl cis-trans isomerase activity / calcium channel regulator activity / protein maturation / response to calcium ion / protein refolding / sarcolemma / intracellular calcium ion homeostasis / Stimuli-sensing channels / Z disc / calcium ion transmembrane transport / calcium channel activity / calcium ion transport / nuclear envelope / protein folding / scaffold protein binding / monoatomic ion transmembrane transport / response to hypoxia / transmembrane transporter binding / calmodulin binding / signaling receptor binding / calcium ion binding / protein kinase binding / enzyme binding / protein-containing complex / membrane / identical protein binding / cytoplasm
Similarity search - Function
Ryanodine receptor, SPRY domain 2 / : / Ryanodine receptor junctional solenoid repeat / Ryanodine Receptor TM 4-6 / Ryanodine receptor / Ryanodine receptor, SPRY domain 1 / Ryanodine receptor, SPRY domain 3 / Ryanodine Receptor TM 4-6 / Ryanodine receptor Ryr / RyR domain ...Ryanodine receptor, SPRY domain 2 / : / Ryanodine receptor junctional solenoid repeat / Ryanodine Receptor TM 4-6 / Ryanodine receptor / Ryanodine receptor, SPRY domain 1 / Ryanodine receptor, SPRY domain 3 / Ryanodine Receptor TM 4-6 / Ryanodine receptor Ryr / RyR domain / : / RyR/IP3 receptor binding core, RIH domain superfamily / RyR/IP3R Homology associated domain / Inositol 1,4,5-trisphosphate/ryanodine receptor / RIH domain / RyR and IP3R Homology associated / Inositol 1,4,5-trisphosphate/ryanodine receptor / RIH domain / : / MIR motif / MIR domain / MIR domain profile. / Domain in ryanodine and inositol trisphosphate receptors and protein O-mannosyltransferases / Mir domain superfamily / FKBP-type peptidyl-prolyl cis-trans isomerase / FKBP-type peptidyl-prolyl cis-trans isomerase domain / FKBP-type peptidyl-prolyl cis-trans isomerase domain profile. / SPRY domain / B30.2/SPRY domain / B30.2/SPRY domain profile. / B30.2/SPRY domain superfamily / Domain in SPla and the RYanodine Receptor. / SPRY domain / Peptidyl-prolyl cis-trans isomerase domain superfamily / EF-hand domain pair / EF-hand domain / Ion transport domain / Ion transport protein / EF-hand domain pair / Concanavalin A-like lectin/glucanase domain superfamily
Similarity search - Domain/homology
Ryanodine receptor 2 / Peptidyl-prolyl cis-trans isomerase FKBP1B
Similarity search - Component
Biological speciesMus musculus (house mouse) / Homo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.52 Å
AuthorsKobayashi T / Tsutsumi A / Kurebayashi N / Kodama M / Kikkawa M / Murayama T / Ogawa H
Funding support Japan, 6 items
OrganizationGrant numberCountry
Japan Society for the Promotion of Science (JSPS)JP16H04748 Japan
Japan Society for the Promotion of Science (JSPS)JP19K07105 Japan
Japan Society for the Promotion of Science (JSPS)19H03404 Japan
Japan Society for the Promotion of Science (JSPS)JP21H02411 Japan
Japan Agency for Medical Research and Development (AMED)JP21am0101080 Japan
Japan Agency for Medical Research and Development (AMED)19ek0109202 Japan
CitationJournal: Nat Commun / Year: 2022
Title: Molecular basis for gating of cardiac ryanodine receptor explains the mechanisms for gain- and loss-of function mutations.
Authors: Takuya Kobayashi / Akihisa Tsutsumi / Nagomi Kurebayashi / Kei Saito / Masami Kodama / Takashi Sakurai / Masahide Kikkawa / Takashi Murayama / Haruo Ogawa /
Abstract: Cardiac ryanodine receptor (RyR2) is a large Ca release channel in the sarcoplasmic reticulum and indispensable for excitation-contraction coupling in the heart. RyR2 is activated by Ca and RyR2 ...Cardiac ryanodine receptor (RyR2) is a large Ca release channel in the sarcoplasmic reticulum and indispensable for excitation-contraction coupling in the heart. RyR2 is activated by Ca and RyR2 mutations are implicated in severe arrhythmogenic diseases. Yet, the structural basis underlying channel opening and how mutations affect the channel remains unknown. Here, we address the gating mechanism of RyR2 by combining high-resolution structures determined by cryo-electron microscopy with quantitative functional analysis of channels carrying various mutations in specific residues. We demonstrated two fundamental mechanisms for channel gating: interactions close to the channel pore stabilize the channel to prevent hyperactivity and a series of interactions in the surrounding regions is necessary for channel opening upon Ca binding. Mutations at the residues involved in the former and the latter mechanisms cause gain-of-function and loss-of-function, respectively. Our results reveal gating mechanisms of the RyR2 channel and alterations by pathogenic mutations at the atomic level.
History
DepositionJul 29, 2022-
Header (metadata) releaseAug 10, 2022-
Map releaseAug 10, 2022-
UpdateAug 10, 2022-
Current statusAug 10, 2022Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_33937.png

Downloads & links

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Map

FileDownload / File: emd_33937.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationStructure of recombinant RyR2 (EGTA dataset, class 2, closed state)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.28 Å/pix.
x 400 pix.
= 513.6 Å		1.28 Å/pix.
x 400 pix.
= 513.6 Å		1.28 Å/pix.
x 400 pix.
= 513.6 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.284 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.02
Minimum - Maximum-0.07614584 - 0.11966705
Average (Standard dev.)-7.481469e-05 (±0.003966031)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions400400400
Spacing400400400
CellA=B=C: 513.60004 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: Structure of recombinant RyR2 (EGTA dataset, class 2, closed state)

Fileemd_33937_half_map_1.map
AnnotationStructure of recombinant RyR2 (EGTA dataset, class 2, closed state)
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Structure of recombinant RyR2 (EGTA dataset, class 2, closed state)

Fileemd_33937_half_map_2.map
AnnotationStructure of recombinant RyR2 (EGTA dataset, class 2, closed state)
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Recombinant RyR2 in the presence of EGTA

EntireName: Recombinant RyR2 in the presence of EGTA
Components
  • Complex: Recombinant RyR2 in the presence of EGTA
    • Complex: Ryanodine receptor 2
    • Complex: FKBP1B

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Supramolecule #1: Recombinant RyR2 in the presence of EGTA

SupramoleculeName: Recombinant RyR2 in the presence of EGTA / type: complex / Chimera: Yes / ID: 1 / Parent: 0 / Macromolecule list: #1-#2 / Details: in complex with FKBP12.6
Source (natural)Organism: Mus musculus (house mouse)
Recombinant expressionOrganism: Homo sapiens (human)

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Supramolecule #2: Ryanodine receptor 2

SupramoleculeName: Ryanodine receptor 2 / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)
Recombinant expressionOrganism: Escherichia coli (E. coli)

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Supramolecule #3: FKBP1B

SupramoleculeName: FKBP1B / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2

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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: 7.4
Sugar embeddingMaterial: buffer
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.5 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

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

5tal

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.52 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 41197
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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