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- PDB-7tdg: Rabbit RyR1 with AMP-PCP and high Ca2+ embedded in nanodisc in in... -
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Open data
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Basic information
Entry | Database: PDB / ID: 7tdg | ||||||||||||||||||
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Title | Rabbit RyR1 with AMP-PCP and high Ca2+ embedded in nanodisc in inactivated conformation (Dataset-A) | ||||||||||||||||||
![]() | Ryanodine receptor 1,RyR1 | ||||||||||||||||||
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Function / homology | ![]() ATP-gated ion channel activity / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | ||||||||||||||||||
Biological species | ![]() ![]() ![]() | ||||||||||||||||||
Method | ![]() ![]() ![]() | ||||||||||||||||||
![]() | Nayak, A.R. / Samso, M. | ||||||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Ca inactivation of the mammalian ryanodine receptor type 1 in a lipidic environment revealed by cryo-EM. Authors: Ashok R Nayak / Montserrat Samsó / ![]() Abstract: Activation of the intracellular Ca channel ryanodine receptor (RyR) triggers a cytosolic Ca surge, while elevated cytosolic Ca inhibits the channel in a negative feedback mechanism. Cryogenic ...Activation of the intracellular Ca channel ryanodine receptor (RyR) triggers a cytosolic Ca surge, while elevated cytosolic Ca inhibits the channel in a negative feedback mechanism. Cryogenic electron microscopy of rabbit RyR1 embedded in nanodiscs under partially inactivating Ca conditions revealed an open and a closed-inactivated conformation. Ca binding to the high-affinity site engages the central and C-terminal domains into a block, which pries the S6 four-helix bundle open. Further rotation of this block pushes S6 toward the central axis, closing (inactivating) the channel. Main characteristics of the Ca-inactivated conformation are downward conformation of the cytoplasmic assembly and tightly knit subunit interface contributed by a fully occupied Ca activation site, two inter-subunit resolved lipids, and two salt bridges between the EF hand domain and the S2-S3 loop validated by disease-causing mutations. The structural insight illustrates the prior Ca activation prerequisite for Ca inactivation and provides for a seamless transition from inactivated to closed conformations. | ||||||||||||||||||
History |
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 2.5 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 25828MC ![]() 7k0tC ![]() 7tdhC ![]() 7tdiC ![]() 7tdjC ![]() 7tdkC C: citing same article ( M: map data used to model this data |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 533663.250 Da / Num. of mol.: 4 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() ![]() #2: Chemical | ChemComp-ZN / #3: Chemical | ChemComp-CA / #4: Chemical | ChemComp-ACP / #5: Chemical | ChemComp-POV / ( ![]() Has ligand of interest | Y | |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: ![]() |
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Sample preparation
Component | Name: Rabbit RyR1 with AMP-PCP and high Ca2+ in nanodisc / Type: COMPLEX Details: Purified RyR1 was reconstituted with membrane scaffold protein MSP1E3D1 and POPC. Entity ID: #1 / Source: NATURAL | ||||||||||||||||||||||||||||||
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Molecular weight | Value: 2.26 MDa / Experimental value: YES | ||||||||||||||||||||||||||||||
Source (natural) | Organism: ![]() ![]() ![]() ![]() | ||||||||||||||||||||||||||||||
Buffer solution | pH: 7.4 | ||||||||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 4.35 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied![]() ![]() Details: Purified RyR1 was reconstituted with membrane scaffold protein MSP1E3D1 and POPC at a 1:2:50 molar ratio. | ||||||||||||||||||||||||||||||
Specimen support | Grid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: UltrAuFoil R1.2/1.3 | ||||||||||||||||||||||||||||||
Vitrification![]() | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 95 % / Chamber temperature: 277 K Details: Sample was blotted for 1 second on both sides with Whatman hardened ashless filter paper with blot force 2. |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source![]() ![]() |
Electron lens | Mode: BRIGHT FIELD![]() ![]() |
Specimen holder | Cryogen: NITROGEN |
Image recording | Electron dose: 70 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K3 (6k x 4k) / Num. of grids imaged: 2 / Num. of real images: 10002 |
EM imaging optics | Energyfilter slit width: 20 eV |
Image scans | Movie frames/image: 60 |
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Processing
EM software |
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CTF correction![]() | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 311258 | ||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry![]() ![]() | ||||||||||||||||||||||||||||||||||||
3D reconstruction![]() | Resolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 90530 Details: A 3D class consisting of 90530 particles resulted in a 3.8 Angstroms map. Num. of class averages: 2 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||
Atomic model building | Protocol: FLEXIBLE FIT / Space: REAL |