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- PDB-5w0s: GroEL using cryoEM -

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Basic information

Entry
Database: PDB / ID: 5w0s
TitleGroEL using cryoEM
Components60 kDa chaperonin
KeywordsCHAPERONE / GroEL / cryoEM / conformational heterogeneity.
Function / homology
Function and homology information


GroEL-GroES complex / chaperonin ATPase / virion assembly / chaperone cofactor-dependent protein refolding / isomerase activity / ATP-dependent protein folding chaperone / response to radiation / unfolded protein binding / protein folding / response to heat ...GroEL-GroES complex / chaperonin ATPase / virion assembly / chaperone cofactor-dependent protein refolding / isomerase activity / ATP-dependent protein folding chaperone / response to radiation / unfolded protein binding / protein folding / response to heat / protein refolding / magnesium ion binding / ATP hydrolysis activity / ATP binding / membrane / identical protein binding / cytosol / cytoplasm
Similarity search - Function
GROEL; domain 2 / TCP-1-like chaperonin intermediate domain / GROEL; domain 1 / GroEL-like equatorial domain / Chaperonin Cpn60, conserved site / Chaperonins cpn60 signature. / Chaperonin Cpn60/GroEL / GroEL-like equatorial domain superfamily / TCP-1-like chaperonin intermediate domain superfamily / GroEL-like apical domain superfamily ...GROEL; domain 2 / TCP-1-like chaperonin intermediate domain / GROEL; domain 1 / GroEL-like equatorial domain / Chaperonin Cpn60, conserved site / Chaperonins cpn60 signature. / Chaperonin Cpn60/GroEL / GroEL-like equatorial domain superfamily / TCP-1-like chaperonin intermediate domain superfamily / GroEL-like apical domain superfamily / TCP-1/cpn60 chaperonin family / Chaperonin Cpn60/GroEL/TCP-1 family / 2-Layer Sandwich / Orthogonal Bundle / Mainly Alpha / Alpha Beta
Similarity search - Domain/homology
Chaperonin GroEL / 60 kDa chaperonin
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.5 Å
AuthorsRoh, S.H. / Chiu, W.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)P41GM103832 United States
CitationJournal: Proc Natl Acad Sci U S A / Year: 2017
Title: Subunit conformational variation within individual GroEL oligomers resolved by Cryo-EM.
Authors: Soung-Hun Roh / Corey F Hryc / Hyun-Hwan Jeong / Xue Fei / Joanita Jakana / George H Lorimer / Wah Chiu /
Abstract: Single-particle electron cryo-microscopy (cryo-EM) is an emerging tool for resolving structures of conformationally heterogeneous particles; however, each structure is derived from an average of many ...Single-particle electron cryo-microscopy (cryo-EM) is an emerging tool for resolving structures of conformationally heterogeneous particles; however, each structure is derived from an average of many particles with presumed identical conformations. We used a 3.5-Å cryo-EM reconstruction with imposed D7 symmetry to further analyze structural heterogeneity among chemically identical subunits in each GroEL oligomer. Focused classification of the 14 subunits in each oligomer revealed three dominant classes of subunit conformations. Each class resembled a distinct GroEL crystal structure in the Protein Data Bank. The conformational differences stem from the orientations of the apical domain. We mapped each conformation class to its subunit locations within each GroEL oligomer in our dataset. The spatial distributions of each conformation class differed among oligomers, and most oligomers contained 10-12 subunits of the three dominant conformation classes. Adjacent subunits were found to more likely assume the same conformation class, suggesting correlation among subunits in the oligomer. This study demonstrates the utility of cryo-EM in revealing structure dynamics within a single protein oligomer.
History
DepositionMay 31, 2017Deposition site: RCSB / Processing site: RCSB
Revision 1.0Aug 9, 2017Provider: repository / Type: Initial release
Revision 1.1Aug 16, 2017Group: Database references / Refinement description / Category: citation / em_3d_fitting
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.2Sep 20, 2017Group: Author supporting evidence / Category: pdbx_audit_support / Item: _pdbx_audit_support.funding_organization
Revision 1.3Jan 1, 2020Group: Advisory / Author supporting evidence
Category: pdbx_audit_support / pdbx_unobs_or_zero_occ_residues
Item: _pdbx_audit_support.funding_organization
Revision 1.4Mar 13, 2024Group: Data collection / Database references
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_author_list
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

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Assembly

Deposited unit
A: 60 kDa chaperonin
B: 60 kDa chaperonin
C: 60 kDa chaperonin
D: 60 kDa chaperonin
E: 60 kDa chaperonin
F: 60 kDa chaperonin
G: 60 kDa chaperonin
H: 60 kDa chaperonin
I: 60 kDa chaperonin
J: 60 kDa chaperonin
K: 60 kDa chaperonin
L: 60 kDa chaperonin
M: 60 kDa chaperonin
N: 60 kDa chaperonin


Theoretical massNumber of molelcules
Total (without water)772,07214
Polymers772,07214
Non-polymers00
Water1,928107
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area51650 Å2
ΔGint-195 kcal/mol
Surface area289180 Å2
MethodPISA
Number of models4

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Components

#1: Protein
60 kDa chaperonin / GroEL protein / Protein Cpn60


Mass: 55148.020 Da / Num. of mol.: 14
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Gene: mopA, groEL, groL / Production host: Escherichia coli (E. coli) / References: UniProt: Q6Q099, UniProt: P0A6F5*PLUS
#2: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 107 / Source method: isolated from a natural source / Formula: H2O

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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: Wild type GroEL / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightValue: 800 kDa/nm / Experimental value: NO
Source (natural)Organism: Escherichia coli (E. coli)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.2
SpecimenConc.: 0.1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

MicroscopyModel: JEOL 3200FSC
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy
Image recordingElectron dose: 1 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

EM softwareName: RELION / Version: 1.4 / Category: 3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: D7 (2x7 fold dihedral)
3D reconstructionResolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 37367 / Symmetry type: POINT
Atomic model buildingDetails: Regarding negative occupancies: To assess fit-to-density, we derived cross-correlations at the amino acid level and by means of a map/model FSC. To perform this assessment, we generated a ...Details: Regarding negative occupancies: To assess fit-to-density, we derived cross-correlations at the amino acid level and by means of a map/model FSC. To perform this assessment, we generated a weighted map, derived solely from an atomic model that accounted for both ADP of all atoms and weak/negative density of all charged oxygen atoms, and compared it with the experimental map. The weighted map provides a better approximation of the experimental map by simulating map variability as opposed to treating all atoms equally. The correlations for both the FSC and the per-residue assessment showed improvements when properly weighted, further demonstrating that our model provides a good approximation of the experimental data

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