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- PDB-9n4w: Decameric Glucose-6-phosphate isomerase from Azotobacter vinelandii -

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Basic information

Entry
Database: PDB / ID: 9n4w
TitleDecameric Glucose-6-phosphate isomerase from Azotobacter vinelandii
ComponentsGlucose-6-phosphate isomerase
KeywordsISOMERASE / Glycolysis / decamer
Function / homology
Function and homology information


glucose-6-phosphate isomerase / glucose-6-phosphate isomerase activity / glucose 6-phosphate metabolic process / carbohydrate derivative binding / monosaccharide binding / gluconeogenesis / glycolytic process / cytosol
Similarity search - Function
Phosphoglucose isomerase, C-terminal / Phosphoglucose isomerase signature 1. / Phosphoglucose isomerase (PGI) / Phosphoglucose isomerase, conserved site / Phosphoglucose isomerase, SIS domain 1 / Phosphoglucose isomerase, SIS domain 2 / Phosphoglucose isomerase / Phosphoglucose isomerase signature 2. / Glucose-6-phosphate isomerase family profile. / SIS domain superfamily
Similarity search - Domain/homology
Glucose-6-phosphate isomerase
Similarity search - Component
Biological speciesAzotobacter vinelandii (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.5 Å
AuthorsWarmack, R.A. / Maggiolo, A.O.
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM143836 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM152765 United States
CitationJournal: Structure / Year: 2025
Title: CryoEM-enabled visual proteomics reveals de novo structures of oligomeric protein complexes.
Authors: Yuanbo Shen / Ailiena O Maggiolo / Tianzheng Zhang / Rebeccah A Warmack /
Abstract: Single particle cryoelectron microscopy (cryoEM) and cryoelectron tomography (cryoET) are powerful methods for unveiling unique and functionally relevant structural states. Aided by mass spectrometry ...Single particle cryoelectron microscopy (cryoEM) and cryoelectron tomography (cryoET) are powerful methods for unveiling unique and functionally relevant structural states. Aided by mass spectrometry and machine learning, they promise to facilitate the visual exploration of proteomes. Leveraging visual proteomics, we interrogate structures isolated from a complex cellular milieu by cryoEM to identify and classify molecular structures and complexes de novo. By comparing three automated model building programs, CryoID, DeepTracer, and ModelAngelo, we determine the identity of six distinct oligomeric protein complexes from partially purified extracts of the nitrogen-fixing bacterium Azotobacter vinelandii using both anaerobic and aerobic cryoEM, including two original oligomeric structures. Overall, by allowing the study of near-native oligomeric protein states, cryoEM-enabled visual proteomics reveals unique structures that correspond to relevant species observed in situ.
History
DepositionFeb 3, 2025Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 16, 2025Provider: repository / Type: Initial release
Revision 1.1Jul 30, 2025Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _em_admin.last_update
Revision 1.2Sep 17, 2025Group: Data collection / Database references / Category: citation / em_admin
Item: _citation.journal_volume / _citation.page_first / _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Glucose-6-phosphate isomerase
B: Glucose-6-phosphate isomerase
C: Glucose-6-phosphate isomerase
D: Glucose-6-phosphate isomerase
E: Glucose-6-phosphate isomerase
F: Glucose-6-phosphate isomerase
G: Glucose-6-phosphate isomerase
H: Glucose-6-phosphate isomerase
I: Glucose-6-phosphate isomerase
J: Glucose-6-phosphate isomerase


Theoretical massNumber of molelcules
Total (without water)619,78110
Polymers619,78110
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein
Glucose-6-phosphate isomerase / GPI / Phosphoglucose isomerase / PGI / Phosphohexose isomerase / PHI


Mass: 61978.125 Da / Num. of mol.: 10 / Source method: isolated from a natural source / Source: (natural) Azotobacter vinelandii (bacteria) / Strain: DJ / References: UniProt: C1DDK7, glucose-6-phosphate isomerase
Has protein modificationN

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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: Decameric complex of Glucose-6-phosphate isomerase / Type: COMPLEX / Entity ID: all / Source: NATURAL
Source (natural)Organism: Azotobacter vinelandii (bacteria) / Strain: DJ
Buffer solutionpH: 7.8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE-PROPANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: -3000 nm / Nominal defocus min: -800 nm
Image recordingElectron dose: 60 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM softwareName: PHENIX / Version: 1.20.1_4487 / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: D5 (2x5 fold dihedral)
3D reconstructionResolution: 2.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 70453 / Symmetry type: POINT
RefinementHighest resolution: 2.5 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00444370
ELECTRON MICROSCOPYf_angle_d0.53860240
ELECTRON MICROSCOPYf_dihedral_angle_d4.2296010
ELECTRON MICROSCOPYf_chiral_restr0.0416440
ELECTRON MICROSCOPYf_plane_restr0.0057870

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