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- PDB-9k83: Cryo-EM structure of designed zinc-induced filament Fiber-n6-Zn1-... -

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Basic information

Entry
Database: PDB / ID: 9k83
TitleCryo-EM structure of designed zinc-induced filament Fiber-n6-Zn1-HEHE-43
ComponentsFiber-n6-Zn1-HEHE-43
KeywordsMETAL BINDING PROTEIN / Zinc-binding protein
Biological speciesEscherichia coli (E. coli)
MethodELECTRON MICROSCOPY / helical reconstruction / cryo EM / Resolution: 3.64 Å
AuthorsQu, Y.N. / Cao, L.X.
Funding support China, 1items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China) China
CitationJournal: To Be Published
Title: De novo design of metal ion regulated protein assemblies
Authors: Qu, Y.N. / Cao, L.X.
History
DepositionOct 24, 2024Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Oct 29, 2025Provider: repository / Type: Initial release
Revision 1.0Oct 29, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Oct 29, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Oct 29, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Oct 29, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Oct 29, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Fiber-n6-Zn1-HEHE-43
B: Fiber-n6-Zn1-HEHE-43
C: Fiber-n6-Zn1-HEHE-43
D: Fiber-n6-Zn1-HEHE-43
E: Fiber-n6-Zn1-HEHE-43
F: Fiber-n6-Zn1-HEHE-43
G: Fiber-n6-Zn1-HEHE-43
H: Fiber-n6-Zn1-HEHE-43
I: Fiber-n6-Zn1-HEHE-43
J: Fiber-n6-Zn1-HEHE-43
K: Fiber-n6-Zn1-HEHE-43
L: Fiber-n6-Zn1-HEHE-43
M: Fiber-n6-Zn1-HEHE-43
N: Fiber-n6-Zn1-HEHE-43
O: Fiber-n6-Zn1-HEHE-43
P: Fiber-n6-Zn1-HEHE-43
Q: Fiber-n6-Zn1-HEHE-43
R: Fiber-n6-Zn1-HEHE-43
S: Fiber-n6-Zn1-HEHE-43
T: Fiber-n6-Zn1-HEHE-43
U: Fiber-n6-Zn1-HEHE-43
hetero molecules


Theoretical massNumber of molelcules
Total (without water)545,15663
Polymers542,40821
Non-polymers2,74742
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 ...
Fiber-n6-Zn1-HEHE-43


Mass: 25828.971 Da / Num. of mol.: 21
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Production host: Escherichia coli (E. coli)
#2: Chemical...
ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 42 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY
Has protein modificationN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: FILAMENT / 3D reconstruction method: helical reconstruction

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Sample preparation

ComponentName: Fiber-n6-Zn1-HEHE-43 / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightValue: 23.55 kDa/nm / Experimental value: YES
Source (natural)Organism: Escherichia coli (E. coli)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7
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: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 1500 nm
Image recordingElectron dose: 50 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
Helical symmertyAngular rotation/subunit: 70.794 ° / Axial rise/subunit: 6.336 Å / Axial symmetry: C1
3D reconstructionResolution: 3.64 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 378860 / Symmetry type: HELICAL
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00334734
ELECTRON MICROSCOPYf_angle_d0.77547040
ELECTRON MICROSCOPYf_dihedral_angle_d4.3564557
ELECTRON MICROSCOPYf_chiral_restr0.0435985
ELECTRON MICROSCOPYf_plane_restr0.0055901

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