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- PDB-8wrq: Cryo-EM structure of Cas12-1 with 14 nt complementary heteroduplex -

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Basic information

Entry
Database: PDB / ID: 8wrq
TitleCryo-EM structure of Cas12-1 with 14 nt complementary heteroduplex
Components
  • Cas12-1
  • CrRNA
  • NTS
  • TS
KeywordsRNA BINDING PROTEIN/RNA/DNA / Cas12 / RNA BINDING PROTEIN-RNA-DNA complex
Function / homologyDNA / DNA (> 10) / RNA / RNA (> 10)
Function and homology information
Biological speciesunclassified sequences (unknown)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.05 Å
AuthorsZhang, K. / Zhang, X.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)32188102 China
CitationJournal: To Be Published
Title: Cryo-EM structure of Cas12-1 with 14 nt complementary heteroduplex
Authors: Zhang, X. / Zhang, K.
History
DepositionOct 16, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Apr 16, 2025Provider: repository / Type: Initial release
Revision 1.0Apr 16, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Apr 16, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Apr 16, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Apr 16, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Apr 16, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Jun 18, 2025Group: Data collection / Category: em_admin / em_software / Item: _em_admin.last_update / _em_software.name
Revision 1.1Jun 18, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / Category: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Cas12-1
B: CrRNA
C: TS
D: NTS


Theoretical massNumber of molelcules
Total (without water)127,1484
Polymers127,1484
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein Cas12-1


Mass: 83449.094 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) unclassified sequences (unknown) / Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3)
#2: RNA chain CrRNA


Mass: 17834.566 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) unclassified sequences (unknown) / Production host: unclassified sequences (unknown)
#3: DNA chain TS


Mass: 12990.339 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) unclassified sequences (unknown) / Production host: unclassified sequences (unknown)
#4: DNA chain NTS


Mass: 12874.237 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) unclassified sequences (unknown) / Production host: unclassified sequences (unknown)
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: The ternary complex of Cas12-1 with 14 nt complementary heteroduplex
Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: unclassified sequences (unknown)
Source (recombinant)Organism: Escherichia coli BL21(DE3) (bacteria)
Buffer solutionpH: 7.5
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: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 5000 nm / Nominal defocus min: 1200 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM softwareName: PHENIX / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.05 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 162642 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0045296
ELECTRON MICROSCOPYf_angle_d0.6387442
ELECTRON MICROSCOPYf_dihedral_angle_d21.6221188
ELECTRON MICROSCOPYf_chiral_restr0.041849
ELECTRON MICROSCOPYf_plane_restr0.007736

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