6mus

Electron Microscopy
3.6Å resolution

Cryo-EM structure of larger Csm-crRNA-target RNA ternary complex in type III-A CRISPR-Cas system

Released:

Function and Biology Details

Structure analysis Details

Assembly composition:
hetero decamer (preferred)
Entry contents:
5 distinct polypeptide molecules
2 distinct RNA molecules
Macromolecules (7 distinct):
CRISPR system single-strand-specific deoxyribonuclease Cas10/Csm1 (subtype III-A) Chain: A
Molecule details ›
Chain: A
Length: 791 amino acids
Theoretical weight: 89.68 KDa
Source organism: Thermococcus onnurineus
Expression system: Escherichia coli
UniProt:
  • Canonical: B6YWB8 (Residues: 1-777; Coverage: 100%)
Gene names: TON_0893, cas10, csm1
Sequence domains:
CRISPR system Cms protein Csm2 Chains: B, J
Molecule details ›
Chains: B, J
Length: 187 amino acids
Theoretical weight: 21.21 KDa
Source organism: Thermococcus onnurineus
Expression system: Escherichia coli
UniProt:
  • Canonical: B6YWB9 (Residues: 1-186; Coverage: 100%)
Gene name: TON_0894
Sequence domains: Csm2 Type III-A
CRISPR system Cms endoribonuclease Csm3 Chains: C, D, K
Molecule details ›
Chains: C, D, K
Length: 291 amino acids
Theoretical weight: 32.77 KDa
Source organism: Thermococcus onnurineus
Expression system: Escherichia coli
UniProt:
  • Canonical: B6YWC0 (Residues: 1-290; Coverage: 100%)
Gene name: TON_0895
Sequence domains: RAMP superfamily
CRISPR system Cms protein Csm4 Chain: E
Molecule details ›
Chain: E
Length: 289 amino acids
Theoretical weight: 32.35 KDa
Source organism: Thermococcus onnurineus
Expression system: Escherichia coli
UniProt:
  • Canonical: B6YWC1 (Residues: 1-289; Coverage: 100%)
Gene names: TON_0896, csm4
CRISPR system Cms protein Csm5 Chain: F
Molecule details ›
Chain: F
Length: 403 amino acids
Theoretical weight: 46.09 KDa
Source organism: Thermococcus onnurineus
Expression system: Escherichia coli
UniProt:
  • Canonical: B6YWC2 (Residues: 1-397; Coverage: 100%)
Gene name: TON_0897
Sequence domains: RAMP superfamily
RNA (33-MER) Chain: G
Molecule details ›
Chain: G
Length: 38 nucleotides
Theoretical weight: 12.46 KDa
RNA (25-MER) Chain: H
Molecule details ›
Chain: H
Length: 40 nucleotides
Theoretical weight: 12.75 KDa

Ligands and Environments

1 bound ligand:
No modified residues

Experiments and Validation Details

Entry percentile scores
Resolution: 3.6Å
Relevant EMDB volumes: EMD-9254
Expression system: Escherichia coli