9mb6

Cryo-EM structure of wild-type SaCas9-guide RNA-mismatched target DNA complex

Method: ELECTRON MICROSCOPY Dmax: 118.7 Å Quality: GOOD

1. Protein Identity and Related Structures Protein Identity & Related Structures

Ubiquitin-like protein SMT3,CRISPR-associated endonuclease Cas9

Staphylococcus aureus

UniProt J7RUA5

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Insufficient information Monomer Protein × 1 DNA 2 RNA 1 PDB declaration: tetrameric(4) Consistent with all polymer counts Chain A; UniProt 1–1053 Not recorded target DNA strand × 1 sgRNA × 1 non-target DNA strand × 1 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.6 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.01 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

15 other PDB entries and 15 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name CAS9_STAAU
Isoform
PDB entities 2
Chains and sequence ranges Author chain A; PDBConstruct 118–1170; UniProt 1–1053

Ubiquitin-like protein SMT3,CRISPR-associated endonuclease Cas9

Staphylococcus aureus

UniProt Q12306

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Insufficient information Monomer Protein × 1 DNA 2 RNA 1 PDB declaration: tetrameric(4) Consistent with all polymer counts Chain A; UniProt 3–98 Not recorded target DNA strand × 1 sgRNA × 1 non-target DNA strand × 1 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.6 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.01 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

95 other PDB entries and 116 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name SMT3_YEAST
Isoform
PDB entities 2
Chains and sequence ranges Author chain A; PDBConstruct 13–108; UniProt 3–98

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

SAXS profile for 9mb6

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 9mb6
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2. Structure Basics 2. Structure Basics

Entry ID entry_id9mb6
Deposition date deposition_date2025-03-15
Structure title titleCryo-EM structure of wild-type SaCas9-guide RNA-mismatched target DNA complex
Keywords keywordsCRISPR-CAS9, GENOME ENGINEERING, HYDROLASE-RNA-DNA COMPLEX, DNA BINDING PROTEIN; DNA BINDING PROTEIN
Experimental Method methodELECTRON MICROSCOPY

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier36.26
Radius of gyration Rg (electron density) rg_electron35.78
Forward intensity I(0) i0624246000.00
Molecular weight molecular_weight168340.0 kDa
Excluded volume excluded_volume196030 ų
Envelope volume envelope_volume274790 ų
Hydration-shell volume shell_volume61971 ų
Envelope diameter envelope_diameter126.1
Shell Rg shell_rg43.68
Envelope Rg envelope_rg35.52
Shape Rg shape_rg35.78
Total Rg total_rg36.21
Total atoms total_atoms11637
Residues n_residues1142
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax118.7
Rg (real space) rg_real36.15
Rg uncertainty (real space) rg_real_error0.80
I(0) (real space) i0_real6.2420e+08
I(0) uncertainty (real space) i0_real_error9.7920e+06
Rg (reciprocal space) rg_reciprocal36.22
I(0) (reciprocal space) i0_reciprocal624300000.0000
Solution quality estimate total_estimate0.8845
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary45.9
Skewness Skewness skewness0.272
Kurtosis Kurtosis kurtosis-0.293
Angular range angular_range— – 0.2200 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha86370000.0000
Real-space data points n_real_points45
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.861; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.997; Smooth: 0.914

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

8. Citations (1)

9. Files and Curves (10)