9ulo

Cryo-EM structure of Human Mre11-Nbs1 complex

Method: ELECTRON MICROSCOPY Dmax: 108.8 Å Quality: GOOD

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

Double-strand break repair protein MRE11

Homo sapiens

UniProt P49959

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 3 PDB declaration: trimeric(3) Consistent with protein copy count Chain A; UniProt 1–708 Chain B; UniProt 1–708 Not recorded Nibrin × 1 (O60934) MN MANGANESE (II) ION × 4 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.5 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.91 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.

8 other PDB entries and 9 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name MRE11_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–708; UniProt 1–708 Author chain B; PDBConstruct 1–708; UniProt 1–708

Nibrin

Homo sapiens

UniProt O60934

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 3 PDB declaration: trimeric(3) Consistent with protein copy count Chain C; UniProt 1–754 Not recorded Double-strand break repair protein MRE11 × 2 (P49959) MN MANGANESE (II) ION × 4 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.5 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.91 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.

6 other PDB entries and 12 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name NBN_HUMAN
Isoform
PDB entities 2
Chains and sequence ranges Author chain C; PDBConstruct 1–754; UniProt 1–754

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 9ulo

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id9ulo
Deposition date deposition_date2025-04-20
Structure title titleCryo-EM structure of Human Mre11-Nbs1 complex
Keywords keywordsNuclease activity, complex, double-strand break repair, 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_guinier33.24
Radius of gyration Rg (electron density) rg_electron32.73
Forward intensity I(0) i0147773000.00
Molecular weight molecular_weight97670.0 kDa
Excluded volume excluded_volume122500 ų
Envelope volume envelope_volume154700 ų
Hydration-shell volume shell_volume39958 ų
Envelope diameter envelope_diameter116.0
Shell Rg shell_rg38.89
Envelope Rg envelope_rg33.06
Shape Rg shape_rg32.77
Total Rg total_rg33.12
Total atoms total_atoms13671
Residues n_residues855
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 dmax108.8
Rg (real space) rg_real33.25
Rg uncertainty (real space) rg_real_error0.76
I(0) (real space) i0_real1.4780e+08
I(0) uncertainty (real space) i0_real_error2.2240e+06
Rg (reciprocal space) rg_reciprocal33.25
I(0) (reciprocal space) i0_reciprocal147800000.0000
Solution quality estimate total_estimate0.8922
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary34.0
Skewness Skewness skewness0.304
Kurtosis Kurtosis kurtosis-0.504
Angular range angular_range— – 0.2400 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha27850000.0000
Real-space data points n_real_points49
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.908; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.976; Smooth: 0.895

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

8. Citations (1)

9. Files and Curves (10)