9sig

XFEL structure of oxidised Ribonucleotide reductase R2a Y122F mutant from E. coli

Method: X-RAY DIFFRACTION Dmax: 84.2 Å Quality: EXCELLENT

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

Ribonucleoside-diphosphate reductase 1 subunit beta

Escherichia coli

UniProt P69924

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 homooligomer Homooligomer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 2–376 Chain B; UniProt 2–376 Mutation:Y122F FE FE (III) ION × 4 X-RAY DIFFRACTION X-ray crystallization conditions:BATCH MODE;pH 5.5;297 K;0.1M Bis-Tris pH 5.5, PEG 3350 25% Resolution 1.90 Å R-free 0.185

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.

62 other PDB entries and 126 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name RIR2_ECOLI
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–375; UniProt 2–376 Author chain B; PDBConstruct 1–375; UniProt 2–376

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 9sig

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id9sig
Deposition date deposition_date2025-08-28
Structure title titleXFEL structure of oxidised Ribonucleotide reductase R2a Y122F mutant from E. coli
Keywords keywordsRibonucleotide reductase beta subunit, R2a, Di-iron beta subunit, XFEL structure, OXIDOREDUCTASE; OXIDOREDUCTASE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier27.13
Radius of gyration Rg (electron density) rg_electron25.96
Forward intensity I(0) i098658200.00
Molecular weight molecular_weight79280.0 kDa
Excluded volume excluded_volume99501 ų
Envelope volume envelope_volume113290 ų
Hydration-shell volume shell_volume35533 ų
Envelope diameter envelope_diameter88.5
Shell Rg shell_rg34.46
Envelope Rg envelope_rg26.16
Shape Rg shape_rg25.95
Total Rg total_rg26.81
Total atoms total_atoms5580
Residues n_residues681
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 dmax84.2
Rg (real space) rg_real27.03
Rg uncertainty (real space) rg_real_error0.52
I(0) (real space) i0_real9.8660e+07
I(0) uncertainty (real space) i0_real_error1.5080e+06
Rg (reciprocal space) rg_reciprocal27.06
I(0) (reciprocal space) i0_reciprocal98660000.0000
Solution quality estimate total_estimate0.9022
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary31.9
Skewness Skewness skewness0.259
Kurtosis Kurtosis kurtosis-0.435
Angular range angular_range— – 0.2900 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha28570000.0000
Real-space data points n_real_points59
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.933; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.995; Smooth: 0.932

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

8. Citations (1)

9. Files and Curves (10)