1keb

Crystal Structure of Double Mutant M37L,P40S E.coli Thioredoxin

Method: X-RAY DIFFRACTION Dmax: 69.9 Å Quality: GOOD

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

Thioredoxin 1

Escherichia coli

UniProt P0AA25

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 monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count Chain A; UniProt 1–108 Mutation:M37L,P40S CU COPPER (II) ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 3.8;300 K;100mM sodium acetate buffer, 10mM cupric acetate, 25% ethanol as precipitant, pH 3.8, VAPOR DIFFUSION, HANGING DROP, temperature 300K Resolution 1.80 Å R-free 0.222
2 Protein monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count Chain B; UniProt 1–108 Mutation:M37L,P40S CU COPPER (II) ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 3.8;300 K;100mM sodium acetate buffer, 10mM cupric acetate, 25% ethanol as precipitant, pH 3.8, VAPOR DIFFUSION, HANGING DROP, temperature 300K Resolution 1.80 Å R-free 0.222

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.

52 other PDB entries and 99 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name THIO_ECOLI
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–108; UniProt 1–108 Author chain B; PDBConstruct 1–108; UniProt 1–108

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 1keb

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1keb
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2. Structure Basics 2. Structure Basics

Entry ID entry_id1keb
Deposition date deposition_date2001-11-15
Structure title titleCrystal Structure of Double Mutant M37L,P40S E.coli Thioredoxin
Keywords keywordsThioredoxin fold, Proline, alpha-helix, ELECTRON TRANSPORT; ELECTRON TRANSPORT
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier21.17
Radius of gyration Rg (electron density) rg_electron20.53
Forward intensity I(0) i09227250.00
Molecular weight molecular_weight23412.0 kDa
Excluded volume excluded_volume29656 ų
Envelope volume envelope_volume36619 ų
Hydration-shell volume shell_volume15874 ų
Envelope diameter envelope_diameter68.7
Shell Rg shell_rg25.35
Envelope Rg envelope_rg20.45
Shape Rg shape_rg20.54
Total Rg total_rg21.23
Total atoms total_atoms1644
Residues n_residues216
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 dmax69.9
Rg (real space) rg_real21.26
Rg uncertainty (real space) rg_real_error0.49
I(0) (real space) i0_real9.2270e+06
I(0) uncertainty (real space) i0_real_error1.1570e+05
Rg (reciprocal space) rg_reciprocal21.24
I(0) (reciprocal space) i0_reciprocal9227000.0000
Solution quality estimate total_estimate0.8624
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary22.6
Skewness Skewness skewness0.424
Kurtosis Kurtosis kurtosis-0.446
Angular range angular_range— – 0.3750 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha2006000.0000
Real-space data points n_real_points69
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.776; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.922; Smooth: 0.958

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd1keba_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.47 — Thioredoxin fold
Superfamily Superfamily superfamilyc.47.1 — Thioredoxin-like
Family Family familyc.47.1.1 — Thioltransferase
Domain ID domain_idd1kebb_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.47 — Thioredoxin fold
Superfamily Superfamily superfamilyc.47.1 — Thioredoxin-like
Family Family familyc.47.1.1 — Thioltransferase

CATH v4.4 (2 domains)

Domain ID domain_id1kebA00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology30 — Glutaredoxin
Homologous superfamily homologous superfamily10 — Glutaredoxin
Domain ID domain_id1kebB00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology30 — Glutaredoxin
Homologous superfamily homologous superfamily10 — Glutaredoxin

8. Citations (1)

9. Files and Curves (10)