3nxr

Perferential Selection of Isomer Binding from Chiral Mixtures: Alternate Binding Modes Observed for the E- and Z-isomers of a Series of 5-Substituted 2,4-Diaminofuro[2,3-d]pyrimidines as Ternary Complexes with NADPH and Human Dihydrofolate Reductase

Method: X-RAY DIFFRACTION Dmax: 54.1 Å Quality: GOOD

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

Dihydrofolate reductase

Homo sapiens

UniProt P00374

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 2–187 Not recorded NDP NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 1 SO4 SULFATE ION × 4 D2D 5-[(1E)-2-(2-methoxyphenyl)-4-methylpent-1-en-1-yl]furo[2,3-d]pyrimidine-2,4-diamine × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 6.9;298 K;100 mM K2PO4 with 60% satrated ammonium sulfate with 3% v/v ethanol, pH 6.9, VAPOR DIFFUSION, HANGING DROP, temperature 298K Resolution 1.35 Å R-free 0.223

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.

88 other PDB entries and 105 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name DYR_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–186; UniProt 2–187

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 3nxr

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 3nxr
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2. Structure Basics 2. Structure Basics

Entry ID entry_id3nxr
Deposition date deposition_date2010-07-14
Structure title titlePerferential Selection of Isomer Binding from Chiral Mixtures: Alternate Binding Modes Observed for the E- and Z-isomers of a Series of 5-Substituted 2,4-Diaminofuro[2,3-d]pyrimidines as Ternary Complexes with NADPH and Human Dihydrofolate Reductase
Keywords keywordschiral selection E- Z-isomers, OXIDOREDUCTASE; OXIDOREDUCTASE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier17.45
Radius of gyration Rg (electron density) rg_electron16.08
Forward intensity I(0) i09923080.00
Molecular weight molecular_weight22775.0 kDa
Excluded volume excluded_volume28281 ų
Envelope volume envelope_volume31942 ų
Hydration-shell volume shell_volume16374 ų
Envelope diameter envelope_diameter54.3
Shell Rg shell_rg22.38
Envelope Rg envelope_rg16.46
Shape Rg shape_rg16.05
Total Rg total_rg17.20
Total atoms total_atoms1594
Residues n_residues186
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 dmax54.1
Rg (real space) rg_real17.32
Rg uncertainty (real space) rg_real_error0.22
I(0) (real space) i0_real9.9230e+06
I(0) uncertainty (real space) i0_real_error1.0970e+05
Rg (reciprocal space) rg_reciprocal17.33
I(0) (reciprocal space) i0_reciprocal9923000.0000
Solution quality estimate total_estimate0.8933
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary23.1
Skewness Skewness skewness0.102
Kurtosis Kurtosis kurtosis-0.391
Angular range angular_range— – 0.4550 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha1894000.0000
Real-space data points n_real_points76
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.882; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.987; Smooth: 0.975

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (5)

7. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_idd3nxra_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.71 — Dihydrofolate reductase-like
Superfamily Superfamily superfamilyc.71.1 — Dihydrofolate reductase-like
Family Family familyc.71.1.1 — Dihydrofolate reductases

CATH v4.4 (1 domains)

Domain ID domain_id3nxrA00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology430 — Dihydrofolate Reductase, subunit A
Homologous superfamily homologous superfamily10 — Dihydrofolate Reductase, subunit A

8. Citations (1)

9. Files and Curves (10)