SAXSdb — 2cig

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

DIHYDROFOLATE REDUCTASE

MYCOBACTERIUM TUBERCULOSIS

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 1–159	Not recorded	1DG (4R)-ISONICOTINIC-ACETYL-NICOTINAMIDE-ADENINE DINUCLEOTIDE × 1 GOL GLYCEROL × 4 SO4 SULFATE ION × 2	X-RAY DIFFRACTION X-ray crystallization conditions：pH 4.5；1.6 M AMMONIUM SULFATE, 100 MM SODIUM ACETATE, PH 4.6, 10 % GLYCEROL	Resolution 1.90 Å R-free 0.212

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.

Other PDB	Difference from Current Entry 2CIG	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1DF7 DIHYDROFOLATE REDUCTASE OF MYCOBACTERIUM TUBERCULOSIS COMPLEXED WITH NADPH AND METHOTREXATE Deposited 1999-11-17	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–159（159 aa）	Not recorded	SO4 SULFATE ION × 1 NDP NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 1 MTX METHOTREXATE × 1 GOL GLYCEROL × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 4.5；277 K；AMMONIUM SULFATE, SODIUM ACETATE, GLYCEROL, NADPH, METHOTREXATE, POTASSIUM PHOSPHATE, DTT, POTASSIUM CHLORIDE, pH 4.5, VAPOR DIFFUSION, temperature 277K	Resolution 1.70 Å R-free 0.246
1DG5 DIHYDROFOLATE REDUCTASE OF MYCOBACTERIUM TUBERCULOSIS COMPLEXED WITH NADPH AND TRIMETHOPRIM Deposited 1999-11-23	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–159（159 aa）	Not recorded	NDP NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 1 TOP TRIMETHOPRIM × 1 GOL GLYCEROL × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.5；277 K；AMMONIUM SULFATE, SODIUM ACETATE, GLYCEROL, NADPH, TRIMETHOPRIM, POTASSIUM PHOSPHATE, DTT, POTASSIUM CHLORIDE, pH 4.5, VAPOR DIFFUSION, HANGING DROP, temperature 277K	Resolution 2.00 Å R-free 0.243
1DG7 DIHYDROFOLATE REDUCTASE OF MYCOBACTERIUM TUBERCULOSIS COMPLEXED WITH NADPH AND 4-BROMO WR99210 Deposited 1999-11-23	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–159（159 aa）	Not recorded	WRB 1-[3-(4-BROMO-PHENOXY)-PROPOXY]-6,6-DIMETHYL-1.6-DIHYDRO-[1,3,5]TRIAZINE-2,4-DIAMINE × 1 NDP NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 1 GOL GLYCEROL × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.5；277 K；AMMONIUM SULFATE, SODIUM ACETATE, GLYCEROL, NADPH, BROMO-WR99210, POTASSIUM PHOSPHATE, DTT, POTASSIUM CHLORIDE, pH 4.5, VAPOR DIFFUSION, HANGING DROP, temperature 277K	Resolution 1.80 Å R-free 0.246
1DG8 DIHYDROFOLATE REDUCTASE OF MYCOBACTERIUM TUBERCULOSIS COMPLEXED WITH NADPH Deposited 1999-11-23	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–159（159 aa）	Not recorded	NDP NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 1 GOL GLYCEROL × 5	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.5；277 K；AMMONIUM SULFATE, SODIUM ACETATE, GLYCEROL, NADPH, POTASSIUM PHOSPHATE, DTT, POTASSIUM CHLORIDE, pH 4.5, VAPOR DIFFUSION, HANGING DROP, temperature 277K	Resolution 2.00 Å R-free 0.244
4KL9 Crystal structure of dihydrofolate reductase from Mycobacterium tuberculosis in the space group C2 Deposited 2013-05-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–159（159 aa）	Not recorded	NDP NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 1 P33 3,6,9,12,15,18-HEXAOXAICOSANE-1,20-DIOL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；298 K；Mes, PEGMME 2000, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 1.39 Å R-free 0.202
4KLX Crystal structure of dihydrofolate reductase from Mycobacterium tuberculosis in an open conformation. Deposited 2013-05-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–159（159 aa）	Not recorded	ATR 2'-MONOPHOSPHOADENOSINE-5'-DIPHOSPHATE × 1 ETE 2-{2-[2-2-(METHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHANOL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；8% PEG 4000, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.23 Å R-free 0.244
4KLX Crystal structure of dihydrofolate reductase from Mycobacterium tuberculosis in an open conformation. Deposited 2013-05-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–159（159 aa）	Not recorded	ATR 2'-MONOPHOSPHOADENOSINE-5'-DIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；8% PEG 4000, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.23 Å R-free 0.244
4KM0 Crystal structure of dihydrofolate reductase from Mycobacterium tuberculosis in complex with pyrimethamine Deposited 2013-05-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–159（159 aa）	Not recorded	CP6 5-(4-CHLORO-PHENYL)-6-ETHYL-PYRIMIDINE-2,4-DIAMINE × 1 ATR 2'-MONOPHOSPHOADENOSINE-5'-DIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；8% PEG 4000, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.30 Å R-free 0.210
4KM0 Crystal structure of dihydrofolate reductase from Mycobacterium tuberculosis in complex with pyrimethamine Deposited 2013-05-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–159（159 aa）	Not recorded	CP6 5-(4-CHLORO-PHENYL)-6-ETHYL-PYRIMIDINE-2,4-DIAMINE × 1 ATR 2'-MONOPHOSPHOADENOSINE-5'-DIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；8% PEG 4000, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.30 Å R-free 0.210
4KM2 Crystal structure of Dihydrofolate reductase from Mycobacterium tuberculosis in an open conformation in complex with trimethoprim Deposited 2013-05-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–159（159 aa）	Not recorded	ATR 2'-MONOPHOSPHOADENOSINE-5'-DIPHOSPHATE × 1 TOP TRIMETHOPRIM × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.05M KCl, 0.01M MgCl2, 15% PEG 6000, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.40 Å R-free 0.201
4KM2 Crystal structure of Dihydrofolate reductase from Mycobacterium tuberculosis in an open conformation in complex with trimethoprim Deposited 2013-05-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–159（159 aa）	Not recorded	ATR 2'-MONOPHOSPHOADENOSINE-5'-DIPHOSPHATE × 1 TOP TRIMETHOPRIM × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；0.05M KCl, 0.01M MgCl2, 15% PEG 6000, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.40 Å R-free 0.201
4KNE Crystal structure of dihydrofolate reductase from Mycobacterium tuberculosis in complex with cycloguanil Deposited 2013-05-09	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–159（159 aa）	Not recorded	1CY 1-(4-chlorophenyl)-6,6-dimethyl-1,6-dihydro-1,3,5-triazine-2,4-diamine × 1 ATR 2'-MONOPHOSPHOADENOSINE-5'-DIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；8% PEG 4000, pH 7.0, VAPOR DIFFUSION, SITTING DROP	Resolution 2.00 Å R-free 0.270
4KNE Crystal structure of dihydrofolate reductase from Mycobacterium tuberculosis in complex with cycloguanil Deposited 2013-05-09	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–159（159 aa）	Not recorded	1CY 1-(4-chlorophenyl)-6,6-dimethyl-1,6-dihydro-1,3,5-triazine-2,4-diamine × 1 ATR 2'-MONOPHOSPHOADENOSINE-5'-DIPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；8% PEG 4000, pH 7.0, VAPOR DIFFUSION, SITTING DROP	Resolution 2.00 Å R-free 0.270
4M2X Mycobacterium tuberculosis dihydrofolate reductase complexed with trimetrexate (TMQ) Deposited 2013-08-05	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–159（159 aa）	Not recorded	NDP NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 1 TMQ TRIMETREXATE × 1 ACT ACETATE ION × 6 PO4 PHOSPHATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.6；289 K；15% PEG 6000, 100 mM sodium acetate, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 289K	Resolution 2.26 Å R-free 0.261
4M2X Mycobacterium tuberculosis dihydrofolate reductase complexed with trimetrexate (TMQ) Deposited 2013-08-05	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain C 1–159（159 aa）	Not recorded	NDP NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 1 TMQ TRIMETREXATE × 1 ACT ACETATE ION × 6	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.6；289 K；15% PEG 6000, 100 mM sodium acetate, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 289K	Resolution 2.26 Å R-free 0.261
4M2X Mycobacterium tuberculosis dihydrofolate reductase complexed with trimetrexate (TMQ) Deposited 2013-08-05	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 3 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain E 1–159（159 aa）	Not recorded	NDP NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 1 TMQ TRIMETREXATE × 1 ACT ACETATE ION × 6	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.6；289 K；15% PEG 6000, 100 mM sodium acetate, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 289K	Resolution 2.26 Å R-free 0.261
4M2X Mycobacterium tuberculosis dihydrofolate reductase complexed with trimetrexate (TMQ) Deposited 2013-08-05	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 4 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain G 1–159（159 aa）	Not recorded	NDP NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 1 TMQ TRIMETREXATE × 1 ACT ACETATE ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.6；289 K；15% PEG 6000, 100 mM sodium acetate, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 289K	Resolution 2.26 Å R-free 0.261

10 other PDB entries and 17 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	DYR_MYCTU
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–159； UniProt 1–159

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.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	2cig
Deposition date deposition_date	2006-03-20
Structure title title	Dihydrofolate reductase from Mycobacterium tuberculosis inhibited by the acyclic 4R isomer of INH-NADP a derivative of the prodrug isoniazid.
Keywords keywords	NADP, ISONIAZID, REDUCTASE, INHIBITOR, BISUBSTRATE, TUBERCULOSIS, OXIDOREDUCTASE, ONE-CARBON METABOLISM; OXIDOREDUCTASE
Experimental Method method	X-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier	16.57 Å
Radius of gyration Rg (electron density) rg_electron	15.22 Å
Forward intensity I(0) i0	7640870.00
Molecular weight molecular_weight	19048.0 kDa
Excluded volume excluded_volume	23355 Å³
Envelope volume envelope_volume	26499 Å³
Hydration-shell volume shell_volume	14568 Å³
Envelope diameter envelope_diameter	51.3 Å
Shell Rg shell_rg	21.21 Å
Envelope Rg envelope_rg	15.54 Å
Shape Rg shape_rg	15.20 Å
Total Rg total_rg	16.30 Å
Total atoms total_atoms	1334
Residues n_residues	159
Spherical-harmonic order n_harmonics	20
q range q_range	— – 0.5000 Å⁻¹
Data points n_points	101
Shell type shell_type	directional
Solvent electron density solvent_density	0.3340 e/Å³
Shell contrast contrast_shell	0.0300 e/Å³
CRYSOL version crysol_version	4.1.3

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

Maximum dimension Dmax dmax	53.0 Å
Rg (real space) rg_real	16.45 Å
Rg uncertainty (real space) rg_real_error	0.25 Å
I(0) (real space) i0_real	7.6410e+06
I(0) uncertainty (real space) i0_real_error	8.7080e+04
Rg (reciprocal space) rg_reciprocal	16.46 Å
I(0) (reciprocal space) i0_reciprocal	7641000.0000
Solution quality estimate total_estimate	0.8910
Solution quality rating solution_quality	GOOD a GOOD solution
P(r) peaks n_peaks	2
Primary peak position r_peak_primary	22.0 Å
Skewness Skewness skewness	0.128
Kurtosis Kurtosis kurtosis	-0.404
Angular range angular_range	— – 0.4800 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	2026000.0000
Real-space data points n_real_points	78
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.863; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.994; Smooth: 0.994

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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (5)

Entity 1 Entity 1 polymer

Description description	DIHYDROFOLATE REDUCTASE
Molecular weight formula_weight	17659.0 kDa
EC 编号 ec_number	1.5.1.3
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	1471

MVGLIWAQATSGVIGRGGDIPWRLPEDQAHFREITMGHTIVMGRRVWDSLPAKVRPLPGRRNVVLSRQADFMASGAEVVGSLEEALTSPETWVIGGGQVYALALPYATRCEVTEVDIGLPREAGDALAPVLDETWRGETGEWRFSRSGLRYRLYSYHRS

来源 Source

来源生物 organism	MYCOBACTERIUM TUBERCULOSIS
NCBI Class编号 ncbi_taxonomy_id	83332
宿主生物 host_organism	ESCHERICHIA COLI

Entity 2 Entity 2 non-polymer

Description description	(4R)-ISONICOTINIC-ACETYL-NICOTINAMIDE-ADENINE DINUCLEOTIDE
Molecular weight formula_weight	850.5 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 3 Entity 3 non-polymer

Description description	GLYCEROL
Molecular weight formula_weight	92.1 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 4 Entity 4 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	137

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7. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d2ciga_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.71 — Dihydrofolate reductase-like
Superfamily Superfamily superfamily	c.71.1 — Dihydrofolate reductase-like
Family Family family	c.71.1.1 — Dihydrofolate reductases

CATH v4.4 (1 domains)

Domain ID domain_id	2cigA00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	430 — Dihydrofolate Reductase, subunit A
Homologous superfamily homologous superfamily	10 — Dihydrofolate Reductase, subunit A

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8. Citations (1)

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Unit-cell length a length_a	60.670 Å
Unit-cell length b length_b	60.670 Å
Unit-cell length c length_c	59.147 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	P 41
Space-group number int_tables_number	76
Crystal system crystal_system	—

Resolution resolution	1.900 Å
Low-resolution limit resolution_low	60.630 Å
R factor r_factor	0.1800
R_work r_work	0.1780
R_free r_free	0.2120

fit	/app/data/saxs_computation/ci/2cig/2cig.fit
pddf	/app/data/pr_computation/ci/2cig/2cig.pr.out
profile	/app/data/saxs_computation/ci/2cig/2cig.dat

Dihydrofolate reductase from Mycobacterium tuberculosis inhibited by the acyclic 4R isomer of INH-NADP a derivative of the prodrug isoniazid.

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

DIHYDROFOLATE REDUCTASE

State in the Current Structure

Other States of the Same Protein in the Database

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

2. Structure Basics 2. Structure Basics

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

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

5. Crystallography and Experiment 5. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction