SAXSdb — 1j3j

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

Bifunctional dihydrofolate reductase-thymidylate synthase

Plasmodium falciparum

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	5-(4-CHLORO-PHENYL)-6-ETHYL-PYRIMIDINE-2,4-DIAMINE × 2 NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 2 ;2'-DEOXYURIDINE 5'-MONOPHOSPHATE ; × 2 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	DRTS_PLAFK
Isoform	—
PDB entities	1, 2
Chains and sequence ranges	Author chain A； PDBConstruct 1–280； UniProt 1–280 Author chain B； PDBConstruct 1–280； UniProt 1–280 Author chain C； PDBConstruct 1–328； UniProt 281–608 Author chain D； PDBConstruct 1–328； UniProt 281–608

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	1j3j
Deposition date deposition_date	2003-02-03
Structure title title	Double mutant (C59R+S108N) Plasmodium falciparum dihydrofolate reductase-thymidylate synthase (PfDHFR-TS) complexed with pyrimethamine, NADPH, and dUMP
Keywords keywords	bifunctional, OXIDOREDUCTASE, TRANSFERASE; OXIDOREDUCTASE, TRANSFERASE
Experimental Method method	X-RAY DIFFRACTION

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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

1j3j__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

1j3j__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1j3j__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	34.75 Å
Rg (electron density)	33.70 Å
Total Rg	34.43 Å
Atom count	9228
Residues	1089
Excluded volume	164940 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1j3j__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (6)

Entity 1 Entity 1 polymer

Description description	Bifunctional dihydrofolate reductase-thymidylate synthase
Molecular weight formula_weight	33214.3 kDa
EC 编号 ec_number	1.5.1.3, 2.1.1.45
Mutation mutation	C59R, S108N
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	9961

MMEQVCDVFDIYAICACCKVESKNEGKKNEVFNNYTFRGLGNKGVLPWKCNSLDMKYFRAVTTYVNESKYEKLKYKRCKYLNKETVDNVNDMPNSKKLQNVVVMGRTNWESIPKKFKPLSNRINVILSRTLKKEDFDEDVYIINKVEDLIVLLGKLNYYKCFIIGGSVVYQEFLEKKLIKKIYFTRINSTYECDVFFPEINENEYQIISVSDVYTSNNTTLDFIIYKKTNNKMLNEQNCIKGEEKNNDMPLKNDDKDTCHMKKLTEFYKNVDKYKINYEN

Source Source

Source organism organism	Plasmodium falciparum
Common name common_name	malaria parasite P. falciparum
NCBI taxonomy ID ncbi_taxonomy_id	5833
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 polymer

Description description	Bifunctional dihydrofolate reductase-thymidylate synthase
Molecular weight formula_weight	38712.9 kDa
EC 编号 ec_number	1.5.1.3, 2.1.1.45
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C,D

DDDDEEEDDFVYFNFNKEKEEKNKNSIHPNDFQIYNSLKYKYHPEYQYLNIIYDIMMNGNKQSDRTGVGVLSKFGYIMKFDLSQYFPLLTTKKLFLRGIIEELLWFIRGETNGNTLLNKNVRIWEANGTREFLDNRKLFHREVNDLGPIYGFQWRHFGAEYTNMYDNYENKGVDQLKNIINLIKNDPTSRRILLCAWNVKDLDQMALPPCHILCQFYVFDGKLSCIMYQRSCDLGLGVPFNIASYSIFTHMIAQVCNLQPAQFIHVLGNAHVYNNHIDSLKIQLNRIPYPFPTLKLNPDIKNIEDFTISDFTIQNYVHHEKISMDMAA

Source Source

Source organism organism	Plasmodium falciparum
Common name common_name	malaria parasite P. falciparum
NCBI taxonomy ID ncbi_taxonomy_id	5833
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 3 Entity 3 non-polymer

Description description	5-(4-CHLORO-PHENYL)-6-ETHYL-PYRIMIDINE-2,4-DIAMINE
Molecular weight formula_weight	248.7 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 non-polymer

Description description	NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
Molecular weight formula_weight	745.4 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 5 Entity 5 non-polymer

Description description	;2'-DEOXYURIDINE 5'-MONOPHOSPHATE ;
Molecular weight formula_weight	308.2 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	733

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1j3ja_
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

Domain ID domain_id	d1j3jb_
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

Domain ID domain_id	d1j3jc_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.117 — Thymidylate synthase/dCMP hydroxymethylase
Superfamily Superfamily superfamily	d.117.1 — Thymidylate synthase/dCMP hydroxymethylase
Family Family family	d.117.1.1 — Thymidylate synthase/dCMP hydroxymethylase

Domain ID domain_id	d1j3jd_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.117 — Thymidylate synthase/dCMP hydroxymethylase
Superfamily Superfamily superfamily	d.117.1 — Thymidylate synthase/dCMP hydroxymethylase
Family Family family	d.117.1.1 — Thymidylate synthase/dCMP hydroxymethylase

CATH v4.4 (4 domains)

Domain ID domain_id	1j3jA00
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

Domain ID domain_id	1j3jB00
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

Domain ID domain_id	1j3jC00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	572 — Thymidylate Synthase; Chain A
Homologous superfamily homologous superfamily	10 — Thymidylate synthase/dCMP hydroxymethylase domain

Domain ID domain_id	1j3jD00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	572 — Thymidylate Synthase; Chain A
Homologous superfamily homologous superfamily	10 — Thymidylate synthase/dCMP hydroxymethylase domain

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Unit-cell length a length_a	56.343 Å
Unit-cell length b length_b	154.999 Å
Unit-cell length c length_c	164.001 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	8

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.300 Å
Low-resolution limit resolution_low	23.830 Å
R factor r_factor	0.2000
R_work r_work	0.1980
R_free r_free	0.2310

Double mutant (C59R+S108N) Plasmodium falciparum dihydrofolate reductase-thymidylate synthase (PfDHFR-TS) complexed with pyrimethamine, NADPH, and dUMP

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

Bifunctional dihydrofolate reductase-thymidylate synthase

State in the Current Structure

Other States of the Same Protein in the Database

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

1j3j__assembly_1__model_1

1j3j__assembly_1__model_1 | I(q)

1j3j__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Double mutant (C59R+S108N) Plasmodium falciparum dihydrofolate reductase-thymidylate synthase (PfDHFR-TS) complexed with pyrimethamine, NADPH, and dUMP

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

Bifunctional dihydrofolate reductase-thymidylate synthase

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

1j3j__assembly_1__model_1

1j3j__assembly_1__model_1 | I(q)

1j3j__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)