SAXSdb — 1twz

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

DHPS, Dihydropteroate synthase

Bacillus anthracis

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	SULFATE ION × 8 PTERIN-6-YL-METHYL-MONOPHOSPHATE × 2 water × 2	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	SULFATE ION × 4 PTERIN-6-YL-METHYL-MONOPHOSPHATE × 1 water × 1	Consistent with protein count
3	Protein homooligomer	Homooligomer	Protein 2	SULFATE ION × 8 PTERIN-6-YL-METHYL-MONOPHOSPHATE × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q81VW8_BACAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 21–297； UniProt 1–277 Author chain B； PDBConstruct 21–297； UniProt 1–277

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	1twz
Deposition date deposition_date	2004-07-01
Structure title title	Dihydropteroate Synthetase, With Bound Substrate Analogue PtP, From Bacillus anthracis
Keywords keywords	anthracis, folate biosynthesis, dihydropteroate, pterine, Transferase; 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.

1twz__assembly_1__model_1

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

Download this curve (.dat)

1twz__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1twz__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	26.89 Å
Rg (electron density)	26.37 Å
Total Rg	26.80 Å
Atom count	4200
Residues	532
Excluded volume	74530 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1twz__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1twz__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1twz__assembly_3__model_1`	dimeric （2）	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 (4)

Entity 1 Entity 1 polymer

Description description	DHPS, Dihydropteroate synthase
Molecular weight formula_weight	32883.7 kDa
EC 编号 ec_number	2.5.1.15
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	4303

MGSSHHHHHHSSGLVPRGSHMKWDYDLRCGEYTLNLNEKTLIMGILNVTPDSFSDGGSYNEVDAAVRHAKEMRDEGAHIIDIGGESTRPGFAKVSVEEEIKRVVPMIQAVSKEVKLPISIDTYKAEVAKQAIEAGAHIINDIWGAKAEPKIAEVAAHYDVPIILMHNRDNMNYRNLMADMIADLYDSIKIAKDAGVRDENIILDPGIGFAKTPEQNLEAMRNLEQLNVLGYPVLLGTSRKSFIGHVLDLPVEERLEGTGATVCLGIEKGCEFVRVHDVKEMSRMAKMMDAMIGKGVK

Source Source

Source organism organism	Bacillus anthracis
NCBI taxonomy ID ncbi_taxonomy_id	191218
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	8

Entity 3 Entity 3 non-polymer

Description description	PTERIN-6-YL-METHYL-MONOPHOSPHATE
Molecular weight formula_weight	273.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	134

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1twza_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.21 — Dihydropteroate synthetase-like
Family Family family	c.1.21.1 — Dihydropteroate synthetase

Domain ID domain_id	d1twzb_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamily	c.1.21 — Dihydropteroate synthetase-like
Family Family family	c.1.21.1 — Dihydropteroate synthetase

CATH v4.4 (2 domains)

Domain ID domain_id	1twzA00
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	20 — Dihydropteroate synthase-like

Domain ID domain_id	1twzB00
Class class	3 — Alpha Beta
Architecture architecture	20 — Alpha-Beta Barrel
Topology topology	20 — TIM Barrel
Homologous superfamily homologous superfamily	20 — Dihydropteroate synthase-like

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Unit-cell length a length_a	97.362 Å
Unit-cell length b length_b	97.362 Å
Unit-cell length c length_c	262.865 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	24

Space group space_group	P 62 2 2
Space-group number int_tables_number	180
Crystal system crystal_system	—

Resolution resolution	2.750 Å
Low-resolution limit resolution_low	50.000 Å
R factor r_factor	0.2287
R_work r_work	0.2260
R_free r_free	0.2785

Dihydropteroate Synthetase, With Bound Substrate Analogue PtP, From Bacillus anthracis

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

DHPS, Dihydropteroate 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

1twz__assembly_1__model_1

1twz__assembly_1__model_1 | I(q)

1twz__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Dihydropteroate Synthetase, With Bound Substrate Analogue PtP, From Bacillus anthracis

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

DHPS, Dihydropteroate 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

1twz__assembly_1__model_1

1twz__assembly_1__model_1 | I(q)

1twz__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)