SAXSdb — 2iu5

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

HTH-TYPE DHAKLM OPERON TRANSCRIPTIONAL ACTIVATOR DHAS

LACTOCOCCUS LACTIS SUBSP. LACTIS IL1403

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	DHAS_LACLA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–187； UniProt 1–187 Author chain B； PDBConstruct 1–187； UniProt 1–187

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.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	2iu5
Deposition date deposition_date	2006-05-27
Structure title title	Dihydroxyacetone kinase operon activator DhaS
Keywords keywords	TRANSCRIPTION, SYNTHASE, ACTIVATOR, TETR FAMILY; TRANSCRIPTION
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.

2iu5__assembly_1__model_1

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

Download this curve (.dat)

2iu5__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2iu5__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	25.53 Å
Rg (electron density)	24.59 Å
Total Rg	25.43 Å
Atom count	3034
Residues	358
Excluded volume	54346 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2iu5__assembly_1__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 (2)

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6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (5 domains)

Domain ID domain_id	d2iu5a1
Class class	a — All alpha proteins
Fold Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamily	a.4.1 — Homeodomain-like
Family Family family	a.4.1.9 — Tetracyclin repressor-like, N-terminal domain

Domain ID domain_id	d2iu5a2
Class class	a — All alpha proteins
Fold Fold fold	a.121 — Tetracyclin repressor-like, C-terminal domain
Superfamily Superfamily superfamily	a.121.1 — Tetracyclin repressor-like, C-terminal domain
Family Family family	a.121.1.1 — Tetracyclin repressor-like, C-terminal domain

Domain ID domain_id	d2iu5b1
Class class	a — All alpha proteins
Fold Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamily	a.4.1 — Homeodomain-like
Family Family family	a.4.1.9 — Tetracyclin repressor-like, N-terminal domain

Domain ID domain_id	d2iu5b2
Class class	a — All alpha proteins
Fold Fold fold	a.121 — Tetracyclin repressor-like, C-terminal domain
Superfamily Superfamily superfamily	a.121.1 — Tetracyclin repressor-like, C-terminal domain
Family Family family	a.121.1.1 — Tetracyclin repressor-like, C-terminal domain

Domain ID domain_id	d2iu5b3
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

CATH v4.4 (2 domains)

Domain ID domain_id	2iu5A00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	357 — Tetracycline Repressor; domain 2
Homologous superfamily homologous superfamily	10 — Tetracycline Repressor, domain 2

Domain ID domain_id	2iu5B00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	357 — Tetracycline Repressor; domain 2
Homologous superfamily homologous superfamily	10 — Tetracycline Repressor, domain 2

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Unit-cell length a length_a	44.459 Å
Unit-cell length b length_b	46.284 Å
Unit-cell length c length_c	171.939 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	1.600 Å
Low-resolution limit resolution_low	40.000 Å
R factor r_factor	0.1970
R_work r_work	0.1950
R_free r_free	0.2300

Description description	HTH-TYPE DHAKLM OPERON TRANSCRIPTIONAL ACTIVATOR DHAS
Molecular weight formula_weight	23574.8 kDa
Mutation mutation	YES
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	3328

Dihydroxyacetone kinase operon activator DhaS

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

HTH-TYPE DHAKLM OPERON TRANSCRIPTIONAL ACTIVATOR DHAS

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

2iu5__assembly_1__model_1

2iu5__assembly_1__model_1 | I(q)

2iu5__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (5 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	LACTOCOCCUS LACTIS SUBSP. LACTIS IL1403
NCBI taxonomy ID ncbi_taxonomy_id	272623
Host organism host_organism	ESCHERICHIA COLI

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	294

Dihydroxyacetone kinase operon activator DhaS

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

HTH-TYPE DHAKLM OPERON TRANSCRIPTIONAL ACTIVATOR DHAS

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

2iu5__assembly_1__model_1

2iu5__assembly_1__model_1 | I(q)

2iu5__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (5 domains)

CATH v4.4 (2 domains)

7. Citations (1)