SAXSdb — 1huu

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

PROTEIN HU

OrganismNot specified

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
2	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count
3	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count
4	Protein homooligomer	Homooligomer	Protein 2	water × 2	Consistent with protein count
5	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	DBH_BACST
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–90； UniProt 1–90 Author chain B； PDBConstruct 1–90； UniProt 1–90 Author chain C； PDBConstruct 1–90； UniProt 1–90

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	1huu
Deposition date deposition_date	1998-07-06
Structure title title	DNA-BINDING PROTEIN HU FROM BACILLUS STEAROTHERMOPHILUS
Keywords keywords	DNA-BINDING PROTEIN, DNA SUPERCOILING, ALPHA/BETA CLASS, MINOR GROOVE BINDER, DNA BINDING PROTEIN; DNA BINDING PROTEIN
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.

1huu__assembly_1__model_1

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

Download this curve (.dat)

1huu__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1huu__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	18.17 Å
Rg (electron density)	16.96 Å
Total Rg	18.17 Å
Atom count	1208
Residues	160
Excluded volume	21801 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1huu__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1huu__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1huu__assembly_3__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`1huu__assembly_4__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
5	1	`1huu__assembly_5__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) 6 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d1huua_
Class class	a — All alpha proteins
Fold Fold fold	a.55 — IHF-like DNA-binding proteins
Superfamily Superfamily superfamily	a.55.1 — IHF-like DNA-binding proteins
Family Family family	a.55.1.1 — Prokaryotic DNA-bending protein

Domain ID domain_id	d1huub_
Class class	a — All alpha proteins
Fold Fold fold	a.55 — IHF-like DNA-binding proteins
Superfamily Superfamily superfamily	a.55.1 — IHF-like DNA-binding proteins
Family Family family	a.55.1.1 — Prokaryotic DNA-bending protein

Domain ID domain_id	d1huuc_
Class class	a — All alpha proteins
Fold Fold fold	a.55 — IHF-like DNA-binding proteins
Superfamily Superfamily superfamily	a.55.1 — IHF-like DNA-binding proteins
Family Family family	a.55.1.1 — Prokaryotic DNA-bending protein

CATH v4.4 (3 domains)

Domain ID domain_id	1huuA00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	520 — HU Protein; Chain A
Homologous superfamily homologous superfamily	10 — IHF-like DNA-binding proteins

Domain ID domain_id	1huuB00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	520 — HU Protein; Chain A
Homologous superfamily homologous superfamily	10 — IHF-like DNA-binding proteins

Domain ID domain_id	1huuC00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	520 — HU Protein; Chain A
Homologous superfamily homologous superfamily	10 — IHF-like DNA-binding proteins

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Unit-cell length a length_a	65.500 Å
Unit-cell length b length_b	37.300 Å
Unit-cell length c length_c	65.500 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	114.50 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	6

Space group space_group	P 1 2 1
Space-group number int_tables_number	3
Crystal system crystal_system	—

Resolution resolution	2.000 Å
Low-resolution limit resolution_low	6.000 Å
R factor r_factor	0.1930
R_work r_work	0.1930
R_free r_free	0.2130

Description description	PROTEIN HU
Molecular weight formula_weight	9733.2 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	1971

DNA-BINDING PROTEIN HU FROM BACILLUS STEAROTHERMOPHILUS

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

PROTEIN HU

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

1huu__assembly_1__model_1

1huu__assembly_1__model_1 | I(q)

1huu__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

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (1)

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	271

DNA-BINDING PROTEIN HU FROM BACILLUS STEAROTHERMOPHILUS

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

PROTEIN HU

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

1huu__assembly_1__model_1

1huu__assembly_1__model_1 | I(q)

1huu__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

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (1)