SAXSdb — 1y9b

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

conserved hypothetical protein

Vibrio cholerae O1 biovar eltor

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 homooligomer	Homooligomer	Protein 4	water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9K2J6_VIBCH
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

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	1y9b
Deposition date deposition_date	2004-12-15
Structure title title	Structure of Conserved Putative Transcriptional Factor from Vibrio cholerae O1 biovar eltor str. N16961
Keywords keywords	;MCSG, structural genomics, Vibrio cholerae, conserved hypothetical protein, PSI, Protein Structure Initiative, Midwest Center for Structural Genomics, UNKNOWN FUNCTION ;; STRUCTURAL GENOMICS, UNKNOWN FUNCTION
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.

1y9b__assembly_1__model_1

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

Download this curve (.dat)

1y9b__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1y9b__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	25.83 Å
Rg (electron density)	25.70 Å
Total Rg	26.17 Å
Atom count	1178
Residues	155
Excluded volume	21372 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1y9b__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1y9b__assembly_2__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 (2)

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6. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1y9ba1
Class class	a — All alpha proteins
Fold Fold fold	a.43 — Ribbon-helix-helix
Superfamily Superfamily superfamily	a.43.1 — Ribbon-helix-helix
Family Family family	a.43.1.9 — VCA0319-like

Domain ID domain_id	d1y9bb_
Class class	a — All alpha proteins
Fold Fold fold	a.43 — Ribbon-helix-helix
Superfamily Superfamily superfamily	a.43.1 — Ribbon-helix-helix
Family Family family	a.43.1.9 — VCA0319-like

CATH v4.4 (3 domains)

Domain ID domain_id	1y9bA00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	780 — Single helix bin

Domain ID domain_id	1y9bB01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1220 — Arc Repressor Mutant
Homologous superfamily homologous superfamily	10 — Met repressor-like

Domain ID domain_id	1y9bB02
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	890 — cAMP-dependent Protein Kinase, Chain A
Homologous superfamily homologous superfamily	30 — VCA0319-like

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Unit-cell length a length_a	66.220 Å
Unit-cell length b length_b	72.732 Å
Unit-cell length c length_c	48.469 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 2
Space-group number int_tables_number	18
Crystal system crystal_system	—

Resolution resolution	2.200 Å
Low-resolution limit resolution_low	48.970 Å
R factor r_factor	0.2275
R_work r_work	0.2245
R_free r_free	0.2860

Description description	conserved hypothetical protein
Molecular weight formula_weight	9788.0 kDa
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	1307

Structure of Conserved Putative Transcriptional Factor from Vibrio cholerae O1 biovar eltor str. N16961

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

conserved hypothetical protein

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

1y9b__assembly_1__model_1

1y9b__assembly_1__model_1 | I(q)

1y9b__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) 5 domains

SCOP 2.08 (2 domains)

CATH v4.4 (3 domains)

7. Citations (1)

Source organism organism	Vibrio cholerae O1 biovar eltor
NCBI taxonomy ID ncbi_taxonomy_id	243277
Host organism host_organism	Escherichia coli BL21(DE3)

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	123

Structure of Conserved Putative Transcriptional Factor from Vibrio cholerae O1 biovar eltor str. N16961

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

conserved hypothetical protein

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

1y9b__assembly_1__model_1

1y9b__assembly_1__model_1 | I(q)

1y9b__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) 5 domains

SCOP 2.08 (2 domains)

CATH v4.4 (3 domains)

7. Citations (1)