2ao9

Structural Genomics, The crystal structure of a Phage protein (phBC6A51) from Bacillus cereus ATCC 14579

Method: X-RAY DIFFRACTION

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

Phage protein

Bacillus cereus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 18	water × 18	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 9	water × 9	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q81ES4_BACCR
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–155； UniProt 1–155 Author chain B； PDBConstruct 1–155； UniProt 1–155 Author chain C； PDBConstruct 1–155； UniProt 1–155 Author chain D； PDBConstruct 1–155； UniProt 1–155 Author chain E； PDBConstruct 1–155； UniProt 1–155 Author chain F； PDBConstruct 1–155； UniProt 1–155 Author chain G； PDBConstruct 1–155； UniProt 1–155 Author chain H； PDBConstruct 1–155； UniProt 1–155 Author chain I； PDBConstruct 1–155； UniProt 1–155

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	2ao9
Deposition date deposition_date	2005-08-12
Structure title title	Structural Genomics, The crystal structure of a Phage protein (phBC6A51) from Bacillus cereus ATCC 14579
Keywords keywords	;Structural genomics, nine-fold NCS., PSI, Protein Structure Initiative, Midwest Center for Structural Genomics, MCSG, 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.

2ao9__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2ao9__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2ao9__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	34.89 Å
Rg (electron density)	33.89 Å
Total Rg	34.31 Å
Atom count	8172
Residues	999
Excluded volume	147280 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2ao9__assembly_1__model_1`	octadecameric （18）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2ao9__assembly_2__model_1`	nonameric （9）	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) 18 domains

SCOP 2.08 (9 domains)

Domain ID domain_id	d2ao9a1
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.4.1.17 — Nanomeric phage protein-like

Domain ID domain_id	d2ao9b_
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.4.1.17 — Nanomeric phage protein-like

Domain ID domain_id	d2ao9c_
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.4.1.17 — Nanomeric phage protein-like

Domain ID domain_id	d2ao9d_
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.4.1.17 — Nanomeric phage protein-like

Domain ID domain_id	d2ao9e_
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.4.1.17 — Nanomeric phage protein-like

Domain ID domain_id	d2ao9f_
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.4.1.17 — Nanomeric phage protein-like

Domain ID domain_id	d2ao9g_
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.4.1.17 — Nanomeric phage protein-like

Domain ID domain_id	d2ao9h_
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.4.1.17 — Nanomeric phage protein-like

Domain ID domain_id	d2ao9i_
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.4.1.17 — Nanomeric phage protein-like

CATH v4.4 (9 domains)

Domain ID domain_id	2ao9A01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	60 — Homeodomain-like

Domain ID domain_id	2ao9B01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	60 — Homeodomain-like

Domain ID domain_id	2ao9C01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	60 — Homeodomain-like

Domain ID domain_id	2ao9D01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	60 — Homeodomain-like

Domain ID domain_id	2ao9E01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	60 — Homeodomain-like

Domain ID domain_id	2ao9F01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	60 — Homeodomain-like

Domain ID domain_id	2ao9G01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	60 — Homeodomain-like

Domain ID domain_id	2ao9H01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	60 — Homeodomain-like

Domain ID domain_id	2ao9I01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	60 — Homeodomain-like

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Unit-cell length a length_a	114.016 Å
Unit-cell length b length_b	150.481 Å
Unit-cell length c length_c	99.975 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	36

Space group space_group	P 21 21 2
Space-group number int_tables_number	18
Crystal system crystal_system	—

Resolution resolution	1.900 Å
Low-resolution limit resolution_low	39.100 Å
R factor r_factor	0.2065
R_work r_work	0.2049
R_free r_free	0.2358

Description description	Phage protein
Molecular weight formula_weight	17871.5 kDa
Source method src_method	man
Copy count entity_count	9

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F,G,H,I
Atom count atom_count	9143

Structural Genomics, The crystal structure of a Phage protein (phBC6A51) from Bacillus cereus ATCC 14579

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

Phage 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

2ao9__assembly_2__model_1

2ao9__assembly_2__model_1 | I(q)

2ao9__assembly_2__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) 18 domains

SCOP 2.08 (9 domains)

CATH v4.4 (9 domains)

7. Citations (1)

Source organism organism	Bacillus cereus
NCBI taxonomy ID ncbi_taxonomy_id	226900
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	971

Structural Genomics, The crystal structure of a Phage protein (phBC6A51) from Bacillus cereus ATCC 14579

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

Phage 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

2ao9__assembly_2__model_1

2ao9__assembly_2__model_1 | I(q)

2ao9__assembly_2__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) 18 domains

SCOP 2.08 (9 domains)

CATH v4.4 (9 domains)

7. Citations (1)