2p9j

Crystal structure of AQ2171 from Aquifex aeolicus

Method: X-RAY DIFFRACTION

▼

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

Hypothetical protein AQ2171

Aquifex aeolicus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 8	water × 8	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	O67920_AQUAE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–162； UniProt 2–163 Author chain B； PDBConstruct 1–162； UniProt 2–163 Author chain C； PDBConstruct 1–162； UniProt 2–163 Author chain D； PDBConstruct 1–162； UniProt 2–163 Author chain E； PDBConstruct 1–162； UniProt 2–163 Author chain F； PDBConstruct 1–162； UniProt 2–163 Author chain G； PDBConstruct 1–162； UniProt 2–163 Author chain H； PDBConstruct 1–162； UniProt 2–163

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.

▼

2. Structure Basics 2. Structure Basics

Entry ID entry_id	2p9j
Deposition date deposition_date	2007-03-26
Structure title title	Crystal structure of AQ2171 from Aquifex aeolicus
Keywords keywords	;AQ2171, SECSG, RIKEN, PSI, Aquifex aeolicus, Structural Genomics, Protein Structure Initiative, Southeast Collaboratory for Structural Genomics, RIKEN Structural Genomics/Proteomics Initiative, RSGI, UNKNOWN FUNCTION ;; STRUCTURAL GENOMICS, UNKNOWN FUNCTION
Experimental Method method	X-RAY DIFFRACTION

▼

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.

2p9j__assembly_1__model_1

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

Download this curve (.dat)

2p9j__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2p9j__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	31.43 Å
Rg (electron density)	30.60 Å
Total Rg	31.47 Å
Atom count	9828
Residues	1228
Excluded volume	179860 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2p9j__assembly_1__model_1`	octameric （8）	Success	4.1.3-1-20251215 (887e7ef)	View Download

▶

4. Crystallography and Experiment 4. Crystallography & Experiment

▶

5. Entities and Polymers Entities & Polymers (2)

▼

6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d2p9ja_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.108 — HAD-like
Superfamily Superfamily superfamily	c.108.1 — HAD-like
Family Family family	c.108.1.0 — automated matches

Domain ID domain_id	d2p9jb_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.108 — HAD-like
Superfamily Superfamily superfamily	c.108.1 — HAD-like
Family Family family	c.108.1.0 — automated matches

Domain ID domain_id	d2p9jc_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.108 — HAD-like
Superfamily Superfamily superfamily	c.108.1 — HAD-like
Family Family family	c.108.1.0 — automated matches

Domain ID domain_id	d2p9jd_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.108 — HAD-like
Superfamily Superfamily superfamily	c.108.1 — HAD-like
Family Family family	c.108.1.0 — automated matches

Domain ID domain_id	d2p9je_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.108 — HAD-like
Superfamily Superfamily superfamily	c.108.1 — HAD-like
Family Family family	c.108.1.0 — automated matches

Domain ID domain_id	d2p9jf_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.108 — HAD-like
Superfamily Superfamily superfamily	c.108.1 — HAD-like
Family Family family	c.108.1.0 — automated matches

Domain ID domain_id	d2p9jg_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.108 — HAD-like
Superfamily Superfamily superfamily	c.108.1 — HAD-like
Family Family family	c.108.1.0 — automated matches

Domain ID domain_id	d2p9jh_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.108 — HAD-like
Superfamily Superfamily superfamily	c.108.1 — HAD-like
Family Family family	c.108.1.0 — automated matches

CATH v4.4 (8 domains)

Domain ID domain_id	2p9jA00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1000 — HAD superfamily/HAD-like

Domain ID domain_id	2p9jB00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1000 — HAD superfamily/HAD-like

Domain ID domain_id	2p9jC00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1000 — HAD superfamily/HAD-like

Domain ID domain_id	2p9jD00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1000 — HAD superfamily/HAD-like

Domain ID domain_id	2p9jE00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1000 — HAD superfamily/HAD-like

Domain ID domain_id	2p9jF00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1000 — HAD superfamily/HAD-like

Domain ID domain_id	2p9jG00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1000 — HAD superfamily/HAD-like

Domain ID domain_id	2p9jH00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1000 — HAD superfamily/HAD-like

▶

Unit-cell length a length_a	121.325 Å
Unit-cell length b length_b	121.325 Å
Unit-cell length c length_c	86.897 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	32

Space group space_group	P 42
Space-group number int_tables_number	77
Crystal system crystal_system	—

Resolution resolution	2.400 Å
Low-resolution limit resolution_low	33.920 Å
R factor r_factor	0.2189
R_work r_work	0.2164
R_free r_free	0.2677

Description description	Hypothetical protein AQ2171
Molecular weight formula_weight	18394.0 kDa
Source method src_method	man
Copy count entity_count	8

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F,G,H
Atom count atom_count	10046

Crystal structure of AQ2171 from Aquifex aeolicus

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

Hypothetical protein AQ2171

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

2p9j__assembly_1__model_1

2p9j__assembly_1__model_1 | I(q)

2p9j__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) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

7. Citations (1)

Source organism organism	Aquifex aeolicus
NCBI taxonomy ID ncbi_taxonomy_id	224324
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	218

Crystal structure of AQ2171 from Aquifex aeolicus

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

Hypothetical protein AQ2171

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

2p9j__assembly_1__model_1

2p9j__assembly_1__model_1 | I(q)

2p9j__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) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

7. Citations (1)