2h12

Structure of Acetobacter aceti citrate synthase complexed with oxaloacetate and carboxymethyldethia coenzyme A (CMX)

Method: X-RAY DIFFRACTION

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

Citrate synthase

Acetobacter aceti

UniProt P20901

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 6	OXALOACETATE ION × 6 SULFATE ION × 41 CARBOXYMETHYLDETHIA COENZYME *A × 6 water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CISY_ACEAC
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–436； UniProt 1–436 Author chain B； PDBConstruct 1–436； UniProt 1–436 Author chain C； PDBConstruct 1–436； UniProt 1–436 Author chain D； PDBConstruct 1–436； UniProt 1–436 Author chain E； PDBConstruct 1–436； UniProt 1–436 Author chain F； PDBConstruct 1–436； UniProt 1–436

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	2h12
Deposition date deposition_date	2006-05-15
Structure title title	Structure of Acetobacter aceti citrate synthase complexed with oxaloacetate and carboxymethyldethia coenzyme A (CMX)
Keywords keywords	acidophile, citrate synthase, acetic acid resistance, allostery, Transferase; TRANSFERASE
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.

2h12__assembly_1__model_1

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

Download this curve (.dat)

2h12__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2h12__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	42.94 Å
Rg (electron density)	42.33 Å
Total Rg	42.75 Å
Atom count	20292
Residues	2533
Excluded volume	360920 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2h12__assembly_1__model_1`	hexameric （6）	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 (5)

Entity 1 Entity 1 polymer

Description description	Citrate synthase
Molecular weight formula_weight	48179.3 kDa
EC 编号 ec_number	2.3.3.1
Source method src_method	man
Copy count entity_count	6

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F
Atom count atom_count	23521

MSASQKEGKLSTATISVDGKSAEMPVLSGTLGPDVIDIRKLPAQLGVFTFDPGYGETAACNSKITFIDGDKGVLLHRGYPIAQLAENASYEEVIYLLLNGELPNKAQYDTFTNTLTNHTLLHEQIRNFFNGFRRDAHPMAILCGTVGALSAFYPDANDIAIPANRDLAAMRLIAKIPTIAAWAYKYTQGEAFIYPRNDLNYAENFLSMMFARMSEPYKVNPVLARAMNRILILHADHEQNASTSTVRLAGSTGANPFACIAAGIAALWGPAHGGANEAVLKMLARIGKKENIPAFIAQVKDKNSGVKLMGFGHRVYKNFDPRAKIMQQTCHEVLTELGIKDDPLLDLAVELEKIALSDDYFVQRKLYPNVDFYSGIILKAMGIPTSMFTVLFAVARTTGWVSQWKEMIEEPGQRISRPRQLYIGAPQRDYVPLAKR

Source Source

Source organism organism	Acetobacter aceti
NCBI taxonomy ID ncbi_taxonomy_id	435
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	OXALOACETATE ION
Molecular weight formula_weight	131.1 kDa
Source method src_method	syn
Copy count entity_count	6

Entity 3 Entity 3 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	41

Entity 4 Entity 4 non-polymer

Description description	CARBOXYMETHYLDETHIA COENZYME *A
Molecular weight formula_weight	793.5 kDa
Source method src_method	syn
Copy count entity_count	6

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	3229

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6. Fold Classification (SCOP + CATH) 24 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d2h12a_
Class class	a — All alpha proteins
Fold Fold fold	a.103 — Citrate synthase
Superfamily Superfamily superfamily	a.103.1 — Citrate synthase
Family Family family	a.103.1.1 — Citrate synthase

Domain ID domain_id	d2h12b_
Class class	a — All alpha proteins
Fold Fold fold	a.103 — Citrate synthase
Superfamily Superfamily superfamily	a.103.1 — Citrate synthase
Family Family family	a.103.1.1 — Citrate synthase

Domain ID domain_id	d2h12c_
Class class	a — All alpha proteins
Fold Fold fold	a.103 — Citrate synthase
Superfamily Superfamily superfamily	a.103.1 — Citrate synthase
Family Family family	a.103.1.1 — Citrate synthase

Domain ID domain_id	d2h12d_
Class class	a — All alpha proteins
Fold Fold fold	a.103 — Citrate synthase
Superfamily Superfamily superfamily	a.103.1 — Citrate synthase
Family Family family	a.103.1.1 — Citrate synthase

Domain ID domain_id	d2h12e_
Class class	a — All alpha proteins
Fold Fold fold	a.103 — Citrate synthase
Superfamily Superfamily superfamily	a.103.1 — Citrate synthase
Family Family family	a.103.1.1 — Citrate synthase

Domain ID domain_id	d2h12f_
Class class	a — All alpha proteins
Fold Fold fold	a.103 — Citrate synthase
Superfamily Superfamily superfamily	a.103.1 — Citrate synthase
Family Family family	a.103.1.1 — Citrate synthase

CATH v4.4 (18 domains)

Domain ID domain_id	2h12A01
Class class	2 — Mainly Beta
Architecture architecture	20 — Single Sheet
Topology topology	28 — Rubrerythrin, domain 2
Homologous superfamily homologous superfamily	60 —

Domain ID domain_id	2h12A02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	580 — Citrate Synthase; domain 1
Homologous superfamily homologous superfamily	10 — Citrate Synthase, domain 1

Domain ID domain_id	2h12A03
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	230 — Cytochrome p450-Terp; domain 2
Homologous superfamily homologous superfamily	10 — Cytochrome P450-Terp, domain 2

Domain ID domain_id	2h12B01
Class class	2 — Mainly Beta
Architecture architecture	20 — Single Sheet
Topology topology	28 — Rubrerythrin, domain 2
Homologous superfamily homologous superfamily	60 —

Domain ID domain_id	2h12B02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	580 — Citrate Synthase; domain 1
Homologous superfamily homologous superfamily	10 — Citrate Synthase, domain 1

Domain ID domain_id	2h12B03
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	230 — Cytochrome p450-Terp; domain 2
Homologous superfamily homologous superfamily	10 — Cytochrome P450-Terp, domain 2

Domain ID domain_id	2h12C01
Class class	2 — Mainly Beta
Architecture architecture	20 — Single Sheet
Topology topology	28 — Rubrerythrin, domain 2
Homologous superfamily homologous superfamily	60 —

Domain ID domain_id	2h12C02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	580 — Citrate Synthase; domain 1
Homologous superfamily homologous superfamily	10 — Citrate Synthase, domain 1

Domain ID domain_id	2h12C03
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	230 — Cytochrome p450-Terp; domain 2
Homologous superfamily homologous superfamily	10 — Cytochrome P450-Terp, domain 2

Domain ID domain_id	2h12D01
Class class	2 — Mainly Beta
Architecture architecture	20 — Single Sheet
Topology topology	28 — Rubrerythrin, domain 2
Homologous superfamily homologous superfamily	60 —

Domain ID domain_id	2h12D02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	580 — Citrate Synthase; domain 1
Homologous superfamily homologous superfamily	10 — Citrate Synthase, domain 1

Domain ID domain_id	2h12D03
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	230 — Cytochrome p450-Terp; domain 2
Homologous superfamily homologous superfamily	10 — Cytochrome P450-Terp, domain 2

Domain ID domain_id	2h12E01
Class class	2 — Mainly Beta
Architecture architecture	20 — Single Sheet
Topology topology	28 — Rubrerythrin, domain 2
Homologous superfamily homologous superfamily	60 —

Domain ID domain_id	2h12E02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	580 — Citrate Synthase; domain 1
Homologous superfamily homologous superfamily	10 — Citrate Synthase, domain 1

Domain ID domain_id	2h12E03
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	230 — Cytochrome p450-Terp; domain 2
Homologous superfamily homologous superfamily	10 — Cytochrome P450-Terp, domain 2

Domain ID domain_id	2h12F01
Class class	2 — Mainly Beta
Architecture architecture	20 — Single Sheet
Topology topology	28 — Rubrerythrin, domain 2
Homologous superfamily homologous superfamily	60 —

Domain ID domain_id	2h12F02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	580 — Citrate Synthase; domain 1
Homologous superfamily homologous superfamily	10 — Citrate Synthase, domain 1

Domain ID domain_id	2h12F03
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	230 — Cytochrome p450-Terp; domain 2
Homologous superfamily homologous superfamily	10 — Cytochrome P450-Terp, domain 2

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Unit-cell length a length_a	170.660 Å
Unit-cell length b length_b	125.690 Å
Unit-cell length c length_c	150.590 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	24

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	1.850 Å
Low-resolution limit resolution_low	39.280 Å
R factor r_factor	0.1950
R_work r_work	0.1950
R_free r_free	0.2310

Structure of Acetobacter aceti citrate synthase complexed with oxaloacetate and carboxymethyldethia coenzyme A (CMX)

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

Citrate synthase

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

2h12__assembly_1__model_1

2h12__assembly_1__model_1 | I(q)

2h12__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 24 domains

SCOP 2.08 (6 domains)

CATH v4.4 (18 domains)

7. Citations (1)

Structure of Acetobacter aceti citrate synthase complexed with oxaloacetate and carboxymethyldethia coenzyme A (CMX)

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

Citrate synthase

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

2h12__assembly_1__model_1

2h12__assembly_1__model_1 | I(q)

2h12__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 24 domains

SCOP 2.08 (6 domains)

CATH v4.4 (18 domains)

7. Citations (1)