2xta

Crystal structure of the SucA domain of Mycobacterium smegmatis alpha- ketoglutarate decarboxylase in complex with acetyl-CoA (triclinic form)

Method: X-RAY DIFFRACTION

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

2-OXOGLUTARATE DECARBOXYLASE

MYCOBACTERIUM SMEGMATIS

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	THIAMINE DIPHOSPHATE × 2 MAGNESIUM ION × 2 CALCIUM ION × 2 ACETYL COENZYME *A × 1 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	THIAMINE DIPHOSPHATE × 2 MAGNESIUM ION × 2 CALCIUM ION × 2 ACETYL COENZYME *A × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	KGD_MYCS2
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–868； UniProt 361–1227 Author chain B； PDBConstruct 2–868； UniProt 361–1227 Author chain C； PDBConstruct 2–868； UniProt 361–1227 Author chain D； PDBConstruct 2–868； UniProt 361–1227

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	2xta
Deposition date deposition_date	2010-10-05
Structure title title	Crystal structure of the SucA domain of Mycobacterium smegmatis alpha- ketoglutarate decarboxylase in complex with acetyl-CoA (triclinic form)
Keywords keywords	LYASE, KDH, KGD; LYASE
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.

2xta__assembly_1__model_1

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

Download this curve (.dat)

2xta__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2xta__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	35.01 Å
Rg (electron density)	34.06 Å
Total Rg	34.61 Å
Atom count	12672
Residues	1640
Excluded volume	223340 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2xta__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2xta__assembly_2__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 (6)

Entity 1 Entity 1 polymer

Description description	2-OXOGLUTARATE DECARBOXYLASE
Molecular weight formula_weight	97166.6 kDa
EC 编号 ec_number	4.1.1.71
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	26097

GDSIEDKNARVIELIAAYRNRGHLMADIDPLRLDNTRFRSHPDLDVNSHGLTLWDLDREFKVDGFAGVQRKKLRDILSVLRDAYCRHVGVEYTHILEPEQQRWIQERVETKHDKPTVAEQKYILSKLNAAEAFETFLQTKYVGQKRFSLEGAETVIPMMDAVIDQCAEHGLDEVVIAMPHRGRLNVLANIVGKPYSQIFSEFEGNLNPSQAHGSGDVKYHLGATGTYIQMFGDNDIEVSLTANPSHLEAVDPVLEGLVRAKQDLLDTGEEGSDNRFSVVPLMLHGDAAFAGQGVVAETLNLALLRGYRTGGTIHIVVNNQIGFTTAPTDSRSSEYCTDVAKMIGAPIFHVNGDDPEACAWVARLAVDFRQAFKKDVVIDMLCYRRRGHNEGDDPSMTQPYMYDVIDTKRGSRKAYTEALIGRGDISMKEAEDALRDYQGQLERVFNEVRELEKHEIEPSESVEADQQIPSKLATAVDKAMLQRIGDAHLALPEGFTVHPRVRPVLEKRREMAYEGRIDWAFAELLALGSLIAEGKLVRLSGQDTQRGTFTQRHAVIVDRKTGEEFTPLQLLATNPDGTPTGGKFLVYNSALSEFAAVGFEYGYSVGNPDAMVLWEAQFGDFVNGAQSIIDEFISSGEAKWGQLSDVVLLLPHGHEGQGPDHTSGRIERFLQLWAEGSMTIAMPSTPANYFHLLRRHGKDGIQRPLIVFTPKSMLRNKAAVSDIRDFTESKFRSVLEEPMYTDGEGDRNKVTRLLLTSGKIYYELAARKAKENREDVAIVRIEQLAPLPRRRLAETLDRYPNVKEKFWVQEEPANQGAWPSFGLTLPEILPDHFTGLKRISRRAMSAPSSGSSKVHAVEQQEILDTAFG

Source Source

Source organism organism	MYCOBACTERIUM SMEGMATIS
NCBI taxonomy ID ncbi_taxonomy_id	246196
Host organism host_organism	ESCHERICHIA COLI

Entity 2 Entity 2 non-polymer

Description description	THIAMINE DIPHOSPHATE
Molecular weight formula_weight	425.3 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 3 Entity 3 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 4 Entity 4 non-polymer

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 5 Entity 5 non-polymer

Description description	ACETYL COENZYME *A
Molecular weight formula_weight	809.6 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	742

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6. Fold Classification (SCOP + CATH) 16 domains

CATH v4.4 (16 domains)

Domain ID domain_id	2xtaA01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	1150 — TPP helical domain

Domain ID domain_id	2xtaA02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	970 — Thiamin diphosphate (ThDP)-binding fold, Pyr/PP domains

Domain ID domain_id	2xtaA03
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	12470 —

Domain ID domain_id	2xtaA04
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	11610 — Multifunctional 2-oxoglutarate metabolism enzyme, C-terminal domain

Domain ID domain_id	2xtaB01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	1150 — TPP helical domain

Domain ID domain_id	2xtaB02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	970 — Thiamin diphosphate (ThDP)-binding fold, Pyr/PP domains

Domain ID domain_id	2xtaB03
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	12470 —

Domain ID domain_id	2xtaB04
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	11610 — Multifunctional 2-oxoglutarate metabolism enzyme, C-terminal domain

Domain ID domain_id	2xtaC01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	1150 — TPP helical domain

Domain ID domain_id	2xtaC02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	970 — Thiamin diphosphate (ThDP)-binding fold, Pyr/PP domains

Domain ID domain_id	2xtaC03
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	12470 —

Domain ID domain_id	2xtaC04
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	11610 — Multifunctional 2-oxoglutarate metabolism enzyme, C-terminal domain

Domain ID domain_id	2xtaD01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	287 — Helix Hairpins
Homologous superfamily homologous superfamily	1150 — TPP helical domain

Domain ID domain_id	2xtaD02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	970 — Thiamin diphosphate (ThDP)-binding fold, Pyr/PP domains

Domain ID domain_id	2xtaD03
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	12470 —

Domain ID domain_id	2xtaD04
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	11610 — Multifunctional 2-oxoglutarate metabolism enzyme, C-terminal domain

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Unit-cell length a length_a	80.550 Å
Unit-cell length b length_b	83.580 Å
Unit-cell length c length_c	160.070 Å
Unit-cell angle α angle_alpha	99.59 °
Unit-cell angle β angle_beta	98.94 °
Unit-cell angle γ angle_gamma	100.68 °
Molecules per unit cell Z z_pdb	4

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

Resolution resolution	2.200 Å
Low-resolution limit resolution_low	78.110 Å
R factor r_factor	0.1892
R_work r_work	0.1880
R_free r_free	0.2136

Crystal structure of the SucA domain of Mycobacterium smegmatis alpha- ketoglutarate decarboxylase in complex with acetyl-CoA (triclinic form)

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

2-OXOGLUTARATE DECARBOXYLASE

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

2xta__assembly_1__model_1

2xta__assembly_1__model_1 | I(q)

2xta__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 (6)

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 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 16 domains

CATH v4.4 (16 domains)

7. Citations (1)

Crystal structure of the SucA domain of Mycobacterium smegmatis alpha- ketoglutarate decarboxylase in complex with acetyl-CoA (triclinic form)

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

2-OXOGLUTARATE DECARBOXYLASE

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

2xta__assembly_1__model_1

2xta__assembly_1__model_1 | I(q)

2xta__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 (6)

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 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 16 domains

CATH v4.4 (16 domains)

7. Citations (1)