1ozf

The crystal structure of Klebsiella pneumoniae acetolactate synthase with enzyme-bound cofactors

Method: X-RAY DIFFRACTION

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

Acetolactate synthase, catabolic

Klebsiella pneumoniae

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	PHOSPHATE ION × 4 MAGNESIUM ION × 4 THIAMINE DIPHOSPHATE × 4 DI(HYDROXYETHYL)ETHER × 18 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ILVB_KLEPN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–566； UniProt 1–559 Author chain B； PDBConstruct 1–566； UniProt 1–559

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	1ozf
Deposition date deposition_date	2003-04-09
Structure title title	The crystal structure of Klebsiella pneumoniae acetolactate synthase with enzyme-bound cofactors
Keywords keywords	acetolactate synthase, acetohydroxyacid synthase, thiamin diphosphate, LYASE; 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.

1ozf__assembly_1__model_1

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

Download this curve (.dat)

1ozf__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1ozf__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	38.70 Å
Rg (electron density)	37.81 Å
Total Rg	38.21 Å
Atom count	16662
Residues	2174
Excluded volume	296410 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1ozf__assembly_1__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 (6)

Entity 1 Entity 1 polymer

Description description	Acetolactate synthase, catabolic
Molecular weight formula_weight	61355.8 kDa
EC 编号 ec_number	4.1.3.18
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	8858

MDKQYPVRQWAHGADLVVSQLEAQGVRQVFGIPGAKIDKVFDSLLDSSIRIIPVRHEANAAFMAAAVGRITGKAGVALVTSGPGCSNLITGMATANSEGDPVVALGGAVKRADKAKQVHQSMDTVAMFSPVTKYAIEVTAPDALAEVVSNAFRAAEQGRPGSAFVSLPQDVVDGPVSGKVLPASGAPQMGAAPDDAIDQVAKLIAQAKNPIFLLGLMASQPENSKALRRLLETSHIPVTSTYQAAGAVNQDNFSRFAGRVGLFNNQAGDRLLQLADLVICIGYSPVEYEPAMWNSGNATLVHIDVLPAYEERNYTPDVELVGDIAGTLNKLAQNIDHRLVLSPQAAEILRDRQHQRELLDRRGAQLNQFALHPLRIVRAMQDIVNSDVTLTVDMGSFHIWIARYLYTFRARQVMISNGQQTMGVALPWAIGAWLVNPERKVVSVSGDGGFLQSSMELETAVRLKANVLHLIWVDNGYNMVAIQEEKKYQRLSGVEFGPMDFKAYAESFGAKGFAVESAEALEPTLRAAMDVDGPAVVAIPVDYRDNPLLMGQLHLSQILEHHHHHH

Source Source

Source organism organism	Klebsiella pneumoniae
NCBI taxonomy ID ncbi_taxonomy_id	573
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	PHOSPHATE ION
Molecular weight formula_weight	95.0 kDa
Source method src_method	syn
Copy count entity_count	2

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	2

Entity 4 Entity 4 non-polymer

Description description	THIAMINE DIPHOSPHATE
Molecular weight formula_weight	425.3 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 5 Entity 5 non-polymer

Description description	DI(HYDROXYETHYL)ETHER
Molecular weight formula_weight	106.1 kDa
Source method src_method	syn
Copy count entity_count	9

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	527

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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d1ozfa1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.31 — DHS-like NAD/FAD-binding domain
Superfamily Superfamily superfamily	c.31.1 — DHS-like NAD/FAD-binding domain
Family Family family	c.31.1.3 — Pyruvate oxidase and decarboxylase, middle domain

Domain ID domain_id	d1ozfa2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.36 — Thiamin diphosphate-binding fold (THDP-binding)
Superfamily Superfamily superfamily	c.36.1 — Thiamin diphosphate-binding fold (THDP-binding)
Family Family family	c.36.1.5 — Pyruvate oxidase and decarboxylase Pyr module

Domain ID domain_id	d1ozfa3
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.36 — Thiamin diphosphate-binding fold (THDP-binding)
Superfamily Superfamily superfamily	c.36.1 — Thiamin diphosphate-binding fold (THDP-binding)
Family Family family	c.36.1.9 — Pyruvate oxidase and decarboxylase PP module

Domain ID domain_id	d1ozfb1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.31 — DHS-like NAD/FAD-binding domain
Superfamily Superfamily superfamily	c.31.1 — DHS-like NAD/FAD-binding domain
Family Family family	c.31.1.3 — Pyruvate oxidase and decarboxylase, middle domain

Domain ID domain_id	d1ozfb2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.36 — Thiamin diphosphate-binding fold (THDP-binding)
Superfamily Superfamily superfamily	c.36.1 — Thiamin diphosphate-binding fold (THDP-binding)
Family Family family	c.36.1.5 — Pyruvate oxidase and decarboxylase Pyr module

Domain ID domain_id	d1ozfb3
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.36 — Thiamin diphosphate-binding fold (THDP-binding)
Superfamily Superfamily superfamily	c.36.1 — Thiamin diphosphate-binding fold (THDP-binding)
Family Family family	c.36.1.9 — Pyruvate oxidase and decarboxylase PP module

CATH v4.4 (6 domains)

Domain ID domain_id	1ozfA01
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	1ozfA02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1220 — TPP-binding domain

Domain ID domain_id	1ozfA03
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	1ozfB01
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	1ozfB02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1220 — TPP-binding domain

Domain ID domain_id	1ozfB03
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

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Unit-cell length a length_a	116.822 Å
Unit-cell length b length_b	160.573 Å
Unit-cell length c length_c	129.374 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	16

Space group space_group	C 2 2 21
Space-group number int_tables_number	20
Crystal system crystal_system	—

Resolution resolution	2.300 Å
Low-resolution limit resolution_low	100.000 Å
R factor r_factor	0.1650
R_work r_work	0.1650
R_free r_free	0.2140

The crystal structure of Klebsiella pneumoniae acetolactate synthase with enzyme-bound cofactors

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

Acetolactate synthase, catabolic

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

1ozf__assembly_1__model_1

1ozf__assembly_1__model_1 | I(q)

1ozf__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) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (1)

The crystal structure of Klebsiella pneumoniae acetolactate synthase with enzyme-bound cofactors

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

Acetolactate synthase, catabolic

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

1ozf__assembly_1__model_1

1ozf__assembly_1__model_1 | I(q)

1ozf__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) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (1)