1ub7

The Crystal Analysis of Beta-Keroacyl-[Acyl Carrier Protein] Synthase III (FABH)From Thermus Thermophilus.

Method: X-RAY DIFFRACTION

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

3-oxoacyl-[acyl-carrier protein] synthase

Thermus thermophilus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	GLYCEROL × 3 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	GLYCEROL × 7 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q7SI99_THETH
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–322； UniProt 1–322 Author chain B； PDBConstruct 1–322； UniProt 1–322 Author chain C； PDBConstruct 1–322； UniProt 1–322 Author chain D； PDBConstruct 1–322； UniProt 1–322

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	1ub7
Deposition date deposition_date	2003-03-31
Structure title title	The Crystal Analysis of Beta-Keroacyl-[Acyl Carrier Protein] Synthase III (FABH)From Thermus Thermophilus.
Keywords keywords	;Fatty acid synthesis, Beta-Ketoacyl-ACP Synthase III, FABH, RIKEN Structural Genomics/Proteomics Initiative, RSGI, Structural Genomics, 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.

1ub7__assembly_2__model_1

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

Download this curve (.dat)

1ub7__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1ub7__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	25.52 Å
Rg (electron density)	24.15 Å
Total Rg	25.05 Å
Atom count	4900
Residues	640
Excluded volume	87308 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1ub7__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1ub7__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 (3)

Entity 1 Entity 1 polymer

Description description	3-oxoacyl-[acyl-carrier protein] synthase
Molecular weight formula_weight	34571.3 kDa
EC 编号 ec_number	2.3.1.41
Mutation mutation	L290V
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	10103

MSGILALGAYVPERVMTNADFEAYLDTSDEWIVTRTGIKERRVAAEDEYTSDLAFKAVEDLLRRHPGALEGVDAVIVATNTPDALFPDTAALVQARFGLKAFAYDLLAGCPGWIYALAQAHALVEAGLAQKVLAVGAEALSKIIDWNDRATAVLFGDGGGAAVVGKVREGYGFRSFVLGADGTGAKELYHACVAPRLPDGTSMKNRLYMNGREVFKFAVRVMNTATLEAIEKAGLTPEDIRLFVPHQANLRIIDAARERLGLPWERVAVNVDRYGNTSTASIPLALKEAVDAGRIREGDHVLLVSFGAGLTWAAAVLTWGGA

Source Source

Source organism organism	Thermus thermophilus
NCBI taxonomy ID ncbi_taxonomy_id	300852
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	GLYCEROL
Molecular weight formula_weight	92.1 kDa
Source method src_method	syn
Copy count entity_count	10

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	327

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6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d1ub7a1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.95 — Thiolase-like
Superfamily Superfamily superfamily	c.95.1 — Thiolase-like
Family Family family	c.95.1.2 — Chalcone synthase-like

Domain ID domain_id	d1ub7a2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.95 — Thiolase-like
Superfamily Superfamily superfamily	c.95.1 — Thiolase-like
Family Family family	c.95.1.2 — Chalcone synthase-like

Domain ID domain_id	d1ub7b1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.95 — Thiolase-like
Superfamily Superfamily superfamily	c.95.1 — Thiolase-like
Family Family family	c.95.1.2 — Chalcone synthase-like

Domain ID domain_id	d1ub7b2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.95 — Thiolase-like
Superfamily Superfamily superfamily	c.95.1 — Thiolase-like
Family Family family	c.95.1.2 — Chalcone synthase-like

Domain ID domain_id	d1ub7c1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.95 — Thiolase-like
Superfamily Superfamily superfamily	c.95.1 — Thiolase-like
Family Family family	c.95.1.2 — Chalcone synthase-like

Domain ID domain_id	d1ub7c2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.95 — Thiolase-like
Superfamily Superfamily superfamily	c.95.1 — Thiolase-like
Family Family family	c.95.1.2 — Chalcone synthase-like

Domain ID domain_id	d1ub7d1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.95 — Thiolase-like
Superfamily Superfamily superfamily	c.95.1 — Thiolase-like
Family Family family	c.95.1.2 — Chalcone synthase-like

Domain ID domain_id	d1ub7d2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.95 — Thiolase-like
Superfamily Superfamily superfamily	c.95.1 — Thiolase-like
Family Family family	c.95.1.2 — Chalcone synthase-like

CATH v4.4 (8 domains)

Domain ID domain_id	1ub7A01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	47 — Peroxisomal Thiolase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Thiolase/Chalcone synthase

Domain ID domain_id	1ub7A02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	47 — Peroxisomal Thiolase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Thiolase/Chalcone synthase

Domain ID domain_id	1ub7B01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	47 — Peroxisomal Thiolase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Thiolase/Chalcone synthase

Domain ID domain_id	1ub7B02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	47 — Peroxisomal Thiolase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Thiolase/Chalcone synthase

Domain ID domain_id	1ub7C01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	47 — Peroxisomal Thiolase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Thiolase/Chalcone synthase

Domain ID domain_id	1ub7C02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	47 — Peroxisomal Thiolase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Thiolase/Chalcone synthase

Domain ID domain_id	1ub7D01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	47 — Peroxisomal Thiolase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Thiolase/Chalcone synthase

Domain ID domain_id	1ub7D02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	47 — Peroxisomal Thiolase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Thiolase/Chalcone synthase

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Unit-cell length a length_a	57.586 Å
Unit-cell length b length_b	91.355 Å
Unit-cell length c length_c	149.436 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	98.26 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	2.300 Å
Low-resolution limit resolution_low	45.680 Å
R factor r_factor	0.1930
R_work r_work	0.1930
R_free r_free	0.2410

The Crystal Analysis of Beta-Keroacyl-[Acyl Carrier Protein] Synthase III (FABH)From Thermus Thermophilus.

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

3-oxoacyl-[acyl-carrier protein] 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

1ub7__assembly_2__model_1

1ub7__assembly_2__model_1 | I(q)

1ub7__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

7. Citations (1)

The Crystal Analysis of Beta-Keroacyl-[Acyl Carrier Protein] Synthase III (FABH)From Thermus Thermophilus.

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

3-oxoacyl-[acyl-carrier protein] 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

1ub7__assembly_2__model_1

1ub7__assembly_2__model_1 | I(q)

1ub7__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

7. Citations (1)