1g5x

The Structure of Beta-Ketoacyl-[Acyl Carrier Protein] Synthase I

Method: X-RAY DIFFRACTION D_max: 132.2 Å Quality: GOOD

▼

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

BETA-KETOACYL ACYL CARRIER PROTEIN SYNTHASE I

Escherichia coli

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Protein homooligomer Homooligomer Protein × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain A； UniProt 1–406 Chain B； UniProt 1–406	Not recorded	No other associated polymer	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；ammonium sulfate, PEG 400, tris, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 2.45 Å R-free 0.266
2	Protein homooligomer Homooligomer Protein × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain C； UniProt 1–406 Chain D； UniProt 1–406	Not recorded	No other associated polymer	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；ammonium sulfate, PEG 400, tris, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 2.45 Å R-free 0.266

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB	Difference from Current Entry 1G5X	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1DD8 CRYSTAL STRUCTURE OF BETA-KETOACYL-[ACYL CARRIER PROTEIN] SYNTHASE I FROM ESCHERICHIA COLI Deposited 1999-11-09	Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–406（406 aa） Chain B 1–406（406 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.4；293 K；bis-tris propane, ammonium sulfate, PEG400, pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 20K	Resolution 2.30 Å R-free 0.219
1DD8 CRYSTAL STRUCTURE OF BETA-KETOACYL-[ACYL CARRIER PROTEIN] SYNTHASE I FROM ESCHERICHIA COLI Deposited 1999-11-09	Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 1–406（406 aa） Chain D 1–406（406 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.4；293 K；bis-tris propane, ammonium sulfate, PEG400, pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 20K	Resolution 2.30 Å R-free 0.219
1EK4 BETA-KETOACYL [ACYL CARRIER PROTEIN] SYNTHASE I IN COMPLEX WITH DODECANOIC ACID TO 1.85 RESOLUTION Deposited 2000-03-06	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–406（406 aa） Chain B 1–406（406 aa）	Mutation：C163S, MRGSHHHHHHGS N-TERMINAL HIS-TAG (NOT IN MODEL) Mutation：C163S, MRGSHHHHHHGS N-TERMINAL HIS-TAG (NOT IN MODEL)	DAO LAURIC ACID × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.4；294 K；1.8 M ammonium sulfate, 2 % PEG400, 0.1 M bis-Tris propane, pH 6.5, resulting pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 294K	Resolution 1.85 Å R-free 0.196
1EK4 BETA-KETOACYL [ACYL CARRIER PROTEIN] SYNTHASE I IN COMPLEX WITH DODECANOIC ACID TO 1.85 RESOLUTION Deposited 2000-03-06	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 1–406（406 aa） Chain D 1–406（406 aa）	Mutation：C163S, MRGSHHHHHHGS N-TERMINAL HIS-TAG (NOT IN MODEL) Mutation：C163S, MRGSHHHHHHGS N-TERMINAL HIS-TAG (NOT IN MODEL)	DAO LAURIC ACID × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.4；294 K；1.8 M ammonium sulfate, 2 % PEG400, 0.1 M bis-Tris propane, pH 6.5, resulting pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 294K	Resolution 1.85 Å R-free 0.196
1F91 BETA-KETOACYL-[ACYL-CARRIER-PROTEIN] SYNTHASE I IN COMPLEX WITH C10 FATTY ACID SUBSTRATE Deposited 2000-07-06	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–406（406 aa） Chain B 1–406（406 aa）	Mutation：C163S Mutation：C163S	OH HYDROXIDE ION × 2 DKA DECANOIC ACID × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 7.4；294 K；1.9 M ammonium sulfate, 2% PEG400, 0.1 M bis-Tris propane pH 6.5, pH 7.4, VAPOR DIFFUSION, temperature 294K	Resolution 2.40 Å R-free 0.209
1F91 BETA-KETOACYL-[ACYL-CARRIER-PROTEIN] SYNTHASE I IN COMPLEX WITH C10 FATTY ACID SUBSTRATE Deposited 2000-07-06	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 1–406（406 aa） Chain D 1–406（406 aa）	Mutation：C163S Mutation：C163S	OH HYDROXIDE ION × 2 DKA DECANOIC ACID × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 7.4；294 K；1.9 M ammonium sulfate, 2% PEG400, 0.1 M bis-Tris propane pH 6.5, pH 7.4, VAPOR DIFFUSION, temperature 294K	Resolution 2.40 Å R-free 0.209
1FJ4 THE STRUCTURE OF BETA-KETOACYL-[ACYL CARRIER PROTEIN] SYNTHASE I IN COMPLEX WITH THIOLACTOMYCIN, IMPLICATIONS FOR DRUG DESIGN Deposited 2000-08-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–406（406 aa） Chain B 1–406（406 aa）	Not recorded	TLM THIOLACTOMYCIN × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；Ammonium Sulfate, PEG 400, Tris, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 2.35 Å R-free 0.253
1FJ4 THE STRUCTURE OF BETA-KETOACYL-[ACYL CARRIER PROTEIN] SYNTHASE I IN COMPLEX WITH THIOLACTOMYCIN, IMPLICATIONS FOR DRUG DESIGN Deposited 2000-08-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 1–406（406 aa） Chain D 1–406（406 aa）	Not recorded	TLM THIOLACTOMYCIN × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；Ammonium Sulfate, PEG 400, Tris, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 2.35 Å R-free 0.253
1FJ8 THE STRUCTURE OF BETA-KETOACYL-[ACYL CARRIER PROTEIN] SYNTHASE I IN COMPLEX WITH CERULENIN, IMPLICATIONS FOR DRUG DESIGN Deposited 2000-08-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–406（406 aa） Chain B 1–406（406 aa）	Not recorded	CER (2S, 3R)-3-HYDROXY-4-OXO-7,10-TRANS,TRANS-DODECADIENAMIDE × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；ammonium sulfate, PEG 400, Tris, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 2.27 Å R-free 0.265
1FJ8 THE STRUCTURE OF BETA-KETOACYL-[ACYL CARRIER PROTEIN] SYNTHASE I IN COMPLEX WITH CERULENIN, IMPLICATIONS FOR DRUG DESIGN Deposited 2000-08-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 1–406（406 aa） Chain D 1–406（406 aa）	Not recorded	CER (2S, 3R)-3-HYDROXY-4-OXO-7,10-TRANS,TRANS-DODECADIENAMIDE × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；ammonium sulfate, PEG 400, Tris, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 2.27 Å R-free 0.265
2AQ7 Structure-activity relationships at the 5-posiiton of thiolactomycin: an intact 5(R)-isoprene unit is required for activity against the condensing enzymes from Mycobacterium tuberculosis and Escherichia coli Deposited 2005-08-17	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–406（406 aa） Chain B 1–406（406 aa）	Not recorded	TL5 (5R)-4-HYDROXY-3,5-DIMETHYL-5-[(1E,3E)-2-METHYLPENTA-1,3-DIENYL]THIOPHEN-2(5H)-ONE × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；290 K；1.9 M Ammonium Sulfate, 0.1 M HEPES pH 7.5, 2% PEG400, VAPOR DIFFUSION, HANGING DROP, temperature 290K	Resolution 2.30 Å R-free 0.228
2AQ7 Structure-activity relationships at the 5-posiiton of thiolactomycin: an intact 5(R)-isoprene unit is required for activity against the condensing enzymes from Mycobacterium tuberculosis and Escherichia coli Deposited 2005-08-17	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 1–406（406 aa） Chain D 1–406（406 aa）	Not recorded	TL5 (5R)-4-HYDROXY-3,5-DIMETHYL-5-[(1E,3E)-2-METHYLPENTA-1,3-DIENYL]THIOPHEN-2(5H)-ONE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；290 K；1.9 M Ammonium Sulfate, 0.1 M HEPES pH 7.5, 2% PEG400, VAPOR DIFFUSION, HANGING DROP, temperature 290K	Resolution 2.30 Å R-free 0.228
2AQB Structure-activity relationships at the 5-position of thiolactomycin: an intact 5(R)-isoprene unit is required for activity against the condensing enzymes from Mycobacterium tuberculosis and Escherchia coli Deposited 2005-08-17	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–406（406 aa） Chain B 1–406（406 aa）	Not recorded	TL6 (5R)-5-[(1E)-BUTA-1,3-DIENYL]-4-HYDROXY-3,5-DIMETHYLTHIOPHEN-2(5H)-ONE × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；290 K；1.9 M Ammonium Sulfate, 0.1 M HEPES pH 7.5, 2% PEG400, VAPOR DIFFUSION, HANGING DROP, temperature 290K	Resolution 2.19 Å R-free 0.225
2AQB Structure-activity relationships at the 5-position of thiolactomycin: an intact 5(R)-isoprene unit is required for activity against the condensing enzymes from Mycobacterium tuberculosis and Escherchia coli Deposited 2005-08-17	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 1–406（406 aa） Chain D 1–406（406 aa）	Not recorded	TL6 (5R)-5-[(1E)-BUTA-1,3-DIENYL]-4-HYDROXY-3,5-DIMETHYLTHIOPHEN-2(5H)-ONE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；290 K；1.9 M Ammonium Sulfate, 0.1 M HEPES pH 7.5, 2% PEG400, VAPOR DIFFUSION, HANGING DROP, temperature 290K	Resolution 2.19 Å R-free 0.225
2VB7 beta-ketoacyl-ACP synthase I (KAS) from E. coli, apo structure after soak in PEG solution Deposited 2007-09-06	Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–406（406 aa） Chain B 1–406（406 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；CRYSTALLIZATION CONDITIONS: HANGING DROP AGAINST 3% PEG 400, 1.9 M AMMONIUM SULPHATE, 0.1 M TRIS PH 7.5 SOAK IN 30% PEG8000, 0.1M AMMONIUM SULPHATE, 0.1M TRIS PH7.5, NO LIGAND	Resolution 1.60 Å R-free 0.186
2VB7 beta-ketoacyl-ACP synthase I (KAS) from E. coli, apo structure after soak in PEG solution Deposited 2007-09-06	Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 1–406（406 aa） Chain D 1–406（406 aa）	Non-standard monomer：Yes (specific site not provided by mmCIF)	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；CRYSTALLIZATION CONDITIONS: HANGING DROP AGAINST 3% PEG 400, 1.9 M AMMONIUM SULPHATE, 0.1 M TRIS PH 7.5 SOAK IN 30% PEG8000, 0.1M AMMONIUM SULPHATE, 0.1M TRIS PH7.5, NO LIGAND	Resolution 1.60 Å R-free 0.186
2VB8 beta-ketoacyl-ACP synthase I (KAS) from E. coli with bound inhibitor thiolactomycin Deposited 2007-09-06	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–406（406 aa） Chain B 1–406（406 aa）	Not recorded	TLM THIOLACTOMYCIN × 2 CL CHLORIDE ION × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；CRYSTALLIZATION CONDITIONS: HANGING DROP AGAINST 3% PEG 400, 1.9 M AMMONIUM SULPHATE, 0.1 M TRIS PH 7.5; SOAK WITH 0.3MM LIGAND IN 2.3M AMMONIUM SULPHATE, 0.1M TRIS PH7.5, 3% DMSO	Resolution 1.52 Å R-free 0.185
2VB8 beta-ketoacyl-ACP synthase I (KAS) from E. coli with bound inhibitor thiolactomycin Deposited 2007-09-06	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 1–406（406 aa） Chain D 1–406（406 aa）	Not recorded	TLM THIOLACTOMYCIN × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；CRYSTALLIZATION CONDITIONS: HANGING DROP AGAINST 3% PEG 400, 1.9 M AMMONIUM SULPHATE, 0.1 M TRIS PH 7.5; SOAK WITH 0.3MM LIGAND IN 2.3M AMMONIUM SULPHATE, 0.1M TRIS PH7.5, 3% DMSO	Resolution 1.52 Å R-free 0.185
2VB9 beta-ketoacyl-ACP synthase I (KAS) from E. coli, apo structure Deposited 2007-09-06	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–406（406 aa） Chain B 1–406（406 aa）	Not recorded	CL CHLORIDE ION × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；CRYSTALLIZATION CONDITIONS: HANGING DROP AGAINST 3% PEG 400, 1.9 M AMMONIUM SULPHATE, 0.1 M TRIS PH 7.5	Resolution 1.50 Å R-free 0.238
2VB9 beta-ketoacyl-ACP synthase I (KAS) from E. coli, apo structure Deposited 2007-09-06	Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 1–406（406 aa） Chain D 1–406（406 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；CRYSTALLIZATION CONDITIONS: HANGING DROP AGAINST 3% PEG 400, 1.9 M AMMONIUM SULPHATE, 0.1 M TRIS PH 7.5	Resolution 1.50 Å R-free 0.238
2VBA beta-ketoacyl-ACP synthase I (KAS) from E. coli with bound amino- thiazole inhibitor Deposited 2007-09-06	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–406（406 aa） Chain B 1–406（406 aa）	Not recorded	P4T 2-PHENYLAMINO-4-METHYL-5-ACETYL THIAZOLE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；CRYSTALLIZATION CONDITIONS: HANGING DROP AGAINST 3% PEG 400, 1.9 M AMMONIUM SULPHATE, 0.1 M TRIS PH 7.5 SOAK WITH 0.01M LIGAND IN 30% PEG8000, 0.1M AMMONIUM SULPHATE, 0.1M TRIS PH7.5, 0.005M TCEP	Resolution 1.36 Å R-free 0.151
2VBA beta-ketoacyl-ACP synthase I (KAS) from E. coli with bound amino- thiazole inhibitor Deposited 2007-09-06	Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 1–406（406 aa） Chain D 1–406（406 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；CRYSTALLIZATION CONDITIONS: HANGING DROP AGAINST 3% PEG 400, 1.9 M AMMONIUM SULPHATE, 0.1 M TRIS PH 7.5 SOAK WITH 0.01M LIGAND IN 30% PEG8000, 0.1M AMMONIUM SULPHATE, 0.1M TRIS PH7.5, 0.005M TCEP	Resolution 1.36 Å R-free 0.151
6OKC Crosslinked Crystal Structure of Type II Fatty Acid Synthase Ketosynthase, FabB, and C12-crypto Acyl Carrier Protein, AcpP Deposited 2019-04-12	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 1–406（406 aa） Chain B 1–406（406 aa）	Not recorded	MRJ N-[2-(dodecanoylamino)ethyl]-N~3~-[(2R)-2-hydroxy-3,3-dimethyl-4-(phosphonooxy)butanoyl]-beta-alaninamide × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；281 K；20% PEG 8K, 0.2 M magnesium acetate, 0.1 M sodium cacodylate pH 6.5	Resolution 1.55 Å R-free 0.164
6OKF Crosslinked Crystal Structure of Type II Fatty Acid Synthase Ketosynthase, FabB, and C16-crypto Acyl Carrier Protein, AcpP Deposited 2019-04-12	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 1–406（406 aa） Chain B 1–406（406 aa）	Not recorded	NA SODIUM ION × 2 MRJ N-[2-(dodecanoylamino)ethyl]-N~3~-[(2R)-2-hydroxy-3,3-dimethyl-4-(phosphonooxy)butanoyl]-beta-alaninamide × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；281 K；26% PEG 8K, 0.1 M sodium cacodylate pH 6.5, and 0.3 M sodium acetate	Resolution 2.50 Å R-free 0.218
7SZ9 Crosslinked Crystal Structure of Type II Fatty Acid Synthase Ketosynthase, FabB, and C16:1-crypto Acyl Carrier Protein, AcpP Deposited 2021-11-26	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 2–405（404 aa） Chain B 2–405（404 aa）	Not recorded	NA SODIUM ION × 2 DJ5 N~3~-{(2R)-4-[(dihydroxyphosphanyl)oxy]-2-hydroxy-3,3-dimethylbutanoyl}-N-(2-{[(9Z)-hexadec-9-enoyl]amino}ethyl)-beta-alaninamide × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；281 K；20% PEG 8000, 0.3 M sodium acetate, 0.1 M sodium cacodylate	Resolution 2.20 Å R-free 0.255
8SMS Crosslinked Crystal Structure of Type II Fatty Acid Synthase, FabB, and cerulenin crosslinker-crypto Acyl Carrier Protein, AcpP Deposited 2023-04-26	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 2–405（404 aa） Chain B 2–405（404 aa）	Not recorded	G7U N~3~-[(2R)-2-hydroxy-3,3-dimethyl-4-(phosphonooxy)butanoyl]-N-{2-[(2R)-2-hydroxy-4-oxododecanamido]ethyl}-beta-alaninamide × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；281 K；26% PEG 8000, 0.3M sodium acetate, 0.1 M sodium cacodylate pH 6.0,	Resolution 1.93 Å R-free 0.255
9MLW Crosslinked complex of ketosynthase FabB mutant FabBG107M and acyl carrier protein AcpP from E.coli with C8 crosslinker Deposited 2024-12-19	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 2–406（405 aa） Chain B 2–406（405 aa）	Mutation：G107M Mutation：G107M	A1BMZ N~3~-[(2R)-2-hydroxy-3,3-dimethyl-4-(phosphonooxy)butanoyl]-N-(2-octanamidoethyl)-beta-alaninamide × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；277 K；Sodium Cacodylate pH 6.0, 28% PEG8K, NaCH3COO	Resolution 2.21 Å R-free 0.243

16 other PDB entries and 27 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	FABB_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–406； UniProt 1–406 Author chain B； PDBConstruct 1–406； UniProt 1–406 Author chain C； PDBConstruct 1–406； UniProt 1–406 Author chain D； PDBConstruct 1–406； UniProt 1–406

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.

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

Download Download SAXS (.dat) P(r) (.pr.out) CIF

▼

2. Structure Basics 2. Structure Basics

Entry ID entry_id	1g5x
Deposition date deposition_date	2000-11-02
Structure title title	The Structure of Beta-Ketoacyl-[Acyl Carrier Protein] Synthase I
Keywords keywords	enzyme, gene duplication, TRANSFERASE; TRANSFERASE
Experimental Method method	X-RAY DIFFRACTION

▼

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier	40.39 Å
Radius of gyration Rg (electron density) rg_electron	40.26 Å
Forward intensity I(0) i0	449423000.00
Molecular weight molecular_weight	168840.0 kDa
Excluded volume excluded_volume	209100 Å³
Envelope volume envelope_volume	256560 Å³
Hydration-shell volume shell_volume	52296 Å³
Envelope diameter envelope_diameter	131.2 Å
Shell Rg shell_rg	46.70 Å
Envelope Rg envelope_rg	39.70 Å
Shape Rg shape_rg	40.27 Å
Total Rg total_rg	40.51 Å
Total atoms total_atoms	11820
Residues n_residues	1612
Spherical-harmonic order n_harmonics	20
q range q_range	— – 0.5000 Å⁻¹
Data points n_points	101
Shell type shell_type	directional
Solvent electron density solvent_density	0.3340 e/Å³
Shell contrast contrast_shell	0.0300 e/Å³
CRYSOL version crysol_version	4.1.3

▼

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax	132.2 Å
Rg (real space) rg_real	40.47 Å
Rg uncertainty (real space) rg_real_error	1.16 Å
I(0) (real space) i0_real	4.4940e+08
I(0) uncertainty (real space) i0_real_error	7.8250e+06
Rg (reciprocal space) rg_reciprocal	40.39 Å
I(0) (reciprocal space) i0_reciprocal	449400000.0000
Solution quality estimate total_estimate	0.8593
Solution quality rating solution_quality	GOOD a GOOD solution
P(r) peaks n_peaks	1
Primary peak position r_peak_primary	33.9 Å
Skewness Skewness skewness	0.291
Kurtosis Kurtosis kurtosis	-0.775
Angular range angular_range	— – 0.1950 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	191700000.0000
Real-space data points n_real_points	40
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.813; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.861; Smooth: 0.867

▶

5. Crystallography and Experiment 5. Crystallography & Experiment

▶

6. Entities and Polymers Entities & Polymers (2)

▼

7. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d1g5xa1
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.95.1.1 — Thiolase-related

Domain ID domain_id	d1g5xa2
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.95.1.1 — Thiolase-related

Domain ID domain_id	d1g5xb1
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.95.1.1 — Thiolase-related

Domain ID domain_id	d1g5xb2
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.95.1.1 — Thiolase-related

Domain ID domain_id	d1g5xc1
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.95.1.1 — Thiolase-related

Domain ID domain_id	d1g5xc2
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.95.1.1 — Thiolase-related

Domain ID domain_id	d1g5xd1
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.95.1.1 — Thiolase-related

Domain ID domain_id	d1g5xd2
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.95.1.1 — Thiolase-related

CATH v4.4 (8 domains)

Domain ID domain_id	1g5xA01
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	1g5xA02
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	1g5xB01
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	1g5xB02
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	1g5xC01
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	1g5xC02
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	1g5xD01
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	1g5xD02
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

▶

8. Citations (1)

▶

Unit-cell length a length_a	59.100 Å
Unit-cell length b length_b	139.600 Å
Unit-cell length c length_c	212.300 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	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.450 Å
Low-resolution limit resolution_low	19.900 Å
R factor r_factor	0.2060
R_work r_work	0.1990
R_free r_free	0.2660

Description description	BETA-KETOACYL ACYL CARRIER PROTEIN SYNTHASE I
Molecular weight formula_weight	42656.2 kDa
EC 编号 ec_number	2.3.1.41
Source method src_method	man
Copy count entity_count	4

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	12220

The Structure of Beta-Ketoacyl-[Acyl Carrier Protein] Synthase I

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

BETA-KETOACYL ACYL CARRIER PROTEIN SYNTHASE I

State in the Current Structure

Other States of the Same Protein in the Database

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

2. Structure Basics 2. Structure Basics

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

5. Crystallography and Experiment 5. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

6. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

来源 Source

Entity 2 Entity 2 water

7. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

8. Citations (1)

9. Files and Curves (10)

Files (7)

Curves (3)

来源生物 organism	Escherichia coli
NCBI Class编号 ncbi_taxonomy_id	562
宿主生物 host_organism	Escherichia coli

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	400

fit	/app/data/saxs_computation/g5/1g5x/1g5x.fit
pddf	/app/data/pr_computation/g5/1g5x/1g5x.pr.out
profile	/app/data/saxs_computation/g5/1g5x/1g5x.dat