1DD8

CRYSTAL STRUCTURE OF BETA-KETOACYL-[ACYL CARRIER PROTEIN] SYNTHASE I FROM ESCHERICHIA COLI

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Structure Motif: Primary M-CSA Annotation

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1dd8a2	Alpha and beta proteins (a/b)	Thiolase-like	Thiolase-like	Thiolase-related	Beta-ketoacyl-ACP synthase I, C-terminal domain	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d1dd8a1	Alpha and beta proteins (a/b)	Thiolase-like	Thiolase-like	Thiolase-related	Beta-ketoacyl-ACP synthase I, N-terminal domain	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d1dd8b2	Alpha and beta proteins (a/b)	Thiolase-like	Thiolase-like	Thiolase-related	Beta-ketoacyl-ACP synthase I, C-terminal domain	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d1dd8b1	Alpha and beta proteins (a/b)	Thiolase-like	Thiolase-like	Thiolase-related	Beta-ketoacyl-ACP synthase I, N-terminal domain	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
C	d1dd8c2	Alpha and beta proteins (a/b)	Thiolase-like	Thiolase-like	Thiolase-related	Beta-ketoacyl-ACP synthase I, C-terminal domain	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
C	d1dd8c1	Alpha and beta proteins (a/b)	Thiolase-like	Thiolase-like	Thiolase-related	Beta-ketoacyl-ACP synthase I, N-terminal domain	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
D	d1dd8d2	Alpha and beta proteins (a/b)	Thiolase-like	Thiolase-like	Thiolase-related	Beta-ketoacyl-ACP synthase I, C-terminal domain	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
D	d1dd8d1	Alpha and beta proteins (a/b)	Thiolase-like	Thiolase-like	Thiolase-related	Beta-ketoacyl-ACP synthase I, N-terminal domain	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Thiolase-like	8037440	3000122	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Thiolase-like	8037437	3000122	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Thiolase-like	8037440	3000122	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Thiolase-like	8037437	3000122	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Thiolase-like	8037437	3000122	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Thiolase-like	8037440	3000122	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Thiolase-like	8037437	3000122	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Thiolase-like	8037440	3000122	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	ketoacyl-synt	e1dd8A1	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: ketoacyl-synt	ECOD (1.6)
A	Ketoacyl-synt_C	e1dd8A2	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: Ketoacyl-synt_C	ECOD (1.6)
B	ketoacyl-synt	e1dd8B1	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: ketoacyl-synt	ECOD (1.6)
B	Ketoacyl-synt_C	e1dd8B2	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: Ketoacyl-synt_C	ECOD (1.6)
C	ketoacyl-synt	e1dd8C1	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: ketoacyl-synt	ECOD (1.6)
C	Ketoacyl-synt_C	e1dd8C2	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: Ketoacyl-synt_C	ECOD (1.6)
D	ketoacyl-synt	e1dd8D1	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: ketoacyl-synt	ECOD (1.6)
D	Ketoacyl-synt_C	e1dd8D2	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: Ketoacyl-synt_C	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.47.10	Alpha Beta	3-Layer(aba) Sandwich	Peroxisomal Thiolase	Chain A, domain 1	CATH (4.3.0)
B	3.40.47.10	Alpha Beta	3-Layer(aba) Sandwich	Peroxisomal Thiolase	Chain A, domain 1	CATH (4.3.0)
C	3.40.47.10	Alpha Beta	3-Layer(aba) Sandwich	Peroxisomal Thiolase	Chain A, domain 1	CATH (4.3.0)
D	3.40.47.10	Alpha Beta	3-Layer(aba) Sandwich	Peroxisomal Thiolase	Chain A, domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF02801	Beta-ketoacyl synthase, C-terminal domain (Ketoacyl-synt_C)	Beta-ketoacyl synthase, C-terminal domain	The structure of beta-ketoacyl synthase is similar to that of the thiolase family (Pfam:PF00108) and also chalcone synthase. The active site of beta-ketoacyl synthase is located between the N and C-terminal domains.	Domain
A, B, C, D	PF00109	Beta-ketoacyl synthase, N-terminal domain (ketoacyl-synt)	Beta-ketoacyl synthase, N-terminal domain	The structure of beta-ketoacyl synthase is similar to that of the thiolase family (Pfam:PF00108) and also chalcone synthase. The active site of beta-ketoacyl synthase is located between the N and C-terminal domains. The N-terminal domain contains m ...	The structure of beta-ketoacyl synthase is similar to that of the thiolase family (Pfam:PF00108) and also chalcone synthase. The active site of beta-ketoacyl synthase is located between the N and C-terminal domains. The N-terminal domain contains most of the structures involved in dimer formation and also the active site cysteine [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	BETA-KETOACYL [ACYL CARRIER PROTEIN] SYNTHASE I	acyltransferase activity 3-oxoacyl-[acyl-carrier-protein] synthase activity acyltransferase activity, transferring groups other than amino-acyl groups transferase activity catalytic activity	oxoacid metabolic process cellular biosynthetic process lipid biosynthetic process organic acid metabolic process organic acid biosynthetic process carboxylic acid biosynthetic process organic substance metabolic process organic substance biosynthetic process small molecule metabolic process fatty acid metabolic process monocarboxylic acid biosynthetic process small molecule biosynthetic process cellular metabolic process carboxylic acid metabolic process oxoacid metabolic process cellular biosynthetic process lipid biosynthetic process organic acid metabolic process organic acid biosynthetic process carboxylic acid biosynthetic process organic substance metabolic process organic substance biosynthetic process small molecule metabolic process fatty acid metabolic process monocarboxylic acid biosynthetic process small molecule biosynthetic process cellular metabolic process carboxylic acid metabolic process primary metabolic process fatty acid biosynthetic process monounsaturated fatty acid biosynthetic process biosynthetic process cellular lipid metabolic process monounsaturated fatty acid metabolic process metabolic process cellular process monocarboxylic acid metabolic process lipid metabolic process	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR016039	Thiolase-like	Homologous Superfamily
A, B, C, D	IPR014031	Beta-ketoacyl synthase, C-terminal	Domain
A, B, C, D	IPR000794	Beta-ketoacyl synthase	Family
A, B, C, D	IPR018201	Beta-ketoacyl synthase, active site	Active Site
A, B, C, D	IPR020841	Polyketide synthase, beta-ketoacyl synthase domain	Domain
A, B, C, D	IPR014030	Beta-ketoacyl synthase, N-terminal	Domain

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

Chains	Enzyme Name	Description	Catalytic Residues
A	beta-ketoacyl-[acyl carrier protein] synthase I M-CSA #292	Beta-ketoacyl-acyl carrier protein synthase (KAS) I catalyses the Claisen condensation between acyl-ACP and malonyl-ACP to produce free acyl carrier protein (ACP), 3-oxoacyl ACP, and carbon dioxide. KAS I fuctions, together with KAS II and KAS III, to synthesise C16 and C18 fatty acids in plant plastids: KAS III is specific for the first step of the elongation and uses a CoA-activated primer substrate, while KAS I extends C4 to C16 in six rounds of elongation using an ACP substrate. KAS II then carries out an additional step to yield C18. In Escherichia coli, KAS I is essential for the construction of the unsaturated fatty acids characterising Escherichia coli membrane lipids.	Defined by 6 residues: CYS:A-163HIS:A-298LYS:A-328HIS:A-333PHE:A-390PHE:A-392 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 2.3.1.41 (PDB Primary Data) Search M-CSA Motif + EC 2.3.1.41

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.