6ET9 | pdb_00006et9

Structure of the acetoacetyl-CoA-thiolase/HMG-CoA-synthase complex from Methanothermococcus thermolithotrophicus at 2.75 A

External Resource: Annotation

Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
L	HMG_CoA_synt_C	e6et9L1	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: HMG_CoA_synt_C	ECOD (1.6)
L	HMG_CoA_synt_N	e6et9L2	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: HMG_CoA_synt_N	ECOD (1.6)
K	HMG_CoA_synt_C	e6et9K2	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: HMG_CoA_synt_C	ECOD (1.6)
K	HMG_CoA_synt_N	e6et9K1	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: HMG_CoA_synt_N	ECOD (1.6)
J	HMG_CoA_synt_C	e6et9J1	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: HMG_CoA_synt_C	ECOD (1.6)
J	HMG_CoA_synt_N	e6et9J2	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: HMG_CoA_synt_N	ECOD (1.6)
I	HMG_CoA_synt_C	e6et9I1	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: HMG_CoA_synt_C	ECOD (1.6)
I	HMG_CoA_synt_N	e6et9I2	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: HMG_CoA_synt_N	ECOD (1.6)
H	UNK_F_TYPE	e6et9H2	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: UNK_F_TYPE	ECOD (1.6)
H	DUF35_N	e6et9H1	A: few secondary structure elements	X: Rubredoxin-like	H: Rubredoxin-related	T: Rubredoxin-related	F: DUF35_N	ECOD (1.6)
G	UNK_F_TYPE	e6et9G2	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: UNK_F_TYPE	ECOD (1.6)
G	DUF35_N	e6et9G1	A: few secondary structure elements	X: Rubredoxin-like	H: Rubredoxin-related	T: Rubredoxin-related	F: DUF35_N	ECOD (1.6)
F	UNK_F_TYPE	e6et9F2	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: UNK_F_TYPE	ECOD (1.6)
F	DUF35_N	e6et9F1	A: few secondary structure elements	X: Rubredoxin-like	H: Rubredoxin-related	T: Rubredoxin-related	F: DUF35_N	ECOD (1.6)
E	UNK_F_TYPE	e6et9E1	A: beta barrels	X: OB-fold	H: Nucleic acid-binding proteins (From Topology)	T: Nucleic acid-binding proteins	F: UNK_F_TYPE	ECOD (1.6)
E	DUF35_N	e6et9E2	A: few secondary structure elements	X: Rubredoxin-like	H: Rubredoxin-related	T: Rubredoxin-related	F: DUF35_N	ECOD (1.6)
D	Thiolase_N	e6et9D2	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: Thiolase_N	ECOD (1.6)
D	Thiolase_C_1	e6et9D1	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: Thiolase_C_1	ECOD (1.6)
C	Thiolase_N	e6et9C2	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: Thiolase_N	ECOD (1.6)
C	Thiolase_C_1	e6et9C1	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: Thiolase_C_1	ECOD (1.6)
B	Thiolase_N	e6et9B1	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: Thiolase_N	ECOD (1.6)
B	Thiolase_C_1	e6et9B2	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: Thiolase_C_1	ECOD (1.6)
A	Thiolase_N	e6et9A2	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: Thiolase_N	ECOD (1.6)
A	Thiolase_C_1	e6et9A1	A: a/b three-layered sandwiches	X: Thiolase-like (From Topology)	H: Thiolase-like (From Topology)	T: Thiolase-like	F: Thiolase_C_1	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
I, J, K, L	PF08541	3-Oxoacyl-[acyl-carrier-protein (ACP)] synthase III C terminal (ACP_syn_III_C)	3-Oxoacyl-[acyl-carrier-protein (ACP)] synthase III C terminal	This domain is found on 3-Oxoacyl-[acyl-carrier-protein (ACP)] synthase III EC:2.3.1.41, the enzyme responsible for initiating the chain of reactions of the fatty acid synthase in plants and bacteria.	Domain
E, F, G, H	PF12172	ChsH2, rubredoxin-like zinc ribbon domain (zf-ChsH2)	ChsH2, rubredoxin-like zinc ribbon domain	This domain is found at the C-terminal end of the probable enoyl -CoA hydratase alpha subunit from Thermomonospora curvata (ChsH2) and similar archaeal and bacterial proteins. ChsH2 is likely to be involved in bile acid degradation. The C-terminal re ...	This domain is found at the C-terminal end of the probable enoyl -CoA hydratase alpha subunit from Thermomonospora curvata (ChsH2) and similar archaeal and bacterial proteins. ChsH2 is likely to be involved in bile acid degradation. The C-terminal region of this protein is organised into two domains: an N-terminal zinc finger domain with a three-stranded antiparallel beta-sheet and an N-terminal alpha-helix (this entry) and a OB-fold domain (Pfam:PF01796) [5]. The domain is duplicated in some members like Swiss:O53566 from M.tuberculosis. The structure of Swiss:Q97WQ4 from Saccharolobus solfataricus reveals two long N-terminal helices followed by a rubredoxin -like zinc ribbon domain represented in this family and a C-terminal OB fold domain [1]. Zinc is chelated by the four conserved cysteines in the alignment.	Domain
E, F, G, H	PF01796	ChsH2, C-terminal OB-fold domain (OB_ChsH2_C)	ChsH2, C-terminal OB-fold domain	This domain is found at the C-terminal end of the probable enoyl -CoA hydratase alpha subunit from Thermomonospora curvata (ChsH2) and similar archaeal and bacterial proteins. ChsH2 is likely to be involved in bile acid degradation. The C-terminal re ...	This domain is found at the C-terminal end of the probable enoyl -CoA hydratase alpha subunit from Thermomonospora curvata (ChsH2) and similar archaeal and bacterial proteins. ChsH2 is likely to be involved in bile acid degradation. The C-terminal region of this protein is organised into two domains: an N-terminal zinc finger domain (Pfam:PF12172) and an OB-fold domain (this entry) that consists of a five-stranded beta-barrel [6]. This domain is also found in 3-oxo-4,17- pregnadiene-20-carboxyl-CoA hydratase alpha subunit from Mycobacterium tuberculosis that is involved in cholesterol side chain degradation [3]. It is also found in Methanothermococcus thermolithotrophicus HMGCS, an enzyme complex comprising the thiolase and 3-hydroxy-3-methylglutaryl (HMG)-CoA synthase, that catalyses the second reaction in the mevalonate pathway-the exergonic condensation of acetoacetyl-CoA and acetyl-CoA to HMG-CoA [4].	Domain
A, B, C, D	PF00108	Thiolase, N-terminal domain (Thiolase_N)	Thiolase, N-terminal domain	Thiolase is reported to be structurally related to beta-ketoacyl synthase (Pfam:PF00109), and also chalcone synthase.	Domain
A, B, C, D	PF22691	Thiolase C-terminal domain-like (Thiolase_C_1)	Thiolase C-terminal domain-like	This domain is found C-terminal in a number of thiolases and their homologues. Thiolases are essential CoA-dependent enzymes in lipid metabolism. This domain folds into a four-stranded antiparallel beta-sheet with helices packed on one side.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
I, J, K, L	HydroxyMethylGlutaryl-CoA synthase	acetyl-CoA C-acetyltransferase activity acetyltransferase activity acyltransferase activity acyltransferase activity, transferring groups other than amino-acyl groups transferase activity acetyl-CoA C-acyltransferase activity C-acyltransferase activity catalytic activity C-acetyltransferase activity hydroxymethylglutaryl-CoA synthase activity acyltransferase activity, acyl groups converted into alkyl on transfer	isopentenyl diphosphate biosynthetic process lipid biosynthetic process acetyl-CoA metabolic process phospholipid metabolic process nucleobase-containing compound metabolic process acyl-CoA metabolic process nucleobase-containing small molecule metabolic process phosphate-containing compound metabolic process sulfur compound metabolic process small molecule metabolic process amide metabolic process phosphorus metabolic process nucleoside phosphate metabolic process isoprenoid biosynthetic process isopentenyl diphosphate biosynthetic process lipid biosynthetic process acetyl-CoA metabolic process phospholipid metabolic process nucleobase-containing compound metabolic process acyl-CoA metabolic process nucleobase-containing small molecule metabolic process phosphate-containing compound metabolic process sulfur compound metabolic process small molecule metabolic process amide metabolic process phosphorus metabolic process nucleoside phosphate metabolic process isoprenoid biosynthetic process primary metabolic process phospholipid biosynthetic process purine-containing compound metabolic process biosynthetic process organophosphate metabolic process organophosphate biosynthetic process metabolic process cellular process isopentenyl diphosphate biosynthetic process, mevalonate pathway lipid metabolic process isoprenoid metabolic process isopentenyl diphosphate metabolic process terpenoid biosynthetic process farnesyl diphosphate metabolic process farnesyl diphosphate biosynthetic process isoprenoid biosynthetic process via mevalonate farnesyl diphosphate biosynthetic process, mevalonate pathway terpenoid metabolic process	-
E, F, G, H	Pfam DUF35	cation binding ion binding binding metal ion binding small molecule binding	-	-
A, B, C, D	Acetyl-CoA acetyltransferase thiolase	acetyl-CoA C-acetyltransferase activity acetyltransferase activity acyltransferase activity acyltransferase activity, transferring groups other than amino-acyl groups transferase activity acetyl-CoA C-acyltransferase activity C-acyltransferase activity catalytic activity C-acetyltransferase activity	biosynthetic process isoprenoid biosynthetic process lipid biosynthetic process primary metabolic process metabolic process cellular process lipid metabolic process isoprenoid metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
I, J, K, L	IPR016039	Thiolase-like	Homologous Superfamily
I, J, K, L	IPR013528	Hydroxymethylglutaryl-coenzyme A synthase, N-terminal	Domain
I, J, K, L	IPR013747	Beta-ketoacyl-[acyl-carrier-protein] synthase III, C-terminal	Domain
I, J, K, L	IPR004656	Hydroxymethylglutaryl-CoA synthase	Family
E, F, G, H	IPR052513	Thioester Dehydratase-Related Protein	Family
E, F, G, H	IPR002878	ChsH2, C-terminal OB-fold domain	Domain
E, F, G, H	IPR012340	Nucleic acid-binding, OB-fold	Homologous Superfamily
E, F, G, H	IPR022002	ChsH2, rubredoxin-like zinc ribbon domain	Domain
A, B, C, D	IPR016039	Thiolase-like	Homologous Superfamily
A, B, C, D	IPR055140	Thiolase, C-terminal domain 2	Domain
A, B, C, D	IPR020616	Thiolase, N-terminal	Domain
A, B, C, D	IPR002155	Thiolase	Family