1MKB
ESCHERICHIA COLI BETA-HYDROXYDECANOYL THIOL ESTER DEHYDRASE AT PH 5 AND 21 DEGREES C
External Resource: Annotation
Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage
Chains | Domain Info | Class | Fold | Superfamily | Family | Domain | Species | Provenance Source (Version) |
---|---|---|---|---|---|---|---|---|
A | d1mkba_ | Alpha and beta proteins (a+b) | Thioesterase/thiol ester dehydrase-isomerase | Thioesterase/thiol ester dehydrase-isomerase | beta-Hydroxydecanol thiol ester dehydrase | beta-Hydroxydecanol thiol ester dehydrase | (Escherichia coli ) [TaxId: 562 ], | SCOPe (2.08) |
B | d1mkbb_ | Alpha and beta proteins (a+b) | Thioesterase/thiol ester dehydrase-isomerase | Thioesterase/thiol ester dehydrase-isomerase | beta-Hydroxydecanol thiol ester dehydrase | beta-Hydroxydecanol thiol ester dehydrase | (Escherichia coli ) [TaxId: 562 ], | SCOPe (2.08) |
Domain Annotation: ECOD Classification ECOD Database Homepage
Chains | Family Name | Domain Identifier | Architecture | Possible Homology | Homology | Topology | Family | Provenance Source (Version) |
---|---|---|---|---|---|---|---|---|
A | PF07977 | e1mkbA1 | A: a+b two layers | X: Thioesterase/thiol ester dehydrase-isomerase-like | H: Thioesterase/thiol ester dehydrase-isomerase (From Topology) | T: Thioesterase/thiol ester dehydrase-isomerase | F: PF07977 | ECOD (1.6) |
B | PF07977 | e1mkbB1 | A: a+b two layers | X: Thioesterase/thiol ester dehydrase-isomerase-like | H: Thioesterase/thiol ester dehydrase-isomerase (From Topology) | T: Thioesterase/thiol ester dehydrase-isomerase | F: PF07977 | ECOD (1.6) |
Domain Annotation: CATH CATH Database Homepage
Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
---|---|---|---|---|---|---|
A | 3.10.129.10 | Alpha Beta | Roll | Thiol Ester Dehydrase | Chain A | CATH (4.3.0) |
B | 3.10.129.10 | Alpha Beta | Roll | Thiol Ester Dehydrase | Chain A | CATH (4.3.0) |
Protein Family Annotation Pfam Database Homepage
Chains | Accession | Name | Description | Comments | Source |
---|---|---|---|---|---|
PF07977 | FabA-like domain (FabA) | FabA-like domain | This enzyme domain has a HotDog fold. | Domain |
Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage
InterPro: Protein Family Classification InterPro Database Homepage
Chains | Accession | Name | Type |
---|---|---|---|
IPR010083 | Beta-hydroxyacyl-(acyl-carrier-protein) dehydratase FabA | Family | |
IPR013114 | Beta-hydroxydecanoyl thiol ester dehydrase, FabA/FabZ | Family | |
IPR029069 | HotDog domain superfamily | Homologous Superfamily |
Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage
Chains | Enzyme Name | Description | Catalytic Residues |
---|---|---|---|
3-hydroxydecanoyl-[acyl-carrier-protein] dehydratase M-CSA #10 | In Escherichia coli, the enzyme beta-hydroxydecanoyl thiol ester dehydrase is responsible for the key step, where an unsaturated intermediate in the biosynthetic pathway of saturated fatty acids is intercepted and shunted into the pathway leading to unsaturated products. Dehydrase catalyses two reactions on fatty acid thiol esters of acyl carrier protein (ACP): the dehydration of (R)-3-hydroxydecanoyl-ACP to (E)-2-decenoyl-ACP, a reaction that also occurs in the elongation of saturated fatty acids; and the isomerization of (E)-2-decenoyl-ACP to (Z)-3-decenoyl-ACP. (E)-2-decenoyl-ACP can be reduced to decanoyl-ACP, which is elongated to the usual saturated fatty acids; in contrast, the cis (Z) double bond of (Z)-3-decenoyl-ACP is retained through the further cycles of fatty-acid elongation. The isomerisation catalysed by dehydrase is an allylic rearrangement, which is a relatively simple, single-substrate reaction. Both the dehydration and isomerization reactions seem to occur in the same active site. | Defined by 5 residues: HIS:A-70VAL:A-76GLY:A-79CYS:A-80ASP:B-84 | EC: 4.2.1.60 (PDB Primary Data) |