CATH Classification
| Level | CATH Code | Description |
|---|---|---|
|
3 | Alpha Beta |
|
3.40 | 3-Layer(aba) Sandwich |
|
3.40.47 | Peroxisomal Thiolase; Chain A, domain 1 |
|
3.40.47.10 | Thiolase/Chalcone synthase |
Domain Context
CATH Clusters
| Superfamily | 3.40.47.10 |
| Functional Family | 3-oxoacyl-[acyl-carrier-protein] synthase 3 |
Enzyme Information
| 2.3.1.180 |
Beta-ketoacyl-[acyl-carrier-protein] synthase III.
based on mapping to UniProt P43711
Acetyl-CoA + malonyl-[acyl-carrier-protein] = acetoacetyl-[acyl-carrier- protein] + CoA + CO(2).
-!- Involved in the dissociated (or type II) fatty-acid biosynthesis system that occurs in plants and bacteria. -!- In contrast to EC 2.3.1.41 and EC 2.3.1.179, this enzyme specifically uses CoA thioesters rather than acyl-ACP as the primer. -!- In addition to the above reaction, the enzyme can also catalyze the reaction of EC 2.3.1.38, but to a much lesser extent. -!- Responsible for initiating both straight- and branched-chain fatty- acid biosynthesis, with the substrate specificity in an organism reflecting the fatty-acid composition found in that organism. -!- For example, Streptococcus pneumoniae, a Gram-positive bacterium, is able to use both straight- and branched-chain (C4--C6) acyl-CoA primers whereas Escherichia coli, a Gram-negative organism, uses primarily short straight-chain acyl CoAs, with a preference for acetyl-CoA.
|
UniProtKB Entries (1)
| P43711 |
FABH_HAEIN
Haemophilus influenzae Rd KW20
3-oxoacyl-[acyl-carrier-protein] synthase 3
|
PDB Structure
| PDB | 3IL3 |
| External Links | |
| Method | X-RAY DIFFRACTION |
| Organism | |
| Primary Citation |
Crystal structures of bacterial FabH suggest a molecular basis for the substrate specificity of the enzyme.
Febs Lett.
|
