CATH Domain 1h7nA00

CATH Classification

Level	CATH Code	Description
	3	Alpha Beta
	3.20	Alpha-Beta Barrel
	3.20.20	TIM Barrel
	3.20.20.70	Aldolase class I

Domain Context

CATH Clusters

Superfamily	Aldolase class I
Functional Family	Delta-aminolevulinic acid dehydratase

Enzyme Information

4.2.1.24

Porphobilinogen synthase.

based on mapping to UniProt P05373

2 5-aminolevulinate = porphobilinogen + 2 H(2)O.

-!- The enzyme catalyzes the asymmetric condensation and cyclization of two 5-aminolevulinate molecules, which is the first common step in the biosynthesis of tetrapyrrole pigments such as porphyrin, chlorophyll, vitamin B12, siroheme, phycobilin, and cofactor F430. -!- The enzyme is widespread, being essential in organisms that carry out respiration, photosynthesis, or methanogenesis. -!- In humans, the enzyme is a primary target for the environmental toxin Pb. -!- The enzymes from some organisms utilize a dynamic equilibrium between architecturally distinct multimeric assemblies as a means for allosteric regulation.

UniProtKB Entries (1)

P05373

HEM2_YEAST

Saccharomyces cerevisiae S288C

Delta-aminolevulinic acid dehydratase

PDB Structure

PDB	1H7N
External Links	PDBSum Proteopedia
Method	X-RAY DIFFRACTION
Organism
Primary Citation	The X-Ray Structure of Yeast 5-Aminolaevulinic Acid Dehydratase Complexed with Substrate and Three Inhibitors Erskine, P.T., Newbold, R., Brindley, A.A., Wood, S.P., Shoolingin-Jordan, P.M., Warren, M.J., Cooper, J.B. J.Mol.Biol.