CATH Classification

Domain Context

CATH Clusters

Superfamily 3.40.50.20
Functional Family

Enzyme Information

6.3.4.18
5-(carboxyamino)imidazole ribonucleotide synthase.
based on mapping to UniProt O66608
ATP + 5-amino-1-(5-phospho-D-ribosyl)imidazole + HCO(3)(-) = ADP + phosphate + 5-carboxyamino-1-(5-phospho-D-ribosyl)imidazole.
-!- In Escherichia coli, this enzyme, along with EC 5.4.99.18, is required to carry out the single reaction catalyzed by EC 4.1.1.21 in vertebrates. -!- Carboxyphosphate is the putative acyl phosphate intermediate. -!- Involved in the late stages of purine biosynthesis.

UniProtKB Entries (1)

O66608
PURK_AQUAE
Aquifex aeolicus VF5
N5-carboxyaminoimidazole ribonucleotide synthase

PDB Structure

PDB 2Z04
External Links
Method X-RAY DIFFRACTION
Organism Escherichia
Primary Citation
Crystal structure of phosphoribosylaminoimidazole carboxylase ATPase subunit from Aquifex aeolicus
Okada, K., Tamura, S., Baba, S., Kanagawa, M., Kawai, G., Sampei, G.
To be Published