CATH Domain 3bp1A02

CATH Classification

Level	CATH Code	Description
	3	Alpha Beta
	3.30	2-Layer Sandwich
	3.30.1130	GTP Cyclohydrolase I, domain 2
	3.30.1130.10	GTP cyclohydrolase I, C-terminal domain/NADPH-dependent 7-cyano-7-deazaguanine reductase, N-terminal domain

Domain Context

CATH Clusters

Superfamily	3.30.1130.10
Functional Family

Enzyme Information

1.7.1.13

PreQ(1) synthase.

based on mapping to UniProt Q9KTK0

7-aminomethyl-7-carbaguanine + 2 NADP(+) = 7-cyano-7-carbaguanine + 2 NADPH.

-!- The reaction occurs in the reverse direction. -!- This enzyme catalyzes one of the early steps in the synthesis of queosine (Q-tRNA), and is followed by the action of EC 2.4.2.29. -!- Queosine is found in the wobble position of tRNA(GUN) in eukaryotes and bacteria and is thought to be involved in translational modulation.

UniProtKB Entries (1)

Q9KTK0

QUEF_VIBCH

Vibrio cholerae O1 biovar El Tor str. N16961

NADPH-dependent 7-cyano-7-deazaguanine reductase

PDB Structure

PDB	3BP1
External Links	PDBSum Proteopedia
Method	X-RAY DIFFRACTION
Organism	Escherichia
Primary Citation	High-resolution structure of the nitrile reductase QueF combined with molecular simulations provide insight into enzyme mechanism. Kim, Y., Zhou, M., Moy, S., Morales, J., Cunningham, M.A., Joachimiak, A. J.Mol.Biol.