Entry
Name
3-dehydroquinate synthase II;
DHQ synthase II;
MJ1249 (gene name);
aroB' (gene name)
Class
Oxidoreductases;
Acting on the CH-NH2 group of donors;
With NAD+ or NADP+ as acceptor
BRITE hierarchy
Sysname
2-amino-3,7-dideoxy-D-threo-hept-6-ulosonate:NAD+ oxidoreductase (deaminating)
Reaction(IUBMB)
2-amino-3,7-dideoxy-D-threo-hept-6-ulosonate + H2O + NAD+ = 3-dehydroquinate + NH3 + NADH + H+ [RN:
R08569 ]
Reaction(KEGG)
Substrate
2-amino-3,7-dideoxy-D-threo-hept-6-ulosonate;
H2O [CPD:
C00001 ];
NAD+ [CPD:
C00003 ]
Product
Comment
The enzyme, which was isolated from the archaeon Methanocaldococcus jannaschii, plays a key role in an alternative pathway for the biosynthesis of 3-dehydroquinate (DHQ), an intermediate of the canonical pathway for the biosynthesis of aromatic amino acids. The enzyme catalyses a two-step reaction - an oxidative deamination, followed by cyclization.
History
EC 1.4.1.24 created 2012
Pathway
ec00400 Phenylalanine, tyrosine and tryptophan biosynthesis
ec01110 Biosynthesis of secondary metabolites
Orthology
K11646 3-dehydroquinate synthase II
Genes
MEHF : MmiHf6_11120(aroB')
MEES : MmiEs2_13760(aroB')
LOKI : Lokiarch_16770(aroB')
» show all
Taxonomy
Reference
Authors
White RH
Title
L-Aspartate semialdehyde and a 6-deoxy-5-ketohexose 1-phosphate are the precursors to the aromatic amino acids in Methanocaldococcus jannaschii.
Journal
Sequence
Other DBs
ExplorEnz - The Enzyme Database: 1.4.1.24
ExPASy - ENZYME nomenclature database: 1.4.1.24