Any feedback?
Please rate this page

BRENDA support

show all | hide all No of entries

Information on EC - UDP-N-acetylglucosamine 4,6-dehydratase (configuration-inverting)

for references in articles please use BRENDA:EC4.2.1.115
Please wait a moment until all data is loaded. This message will disappear when all data is loaded.
EC Tree
IUBMB Comments
Contains NADP+ as a cofactor. This is the first enzyme in the biosynthetic pathway of pseudaminic acid , a sialic-acid-like sugar that is unique to bacteria and is used by Helicobacter pylori to modify its flagellin. This enzyme plays a critical role in H. pylori's pathogenesis, being involved in the synthesis of both functional flagella and lipopolysaccharides [1,2]. It is completely inhibited by UDP-alpha-D-galactose. The reaction results in the chirality of the C-5 atom being inverted. It is thought that Lys-133 acts sequentially as a catalytic acid, protonating the C-6 hydroxy group and as a catalytic base, abstracting the C-5 proton, resulting in the elimination of water. This enzyme belongs to the short-chain dehydrogenase/reductase family of enzymes.
Specify your search results
Select one or more organisms in this record: ?
Show additional data
Do not include text mining results
Include (text mining) results
Include results (AMENDA + additional results, but less precise)
Word Map
The enzyme appears in viruses and cellular organisms
flaa1, cj1293, hp0840, mg534, udp-n-acetylglucosamine 5-inverting 4,6-dehydratase, more
UDP-N-acetyl-alpha-D-glucosamine = UDP-2-acetamido-2,6-dideoxy-beta-L-arabino-hex-4-ulose + H2O
show the reaction diagram