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PROSITE documentation PDOC00789 [for PROSITE entry PS01029]

Dehydroquinase class II signature


3-dehydroquinate dehydratase (EC, or dehydroquinase, catalyzes the conversion of 3-dehydroquinate into 3-dehydroshikimate. It is the third step in the shikimate pathway for the biosynthesis of aromatic amino acids from chorismate. Two classes of dehydroquinases exist, known as types I and II. Class-II enzymes are homododecameric enzymes of about 17 Kd. They are found in some bacteria such as actinomycetales [1,2] and some fungi where they act in a catabolic pathway that allows the use of quinic acid as a carbon source. As a signature pattern, we selected a conserved region in the N-terminal section.

Last update:

December 2004 / Pattern and text revised.

Technical section

PROSITE method (with tools and information) covered by this documentation:

DEHYDROQUINASE_II, PS01029; Dehydroquinase class II signature  (PATTERN)


1AuthorsGarbe T. Servos S. Hawkins A. Dimitriadis G. Young D. Dougan G. Charles I.
TitleThe Mycobacterium tuberculosis shikimate pathway genes: evolutionary relationship between biosynthetic and catabolic 3-dehydroquinases.
SourceMol. Gen. Genet. 228:385-392(1991).
PubMed ID1910148

2AuthorsLalonde G. O'Hanley P.D. Stocker B.A.D. Denich K.T.
TitleCharacterization of a 3-dehydroquinase gene from Actinobacillus pleuropneumoniae with homology to the eukaryotic genes qa-2 and QUTE.
SourceMol. Microbiol. 11:273-280(1994).
PubMed ID8170389

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