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PDOC00460
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1995-07-26
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*****************************************************
* Phosphoenolpyruvate carboxykinase (ATP) signature *
*****************************************************
Phosphoenolpyruvate carboxykinase (ATP) (EC 4.1.1.49) (PEPCK) [1] catalyzes
the formation of phosphoenolpyruvate by decarboxylation of oxaloacetate while
hydrolyzing ATP, a rate limiting step in gluconeogenesis (the biosynthesis of
glucose).
The sequence of this enzyme has been obtained from Escherichia coli, yeast,
and Trypanosoma brucei; these three sequences are evolutionary related and
share many regions of similarity. As a signature pattern we selected a highly
conserved region that contains four acidic residues and which is located in
the central part of the enzyme. The beginning of the pattern is located about
10 residues to the C-terminus of a putative ATP-binding site.
-Consensus pattern: L-I-G-D-D-E-H-x-W-x-D-x-G-V-F-N
-Sequences known to belong to this class detected by the pattern: ALL.
-Other sequence(s) detected in SWISS-PROT: NONE.
-Note: phosphoenolpyruvate carboxykinase (GTP) (EC 4.1.1.32) an enzyme that
catalyzes the same reaction, but using GTP instead of ATP, is not related to
the above enzyme (see the relevant section).
-Last update: December 1991 / First entry.
[ 1] Medina V., Pontarollo R., Glaeske D., Tabel H., Goldie H.
J. Bacteriol. 172:7151-7156(1990).