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- ****************************
- * EPSP synthase signatures *
- ****************************
-
- EPSP synthase (3-phosphoshikimate 1-carboxyvinyltransferase) (EC 2.5.1.19)
- catalyzes the sixth step in the biosynthesis from chorismate of the aromatic
- amino acids (the shikimate pathway) in bacteria (gene aroA), plants and fungi
- (where it is part of a multifunctional enzyme which catalyzes five consecutive
- steps in this pathway) [1]. EPSP synthase has been extensively studied as it
- is the target of the potent herbicide glyphosate which inhibits the enzyme.
-
- The sequence of EPSP from various biological sources shows that the structure
- of the enzyme has been well conserved throughout evolution. We selected two
- conserved regions as signature patterns. The first pattern corresponds to a
- region that is part of the active site and which is also important for the
- resistance to glyphosate [2]. The second pattern is located in the C-terminal
- part of the protein and contains a conserved lysine which seems to be
- important for the activity of the enzyme.
-
- -Consensus pattern: [LIVM]-x(2)-G-N-[SA]-G-T-[AT]-x-R-x-[LIVM]-x-[GSTA]
- -Sequences known to belong to this class detected by the pattern: ALL, except
- for Mycobacterium tuberculosis aroA.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: [KR]-x-[KH]-E-[CT]-[DNE]-R-[LIVM]-x-[STA]-[LIVM]-x(2)-E-
- [LIVM]-x-[KR]-[LIVMF]-G
- -Sequences known to belong to this class detected by the pattern: ALL, except
- for Staphylococcus aureus aroA.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Last update: June 1994 / Text revised.
-
- [ 1] Stallings W.C., Abdel-Megid S.S., Lim L.W., Shieh H.-S., Dayringer H.E.,
- Leimgruber N.K., Stegeman R.A., Anderson K.S., Sikorski J.A.,
- Padgette S.R., Kishore G.M.
- Proc. Natl. Acad. Sci. U.S.A. 88:5046-5050(1991).
- [ 2] Padgette S.R., Re D.B., Gaser C.S., Eicholtz D.A., Frazier R.B.,
- Hironaka C.M., Levine E.B., Shah D.M., Fraley R.T., Kishore G.M.
- J. Biol. Chem. 266:22364-22369(1991).
-