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- **********************************
- * Chorismate synthase signatures *
- **********************************
-
- Chorismate synthase (EC 4.6.1.4) catalyzes the last of the seven steps in the
- shikimate pathway which is used in prokaryotes, fungi, and plants for the
- biosynthesis of aromatic amino acids. Chorismate synthase catalyzes the 1,4-
- trans elimination of the phosphate group from 5-enolpyruvylshikimate-3-
- phosphate (EPSP) to form chorismate which can then be used in the biosynthesis
- of phenylalanine, tyrosine, or tryptophan. Chorismate synthase requires the
- presence of a reduced flavin mononucleotide (FMNH2 or FADH2) for its activity.
-
- Chorismate synthase from various sources shows [1,2] a high degree of sequence
- conservation; it is a protein of about 360 to 400 amino acid residues. We have
- developed three signature patterns from conserved regions rich in basic
- residues (mostly arginines). The first pattern is located in the N-terminal
- section, the second one is central, and the third one is C-terminal.
-
- -Consensus pattern: [DE]-[LIVM]-Q-x(2)-L-x-R(3)-P-G-x-S-[KR]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: G(3)-R-[SA](3)-R-E-T
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: G-R-H-D-P-x-V-x(2)-R-A-[LIVM]-P
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Last update: December 1992 / First entry.
-
- [ 1] Schaller A., Schmid J., Leibinger U., Amrhein N.
- J. Biol. Chem. 266:21434-21438(1991).
- [ 2] Jones D.G.L., Reusser U., Braus G.H.
- Mol. Microbiol. 5:2143-2152(1991).
-