home *** CD-ROM | disk | FTP | other *** search
- ***************************************
- * Phosphoglucose isomerase signatures *
- ***************************************
-
- Phosphoglucose isomerase (EC 5.3.1.9) (PGI) [1,2] is a dimeric enzyme that
- catalyzes the reversible isomerization of glucose-6-phosphate and fructose-6-
- phosphate. PGI is involved in different pathways: in most higher organisms it
- is involved in glycolysis; in mammals it is involved in gluconeogenesis; in
- plants in carbohydrate biosynthesis; in some bacteria it provides a gateway
- for fructose into the Entner-Doudouroff pathway. PGI has been shown [3] to be
- identical to neuroleukin, a neurotrophic factor which supports the survival of
- various types of neurons.
-
- The sequence of PGI from many species ranging from bacteria to mammals is
- available and has been shown to be highly conserved. As signature patterns for
- this enzyme we selected two conserved regions, the first region is located in
- the central section of PGI, while the second one is located in its C-terminal
- section.
-
- -Consensus pattern: [LIVM]-G-G-R-[FY]-S-[LIVM]-x-[STA](2)-[LIVM]-G
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Consensus pattern: [FY]-D-Q-x-G-V-E-x(2)-K
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Last update: December 1992 / Patterns and text revised.
-
- [ 1] Achari A., Marshall S.E., Muirhewad H., Palmieri R.H., Noltmann E.A.
- Phil. Trans. R. Soc. London B 293:145-157(1981).
- [ 2] Smith M.W., Doolittle R.F.
- J. Mol. Evol. 34:544-545(1992).
- [ 3] Faik P., Walker J.I.H., Redmill A.A.M., Morgan M.J.
- Nature 332:455-456(1988).
-