home *** CD-ROM | disk | FTP | other *** search
- **************************************************
- * pfkB family of carbohydrate kinases signatures *
- **************************************************
-
- It has been shown [1,2,3] that the following carbohydrate kinases are
- evolutionary related and can be grouped into a single family, which is
- known [1] as the 'pfkB family':
-
- - Fructokinase (EC 2.7.1.4) (gene scrK).
- - 6-phosphofructokinase isozyme 2 (EC 2.7.1.11) (phosphofructokinase-2) (gene
- pfkB). pfkB is a minor phosphofructokinase isozyme in Escherichia coli and
- is not evolutionary related to the major isozyme (gene pfkA).
- - Ribokinase (EC 2.7.1.15) (gene rbsK).
- - 1-phosphofructokinase (EC 2.7.1.56) (fructose 1-phosphate kinase) (gene
- fruK).
- - Inosine-guanosine kinase (EC 2.7.1.73) (gene gsk).
- - Tagatose-6-phosphate kinase (EC 2.7.1.-) (phosphotagatokinase) (gene lacC).
- - Escherichia coli hypothetical protein yeiC.
- - Escherichia coli hypothetical protein yeiI.
- - Escherichia coli hypothetical protein yihV.
-
- All the above kinases are proteins of from 310 to 430 amino acid residues that
- share a few region of sequence similarity. We have selected two of these
- regions as signature patterns. The first pattern is based on a region rich
- in glycine which is located in the N-terminal section of these enzymes; while
- the second pattern is based on a conserved region in the C-terminal section.
-
- -Consensus pattern: [AG]-G-x(0,1)-[GP]-x-N-x-[STA]-x(6)-[GS]-x(9)-G
- -Sequences known to belong to this class detected by the pattern: ALL, except
- for inosine-guanosine kinase, yeast ribokinase, Zymomonas mobilis
- fructokinase and Escherichia coli yihV.
- -Other sequence(s) detected in SWISS-PROT: 6.
-
- -Consensus pattern: [DNS]-[PSTV]-x-[SAG](2)-[GD]-D-x(3)-[AG](2)-[LIVMF]-
- [LIVMSTA]
- -Sequences known to belong to this class detected by the pattern: ALL, except
- for Zymomonas mobilis fructokinase.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Expert(s) to contact by email: Reizer J.
- jreizer@ucsd.edu
-
- -Last update: June 1994 / Patterns and text revised.
-
- [ 1] Wu L.-F., Reizer A., Reizer J., Cai B., Tomich J.M., Saier M.H. Jr.
- J. Bacteriol. 173:3117-3127(1991).
- [ 2] Orchard L.M.D., Kornberg H.L.
- Proc. R. Soc. Lond., B, Biol. Sci. 242:87-90(1990).
- [ 3] Blatch G.L., Scholle R.R., Woods D.R.
- Gene 95:17-23(1990).
-