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- *************************************
- * Thymidine phosphorylase signature *
- *************************************
-
- Thymidine phosphorylase (EC 2.4.2.4) catalyzes the reversible phosphorolysis
- of thymidine, deoxyuridine and their analogues to their respective bases and
- 2-deoxyribose 1-phosphate. This enzyme regulates the availability of thymidine
- and is therefore essential to nucleic acid metabolism.
-
- In Escherichia coli (gene deoA) the enzyme is a dimer of identical subunits
- of about 48 Kd [1]; in Human it has first been identified as platelet-derived
- endothelial cell growth factor (PD-ECGF) before being recognized [2] as
- thymidine phosphorylase.
-
- The similarity between the sequences of the bacterial and the mammalian enzyme
- is very high. As a signature pattern we selected a perfectly conserved stretch
- of 24 residues located in the N-terminal part of these proteins.
-
- -Consensus pattern: P-M-I-S-G-R-G-L-G-H-T-G-G-T-L-D-K-L-E-S-I-P-G-F
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: June 1992 / First entry.
-
- [ 1] Walter M.R., Cook W.J., Cole L.B., Short S.A., Koszalka G.W.,
- Krenitsky T.A., Ealick S.E.
- J. Biol. Chem. 265:14016-14022(1990).
- [ 2] Furukawa T., Yoshimura A., Sumizawa T., Haraguchi M., Akiyama S.-I.,
- Fukui K., Yamada Y.
- Nature 356:668-668(1992).
-