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- **********************************************
- * cAMP phosphodiesterases class-II signature *
- **********************************************
-
- Cyclic AMP phosphodiesterase (EC 3.1.4.17) (cAMP-PDEase) catalyzes the
- hydrolysis of cAMP to the corresponding nucleoside 5' monophosphate. While
- most PDEases can be, on the basis of sequence similarities, grouped together
- [1], there are at least two enzymes which do not belong to the main family of
- PDEases and which represent a second class of these enzymes [2]:
-
- - Slime mold Dictyostelium discoideum extracellular cAMP PDEase. This enzyme
- plays an essential role in development by hydrolyzing the cAMP used as a
- chemoattractant by aggregating cells.
- - Budding yeast and Candida albicans low-affinity cAMP PDEase (gene PDE1).
- - Fission yeast probable cAMP PDEase (gene cgs2).
-
- There is, in the central part of these enzymes, a highly conserved region
- which contains three histidines. We have used this region as a signature
- pattern.
-
- -Consensus pattern: H-x-H-L-D-H-[LIVM]-x-[GS]-[LIVMA]-[LIVM](2)-x-S-[AP]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: June 1994 / Pattern and text revised.
-
- [ 1] Beavo J.A., Reifsnyder D.H.
- Trends Pharmacol. Sci. 11:150-155(1990).
- [ 2] Nikawa J.-I., Sass P., Wigler M.
- Mol. Cell. Biol. 7:3629-3636(1987).
-