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- *******************************************************
- * 3'5'-cyclic nucleotide phosphodiesterases signature *
- *******************************************************
-
- 3'5'-cyclic nucleotide phosphodiesterases (EC 3.1.4.17) (PDEases) catalyze the
- hydrolysis of cAMP or cGMP to the corresponding nucleoside 5' monophosphates
- [1]. There are at least five different forms of PDEases [2]:
-
- - Type 1, calmodulin/calcium-dependent PDEases.
- - Type 2, cGMP-stimulated PDEases.
- - Type 3, cGMP-inhibited PDEases.
- - Type 4, cAMP-specific PDEases.
- - Type 5, cGMP-specific PDEases.
-
- All of these forms seem to share a conserved domain of about 270 residues. We
- have derived a signature pattern from a stretch of 12 residues that contains
- two conserved histidines.
-
- -Consensus pattern: H-D-[LIVMFY]-x-H-x-[AG]-x(2)-N-x-[LIVMFY]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
-
- -Note: slime mold extracellular PDEase and yeast low-affinity PDEase (gene
- PDE1) do not show any similarity with the above enzymes and belong to another
- class of PDEases (see the relevant section).
-
- -Last update: December 1991 / Text revised.
-
- [ 1] Charbonneau H., Beier N., Walsh K.A., Beavo J.A.
- Proc. Natl. Acad. Sci. U.S.A. 83:9308-9312(1986).
- [ 2] Beavo J.A., Reifsnyder D.H.
- Trends Pharmacol. Sci. 11:150-155(1990).
-