Null mutations of the Dictyostelium cyclic nucleotide phosphodiesterase gene block chemotactic cell movement in developing aggregates.

Abstract excerpt

Extracellular cAMP is a critical messenger in the multicellular development of the cellular slime mold Dictyostelium discoideum. The levels of cAMP are controlled by a cyclic nucleotide phosphodiesterase (PDE) that is secreted by the cells. The PDE gene (pdsA) is controlled by three promoters that permit expression during vegetative growth, during aggregation, and in prestalk cells of the older structures....

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