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Control of growth and differentiation by cyclic AMP in fungi

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Abstract

InSaccharomyces cerivisiae intracellular cAMP mediates environmental signals that regulate cellular metabolism and growth. The studies on the cAMP-requiring mutants and their suppressors in the yeast revealed that cAMP-dependent protein phosphorylation is involved in the G1 phase of the cell cycle, stimulation of the phosphoinositide pathway and the post-meiotic stage of spourlation, and that inhibition of cAMP-dependent protein phosphorylation is required to go into the GO stage of and to induce meiotic division. Growth of some filamentous fungi was observed with significantly reduced levels of cAMP, suggesting that cAMP may not be essential for growth in some species of fungi. Germination of fungal spores, yeast-mycelium dimorphism and hyphal morphogenesis of several species of fungi were affected by cAMP. cAMP was involved in extension of hyphae, formation of hyphal aggregates and fruit body formation. Phosphorylation of cellular proteins is required in these processes, and the nature of these proteins phosphorylated by cAMP-dependent protein kinase is important to the understanding of the role of cAMP for growth and differentistion in fungal cells.

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    Tatsuo Ishikawa

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Ishikawa, T. Control of growth and differentiation by cyclic AMP in fungi. Bot. Mag. Tokyo 102, 471–490 (1989). https://doi.org/10.1007/BF02488129

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