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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

A genetic and biochemical analysis of the role of gluconeogenesis in sporulation of Saccharomyces cerevisiae.

The requirement for gluconeogenesis and the pentose phosphate pathway in sporulation of Saccharomyces cerevisiae was investigated using homozygous diploids with mutations in selected portions of the respective metabolic pathways. Mutations affecting the genes FBA1 (fructose-1,6-bisphosphate aldolase), GPM1 (phosphoglycerate mutase) and ZWF1 (glucose-6-phosphate dehydrogenase) were used. Homozygous diploids bearing either fba1-11 or gpm1 mutations were asporogenous, indicating an absolute requirement for gluconeogenesis in sporulation. A strain homozygous for the zwf1 mutation sporulated, but at a reduced level compared to the wild-type. Homozygous spd1-1 mutations restored the ability to sporulate in fba1-11 homozygous diploids; this is believed to occur as a consequence of reduced NH+4 levels in spd1-1-bearing strains, the reduced intracellular NH+4 content serving to promote gluconeogenesis via the residual low levels of enzyme activity present in such mutants.[1]


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