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A model of the monosaccharide uphill transporting cell membrane system in yeast

1971; Elsevier BV; Volume: 33; Issue: 3 Linguagem: Inglês

10.1016/0022-5193(71)90099-3

1095-8541

M. Höfer,

Food composition and properties

This chapter summarizes the general mechanisms of sugar transport along with a detailed account of kinetic studies and mode of energy coupling of pentose uptake in various bacterial and yeast strains. Regulation of pentose uptake in both bacteria and yeasts has been critically evaluated, especially in the presence of other carbohydrates. In addition, genetic analyses of pentose uptake have been overviewed in order to provide insights into the molecular mechanisms underlying pentose uptake and regulation in pentose fermenting micro-organisms. It is evident that the early studies of pentose uptake addressed the queries regarding the mechanism of sugar transport in bacteria and yeasts. Most of the studies employed E. coil and Rhodotorula glutinis as model organisms. Later the presence of large amounts of pentose sugars in lignocellulosic waste attracted considerable interest in microbial utilization of pentose sugars along with other hexoses for the production of liquid fuel from renewable biomass. The understanding of regulatory mechanisms of pentose uptake in the presence of other sugars at the molecular level is likely to help in improvement of strains for the preferential utilization of pentoses from complex mixture of sugars.