Trends Biochem Sci. 1992 May;17(5):197-201.

Complex regulation of simple sugar transport in insulin-responsive cells.

Czech MP, Clancy BM, Pessino A, Woon CW, Harrison SA.

Source

Program in Molecular Medicine, University of Massachusetts Medical Center, Worcester 01605.

Abstract

Facilitated sugar entry into mammalian cells is catalysed by multiple isoforms of the glucose transporter and regulated by hormonal stimuli, nutritional status and oncogenesis. A large reserve of latent glucose transport capacity must be maintained by muscle and adipose cells that are sensitive to insulin, the primary activator of sugar uptake after feeding. Intracellular sequestration of sugar transporters accounts for a large part of this latent capacity, but new findings suggest that there is also reversible suppression of intrinsic catalytic activity of those glucose transporters residing at the cell surface. The mechanism of this suppression appears to be occlusion or disruption of the exofacial sugar-binding sites on the glucose-transporter proteins.

PMID:: 1595129; [PubMed - indexed for MEDLINE]

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