Defective SLC2A2 causes Fanconi-Bickel syndrome (FBS)

Stable Identifier
Homo sapiens
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The reversible facilitated diffusion of fructose, galactose, and glucose from the cytosol to the extracellular space is mediated by the SLC2A2 (GLUT2) transporter in the plasma membrane. In the epithelial cells of the small intestine, the basolateral localisation of SLC2A2 enables hexose sugars derived from the diet (and taken up by SLC5A1 and SLC2A5 transporters into cells) to be released into the circulation. SLC2A2 is a low affinity glucose transporter expressed mainly in the kidney, liver and pancreatic beta-cells. In beta-cells, it functions as a glucose-sensor for insulin secretion and in the liver, it allows for bi-directional glucose transport. Defects in SLC2A2 can cause Fanconi-Bickel syndrome (FBS; MIM:227810), a rare but well-defined disorder characterised by glycogen accumulation, proximal renal tubular dysfunction, and impaired utilisation of glucose and galactose (Leturque et al. 2009, Douard & Ferraris 2013).

Literature References
PubMed ID Title Journal Year
23129794 The role of fructose transporters in diseases linked to excessive fructose intake

Ferraris, RP, Douard, V

J. Physiol. (Lond.) 2013
19223655 GLUT2 mutations, translocation, and receptor function in diet sugar managing

Brot-Laroche, E, Leturque, A, Le Gall, M

Am. J. Physiol. Endocrinol. Metab. 2009
Name Identifier Synonyms
renal tubular transport disease DOID:447 inborn renal tubular transport disorder
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