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Expressed mostly in neurons (where it is believed to be the main glucose transporter isoform), and in the placenta. Is a high-affinity isoform, allowing it to transport even in times of low glucose concentrations. GLUT4: Expressed in adipose tissues and striated muscle (skeletal muscle and cardiac muscle). Is the insulin-regulated glucose ...
GLUT4 has a Km value for glucose of about 5 mM, which as stated above is the normal blood glucose level in healthy individuals. GLUT4 is the most abundant glucose transporter in skeletal muscle and is thus considered to be rate limiting for glucose uptake and metabolism in resting muscles. [8]
n/a Ensembl n/a n/a UniProt n a n/a RefSeq (mRNA) n/a n/a RefSeq (protein) n/a n/a Location (UCSC) n/a n/a PubMed search n/a n/a Wikidata View/Edit Human Glucose transporter 1 (or GLUT1), also known as solute carrier family 2, facilitated glucose transporter member 1 (SLC2A1), is a uniporter protein that in humans is encoded by the SLC2A1 gene. GLUT1 facilitates the transport of glucose across ...
GLUT1 is a named carrier protein found in almost all animal cell membranes that transports glucose across the bilayer. This protein is a uniporter, meaning it transports glucose along its concentration in a singular direction. It is an integral membrane protein carrier with a hydrophilic interior, which allows it to bind to glucose.
GLUT-1 is a glucose transporter present in most mammalian cells (Figure 5) (12). Its structure is nearly identical to that of GalP – possessing cytoplasmic amino and carboxy termini, twelve membrane spanning α helices, a periplasmic glycosylation site between helices 1 and 2, and a cytoplasmic α-helix loop between helices 6 and 7 (12).
Glucose transporter type 4 (GLUT4), also known as solute carrier family 2, facilitated glucose transporter member 4, is a protein encoded, in humans, by the SLC2A4 gene. GLUT4 is the insulin -regulated glucose transporter found primarily in adipose tissues and striated muscle (skeletal and cardiac).
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GLUT8, when expressed in Xenopus oocytes, mediates glucose uptake with high affinity. Other hexoses are not good substrates of the transporter. Mice devoid of both copies of the SLC2A8 gene are viable, fertile and do not show any obvious phenotype. [7] They are not diabetic, showing that GLUT8 is unlikely to play major roles in glucose homeostasis.