Function
The GLUT3 protein, encoded by the SLC2A3 gene in humans, found in mammalian cells, allows for the transport of the glucose molecule across the plasma membrane. It is especially prevalent in the axons of nerve cells in brain tissue. In neurons themselves, GLUT3 is the main glucose transporter that is utilized. In the human body, of the first four glucose transporters discovered (GLUT1, GLUT2, GLUT3, and GLUT4), GLUT3 has a higher glucose affinity and transport capacity, which facilitates its use in glucose transport in neurons. This is significant because the glucose levels surrounding the neuron are five times lower than those found in serum (blood). GLUT3 is also present in sperm, embryos, white blood cells and carcinoma cell lines.
Structure
The GLUT3 transport protein
Disease
Relevance
Structural highlights
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