4pyp
From Proteopedia
Crystal structure of the human glucose transporter GLUT1
Structural highlights
Disease[GTR1_HUMAN] Hereditary cryohydrocytosis with reduced stomatin;Paroxysmal exertion-induced dyskinesia;Encephalopathy due to GLUT1 deficiency;Paroxysmal dystonic choreathetosis with episodic ataxia and spasticity;Childhood absence epilepsy;Epilepsy with myoclonic-astatic seizures. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. Function[GTR1_HUMAN] Facilitative glucose transporter. This isoform may be responsible for constitutive or basal glucose uptake. Has a very broad substrate specificity; can transport a wide range of aldoses including both pentoses and hexoses. Publication Abstract from PubMedThe glucose transporter GLUT1 catalyses facilitative diffusion of glucose into erythrocytes and is responsible for glucose supply to the brain and other organs. Dysfunctional mutations may lead to GLUT1 deficiency syndrome, whereas overexpression of GLUT1 is a prognostic indicator for cancer. Despite decades of investigation, the structure of GLUT1 remains unknown. Here we report the crystal structure of human GLUT1 at 3.2 A resolution. The full-length protein, which has a canonical major facilitator superfamily fold, is captured in an inward-open conformation. This structure allows accurate mapping and potential mechanistic interpretation of disease-associated mutations in GLUT1. Structure-based analysis of these mutations provides an insight into the alternating access mechanism of GLUT1 and other members of the sugar porter subfamily. Structural comparison of the uniporter GLUT1 with its bacterial homologue XylE, a proton-coupled xylose symporter, allows examination of the transport mechanisms of both passive facilitators and active transporters. Crystal structure of the human glucose transporter GLUT1.,Deng D, Xu C, Sun P, Wu J, Yan C, Hu M, Yan N Nature. 2014 Jun 5;510(7503):121-5. doi: 10.1038/nature13306. Epub 2014 May 18. PMID:24847886[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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Categories: Deng, D | Hu, M X | Sun, P C | Wu, J P | Xu, C | Yan, C Y | Yan, N | Glycosylation | Helix | Membrane transporter | Transport protein
