Crystal structure of the human glucose transporter GLUT1. Author Dong Deng, Chao Xu, Pengcheng Sun, Jianping Wu, Chuangye Yan, Mingxu Hu, Nieng Yan Publication Year 2014 Type Journal Article Abstract The 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 Å 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. Keywords Structure-Activity Relationship, Humans, Models, Biological, Mutation, Models, Molecular, Ligands, Protein Structure, Tertiary, Crystallography, X-Ray, Escherichia coli Proteins, Glucose Transporter Type 1, Symporters, Monosaccharide Transport Proteins, Carbohydrate Metabolism, Inborn Errors Journal Nature Volume 510 Issue 7503 Pages 121-5 Date Published 2014 Jun 05 ISSN Number 1476-4687 DOI 10.1038/nature13306 Alternate Journal Nature PMID 24847886 PubMedGoogle ScholarBibTeXEndNote X3 XML