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English Wikipedia
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Glycolipid transfer proteins Brown RE; Mattjus PBiochim Biophys Acta 2007[Jun]; 1771 (6): 746-60Glycolipid transfer proteins (GLTPs) are small (24 kDa), soluble, ubiquitous proteins characterized by their ability to accelerate the intermembrane transfer of glycolipids in vitro. GLTP specificity encompasses both sphingoid- and glycerol-based glycolipids, but with a strict requirement that the initial sugar residue be beta-linked to the hydrophobic lipid backbone. The 3D architecture of GLTP reveals liganded structures with unique lipid-binding modes. The biochemical properties of GLTP action at the membrane surface have been studied rather comprehensively, but the biological role of GLTP remains enigmatic. What is clear is that GLTP differs distinctly from other known glycolipid-binding proteins, such as nonspecific lipid transfer proteins, lysosomal sphingolipid activator proteins, lectins, lung surfactant proteins as well as other lipid-binding/transfer proteins. Based on the unique conformational architecture that targets GLTP to membranes and enables glycolipid binding, GLTP is now considered the prototypical and founding member of a new protein superfamily in eukaryotes.|Animals[MESH]|Binding Sites[MESH]|Carrier Proteins/chemistry/*metabolism[MESH]|Cattle[MESH]|Crystallography, X-Ray[MESH]|Glycolipids/*metabolism[MESH]|Humans[MESH]|Lactosylceramides/chemistry[MESH]|Lipid Bilayers/*chemistry/*metabolism[MESH]|Models, Chemical[MESH]|Models, Molecular[MESH]|Protein Conformation[MESH]|Structure-Activity Relationship[MESH] |
