Lipid binding in rice nonspecific lipid transfer protein-1 complexes from Oryza sativa.
Nonspecific lipid transfer proteins (nsLTPs) facilitate the transfer of phospholipids, glycolipids, fatty acids and steroids between membranes, with wide-ranging binding affinities. Three crystal structures of rice nsLTP1 from Oryza sativa, complexed with myristic (MYR), palmitic (PAL) or stearic acid (STE) were determined. The overall structures of the rice nsLTP1 complexes belong to the four-helix bundle folding with a long C-terminal loop. The nsLTP1-MYR and the nsLTP1-STE complexes bind a single fatty acid while the nsLTP1-PAL complex binds two molecules of fatty acids. The C-terminal loop region is elastic in order to accommodate a diverse range of lipid molecules. The lipid molecules interact with the nsLTP1-binding cavity mainly with hydrophobic interactions. Significant conformational changes were observed in the binding cavity and the C-terminal loop of the rice nsLTP1 upon lipid binding.
Cheng
Hui-Chun
HC
Institute of Bioinformatics and Structural Biology, National Tsing Hua University, Hsinchu, Taiwan 300, Republic of China.
Cheng
Pei-Tsung
PT
Peng
Peiyu
P
Lyu
Ping-Chiang
PC
Sun
Yuh-Ju
YJ
D000595:Amino Acid Sequence; D001665:Binding Sites; D002352:Carrier Proteins / Q000737:chemistry* / Q000378:metabolism*; D018360:Crystallography, X-Ray; D057927:Hydrophobic and Hydrophilic Interactions; D050356:Lipid Metabolism; D046911:Macromolecular Substances / Q000737:chemistry / Q000378:metabolism; D008958:Models, Molecular; D008969:Molecular Sequence Data; D019814:Myristic Acid / Q000737:chemistry / Q000378:metabolism; D012275:Oryza / Q000737:chemistry*; D019308:Palmitic Acid / Q000737:chemistry / Q000378:metabolism; D011487:Protein Conformation; D013229:Stearic Acids / Q000737:chemistry / Q000378:metabolism; D014908:Triticum / Q000737:chemistry
D002352:Carrier Proteins; D046911:Macromolecular Substances; D013229:Stearic Acids; D019814:Myristic Acid; D019308:Palmitic Acid; C031183:stearic acid