Specific arrangement of three amino acid residues for flavin-binding barrel structures in NADH-cytochrome b5 reductase and the other flavin-dependent reductases.
[No authors listed]
摘要
The structure of NADH-cytochrome b5 reductase from pig liver microsomes has been refined to a crystallographic R factor of 0.223 at 2.4 A resolution. A structural comparison between the flavin-binding beta barrel domain of NADH-cytochrome b5 reductase and those of the other flavin-dependent reductases, ferredoxin-NADP+ reductase, phthalate dioxygenase reductase and nitrate reductase, indicated that the overall barrel foldings are similar to each other and that the specific arrangement of three amino acid residues (Arg, Tyr and Ser/Thr) is usually necessary for flavin-binding. These conserved residues overlap each other in their three-dimensional structures and stabilize the flavin-binding site in the four flavin-dependent reductases.
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基因功能
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原始数据
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文献解读
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