9FDJ

Crystal structure of the NuoEF variant R66G (NuoF) from Aquifex aeolicus bound to NADH under anoxic conditions (short soak)

9FDJ の概要

• エントリーDOI: 10.2210/pdb9fdj/pdb
• 分子名称: NADH-quinone oxidoreductase subunit E, SODIUM ION, NADH-quinone oxidoreductase subunit F, ... (11 entities in total)
• 機能のキーワード: complex i, respiratory chain, nadh-ubiquinone oxidoreductase, bioenergetics, electron transport
• 由来する生物種: Aquifex aeolicus VF5; 詳細
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 138570.47

構造登録者

Wohlwend, D.,Friedrich, T.,Goeppert-Asadollahpour, S. (登録日: 2024-05-17, 公開日: 2024-07-17)

主引用文献

Goppert-Asadollahpour, S.,Wohlwend, D.,Friedrich, T.
Structural robustness of the NADH binding site in NADH:ubiquinone oxidoreductase (complex I).
Biochim Biophys Acta Bioenerg, 1865:149491-149491, 2024

PubMed Abstract: Energy converting NADH:ubiquinone oxidoreductase, complex I, is the first enzyme of respiratory chains in most eukaryotes and many bacteria. Mutations in genes encoding subunits of human complex I may lead to its dysfunction resulting in a diverse clinical pattern. The effect of mutations on the protein structure is not known. Here, we focus on mutations R88G, E246K, P252R and E377K that are found in subunit NDUFV1 comprising the NADH binding site of complex I. Homologous mutations were introduced into subunit NuoF of Aquifex aeolicus complex I and it was attempted to crystallize variants of the electron input module, NuoEF, with bound substrates in the oxidized and reduced state. The E377K variant did not form crystals most likely due to an improper protein assembly. The architecture of the NADH binding site is hardly affected by the other mutations indicating its unexpected structural robustness. The R88G, E246K and P252R mutations led to small local structural rearrangements that might be related to their pathogenicity. These minor structural changes involve substrate binding, product release and the putative formation of reactive oxygen species. The structural consequences of the mutations as obtained with the bacterial enzyme might thus help to contribute to the understanding of disease causing mutations.

PubMed: 38960077
DOI: 10.1016/j.bbabio.2024.149491

実験手法

X-RAY DIFFRACTION (1.7 Å)