Crystal Structure of oxidized NuoEF variant P228R(NuoF) from Aquifex aeolicus

Structural robustness of the NADH binding site in NADH:ubiquinone oxidoreductase (complex I).

The sequence AGHHHHHH is a C-terminal affinity tag used for the affinity purification of the NuoEF complex

NADH dehydrogenase I subunit E,NDH-1 subunit E

NADH dehydrogenase I subunit F,NDH-1 subunit F

MFKTEFEFPEELKTKLQEHINYFPKKRQAILLCLHEIQNYYGYIPPESLKPLADMLELPLNHVEGVVAFYDMFDREDKAK
YRIRVCVSIVCHLMGTNKLLKALENILGIKPGEVTPDGKFKIVPVQCLGACSEAPVFMVNDDEYKFESEVQLNEILSRYT

MRSYPAIPRIYAETTLNMLLKRAKKPRVHSIDEYLKDGGYQALEKALNMSPEEIIDWVDKSTLRGRGGAGFPTGKKWKFA
VQNPGPRYFICNADESEPGTFKDRIIIERDPHLLIEGIIISSYAIGANEAYIYIRGEYPAGYYILRDAIEEAKKKGFLGK
NILGSGFDLEIYVARGAGAYICGEETALIESLEGKRGHPRLKPPYPVQKGLWGKPTVVNNVETIANVRFIISMGWEEYRY
IGPSDYAGPKLFPVSGKVKKPGVYELPMNTTLREVIFKYAGGTLGNKKVKAVFSGALDCFSSEELDIPMDYSPLGFGGTG
TVIVLTEEDDIVEAALKIAEFYEHETCGQCTPCRVGCYEQANLLEKIYKGEATEQDWEGFDFVNRNIQPTSICGLGAVAG
RLIRQTLEKFPEEWEKYRKKSASLPLAGHHHHHH

100 mM BisTris pH 6.3, 1.65 M ammonium sulfate, 150 mM NaCl

9FDK contains the R66G variant of NuoF at same oxidation state

Chains A and B were used as ensemble, which was placed two times to fill the asymmetric unit

Dimerization of NuoEF to a (NuoEF)2 heterotetramer is the stable assembly in solution

Hydrogens have been added in their riding positions

Complex I, respiratory chain, NADH-ubiquinone oxidoreductase, bioenergetics, ELECTRON TRANSPORT

MRSYPAIPRIYAETTLNMLLKRAKKPRVHSIDEYLKDGGYQALEKALNMSPEEIIDWVDKSTLRGRGGAGFPTGKKWKFA
VQNPGPRYFICNADESEPGTFKDRIIIERDPHLLIEGIIISSYAIGANEAYIYIRGEYPAGYYILRDAIEEAKKKGFLGK
NILGSGFDLEIYVARGAGAYICGEETALIESLEGKRGHPRLKPPYPVQKGLWGKPTVVNNVETIANVPFIISMGWEEYRY
IGPSDYAGPKLFPVSGKVKKPGVYELPMNTTLREVIFKYAGGTLGNKKVKAVFSGALDCFSSEELDIPMDYSPLGFGGTG
TVIVLTEEDDIVEAALKIAEFYEHETCGQCTPCRVGCYEQANLLEKIYKGEATEQDWEGFDFVNRNIQPTSICGLGAVAG
RLIRQTLEKFPEEWEKYRKKSASLPL