Reconstitution of the Cytb5-CytP450 Complex in Nanodiscs for Structural Studies using NMR Spectroscopy.
Angew Chem Int Ed Engl
; 55(14): 4497-9, 2016 Mar 24.
Article
em En
| MEDLINE
| ID: mdl-26924779
ABSTRACT
Cytochromeâ
P450s (P450s) are a superfamily of enzymes responsible for the catalysis of a wide range of substrates. Dynamic interactions between full-length membrane-bound P450 and its redox partner cytochromeâ
b5 (cytb5 ) have been found to be important for the enzymatic activity of P450. However, the stability of the circa 70â
kDa membrane-bound complex in model membranes renders high-resolution structural NMR studies particularly difficult. To overcome these challenges, reconstitution of the P450-cytb5 complex in peptide-based nanodiscs, containing no detergents, has been demonstrated, which are characterized by size exclusion chromatography and NMR spectroscopy. In addition, NMR experiments are used to identify the binding interface of the P450-cytb5 complex in the nanodisc. This is the first successful demonstration of a protein-protein complex in a nanodisc using NMR structural studies and should be useful to obtain valuable structural information on membrane-bound protein complexes.
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Base de dados:
MEDLINE
Assunto principal:
Espectroscopia de Ressonância Magnética
/
Citocromos b5
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Sistema Enzimático do Citocromo P-450
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Nanoestruturas
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article