Download MendeleyNMR Structure and Dynamics Studies of Yeast Respiratory Supercomplex Factor 2.
Zhou, S., Pettersson, P., Huang, J., Brzezinski, P., Pomes, R., Maler, L., Adelroth, P.(2021) Structure 29: 275
- PubMed: 32905793
- DOI: https://doi.org/10.1016/j.str.2020.08.008
- Primary Citation of Related Structures:
6LUL - PubMed Abstract:
The Saccharomyces cerevisiae respiratory supercomplex factor 2 (Rcf2) is a 224-residue protein located in the mitochondrial inner membrane where it is involved in the formation of supercomplexes composed of cytochrome bc 1 and cytochrome c oxidase. We previously demonstrated that Rcf2 forms a dimer in dodecylphosphocholine micelles, and here we report the solution NMR structure of this Rcf2 dimer. Each Rcf2 monomer has two soluble α helices and five putative transmembrane (TM) α helices, including an unexpectedly charged TM helix at the C terminus, which mediates dimer formation. The NOE contacts indicate the presence of inter-monomer salt bridges and hydrogen bonds at the dimer interface, which stabilize the Rcf2 dimer structure. Moreover, NMR chemical shift change mapping upon lipid titrations as well as molecular dynamics analysis reveal possible structural changes upon embedding Rcf2 into a native lipid environment. Our results contribute to the understanding of respiratory supercomplex formation and regulation.
Organizational Affiliation:
Department of Biochemistry and Biophysics, Stockholm University, 10691 Stockholm, Sweden; High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
