Unusual features of the c-ring of F₁F_O ATP synthases.

ABSTRACT: Membrane integral ATP synthases produce adenosine triphosphate, the universal "energy currency" of most organisms. However, important details of proton driven energy conversion are still unknown. We present the first high-resolution structure (2.3 Å) of the in meso crystallized c-ring of 14 subunits from spinach chloroplasts. The structure reveals molecular mechanisms of intersubunit contacts in the c₁₄-ring, and it shows additional electron densities inside the c-ring which form circles parallel to the membrane plane. Similar densities were found in all known high-resolution structures of c-rings of F₁F_O ATP synthases from archaea and bacteria to eukaryotes. The densities might originate from isoprenoid quinones (such as coenzyme Q in mitochondria and plas

SUBMITTER: Vlasov AV 

PROVIDER: S-EPMC6897951 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature