A1 Journal article – refereed
Cytochrome cbb3 of Thioalkalivibrio is a Na+-pumping cytochrome oxidase




List of Authors: Muntyan MS, Cherepanov DA, Malinen AM, Bloch DA, Sorokin DY, Severina II, Ivashina TV, Lahti R, Muyzer G, Skulachev VP
Publisher: NATL ACAD SCIENCES
Publication year: 2015
Journal: Proceedings of the National Academy of Sciences of the United States of America
Journal name in source: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Journal acronym: P NATL ACAD SCI USA
Volume number: 112
Issue number: 25
eISSN: 1091-6490

Abstract


Cytochrome c oxidases (Coxs) are the basic energy transducers in the respiratory chain of the majority of aerobic organisms. Coxs studied to date are redox-driven proton-pumping enzymes belonging to one of three subfamilies: A-, B-, and C-type oxidases. The C-type oxidases (cbb3 cytochromes), which are widespread among pathogenic bacteria, are the least understood. In particular, the proton-pumping machinery of these Coxs has not yet been elucidated despite the availability of X-ray structure information. Here, we report the discovery of the first (to our knowledge) sodium-pumping Cox (Scox), a cbb3 cytochrome from the extremely alkaliphilic bacterium Thioalkalivibrio versutus. This finding offers clues to the previously unknown structure of the ion-pumping channel in the C-type Coxs and provides insight into the functional properties of this enzyme.


Last updated on 2019-20-07 at 08:09