5LQX

Structure of F-ATPase from Pichia angusta, state3

Summary for 5LQX

• Entry DOI: 10.2210/pdb5lqx/pdb
• EMDB information: 4100
• Descriptor: ATP synthase subunit f, ATP synthase inhibitor protein IF1, ATP synthase subunit c, ... (20 entities in total)
• Functional Keywords: atp synthase, hydrolase
• Biological source: Bos taurus (Bovine); More
• Total number of polymer chains: 30
• Total formula weight: 557790.55

Authors

Vinothkumar, K.R.,Montgomery, M.G.,Liu, S.,Walker, J.E. (deposition date: 2016-08-17, release date: 2016-11-16, Last modification date: 2024-05-15)

Primary citation

Vinothkumar, K.R.,Montgomery, M.G.,Liu, S.,Walker, J.E.
Structure of the mitochondrial ATP synthase fromPichia angustadetermined by electron cryo-microscopy.
Proc. Natl. Acad. Sci. U.S.A., 113:12709-12714, 2016

PubMed Abstract: The structure of the intact monomeric ATP synthase from the fungus, , has been solved by electron cryo-microscopy. The structure provides insights into the mechanical coupling of the transmembrane proton motive force across mitochondrial membranes in the synthesis of ATP. This mechanism requires a strong and integral stator, consisting of the catalytic αβ-domain, peripheral stalk, and, in the membrane domain, subunit a and associated supernumerary subunits, kept in contact with the rotor turning at speeds up to 350 Hz. The stator's integrity is ensured by robust attachment of both the oligomycin sensitivity conferral protein (OSCP) to the catalytic domain and the membrane domain of subunit b to subunit a. The ATP8 subunit provides an additional brace between the peripheral stalk and subunit a. At the junction between the OSCP and the apparently stiff, elongated α-helical b-subunit and associated d- and h-subunits, an elbow or joint allows the stator to bend to accommodate lateral movements during the activity of the catalytic domain. The stator may also apply lateral force to help keep the static a-subunit and rotating c-ring together. The interface between the c-ring and the a-subunit contains the transmembrane pathway for protons, and their passage across the membrane generates the turning of the rotor. The pathway has two half-channels containing conserved polar residues provided by a bundle of four α-helices inclined at ∼30° to the plane of the membrane, similar to those described in other species. The structure provides more insights into the workings of this amazing machine.

PubMed: 27791192
DOI: 10.1073/pnas.1615902113

Experimental method

ELECTRON MICROSCOPY (7.9 Å)