8FL8

Yeast ATP Synthase structure in presence of MgATP

Summary for 8FL8

• Entry DOI: 10.2210/pdb8fl8/pdb
• EMDB information: 29270 29278
• Descriptor: ATP synthase protein 8, ATP synthase subunit a, ATP synthase subunit 4, mitochondrial, ... (17 entities in total)
• Functional Keywords: f-type, atp synthase, yeast, mitochondrial, membrane protein
• Biological source: Saccharomyces cerevisiae (baker's yeast); More
• Total number of polymer chains: 27
• Total formula weight: 554731.31

Authors

Sharma, S.,Patel, H.,Luo, M.,Mueller, D.M.,Liao, M. (deposition date: 2022-12-21, release date: 2024-01-17, Last modification date: 2024-05-01)

Primary citation

Sharma, S.,Luo, M.,Patel, H.,Mueller, D.M.,Liao, M.
Conformational ensemble of yeast ATP synthase at low pH reveals unique intermediates and plasticity in F 1 -F o coupling.
Nat.Struct.Mol.Biol., 31:657-666, 2024

PubMed Abstract: Mitochondrial adenosine triphosphate (ATP) synthase uses the proton gradient across the inner mitochondrial membrane to synthesize ATP. Structural and single molecule studies conducted mostly at neutral or basic pH have provided details of the reaction mechanism of ATP synthesis. However, pH of the mitochondrial matrix is slightly acidic during hypoxia and pH-dependent conformational changes in the ATP synthase have been reported. Here we use single-particle cryo-EM to analyze the conformational ensemble of the yeast (Saccharomyces cerevisiae) ATP synthase at pH 6. Of the four conformations resolved in this study, three are reaction intermediates. In addition to canonical catalytic dwell and binding dwell structures, we identify two unique conformations with nearly identical positions of the central rotor but different catalytic site conformations. These structures provide new insights into the catalytic mechanism of the ATP synthase and highlight elastic coupling between the catalytic and proton translocating domains.

PubMed: 38316880
DOI: 10.1038/s41594-024-01219-4

Experimental method

ELECTRON MICROSCOPY (4.2 Å)