Abstract
The structure of the complex between bovine mitochondrial F 1 -ATPase and a stator subcomplex has been determined at a resolution of 3.2 Å. The resolved region of the stator contains residues 122–207 of subunit b; residues 5–25 and 35–57 of F 6 ; 3 segments of subunit d from residues 30–40, 65–74, and 85–91; and residues 1–146 and 169–189 of the oligomycin sensitivity conferral protein (OSCP). The stator subcomplex represents its membrane distal part, and its structure has been augmented with an earlier structure of a subcomplex containing residues 79–183, 3–123, and 5–70 of subunits b, d, and F 6 , respectively, which extends to the surface of the inner membrane of the mitochondrion. The N-terminal domain of the OSCP links the stator with F 1 -ATPase via α-helical interactions with the N-terminal region of subunit α E . Its C-terminal domain makes extensive helix–helix interactions with the C-terminal α-helix of subunit b from residues 190–207. Subunit b extends as a continuous 160-Å long α-helix from residue 188 back to residue 79 near to the surface of the inner mitochondrial membrane. This helix appears to be stiffened by other α-helices in subunits d and F 6 , but the structure can bend inward toward the F 1 domain around residue 146 of subunit b. The linker region between the 2 domains of the OSCP also appears to be flexible, enabling the stator to adjust its shape as it passes over the changing profile of the F 1 domain during a catalytic cycle. The structure of the membrane extrinsic part of bovine ATP synthase is now complete.
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Dates
Type | When |
---|---|
Created | 15 years, 8 months ago (Dec. 8, 2009, 12:32 a.m.) |
Deposited | 3 years, 4 months ago (April 12, 2022, 6:58 p.m.) |
Indexed | 2 weeks, 1 day ago (Aug. 7, 2025, 4:48 p.m.) |
Issued | 15 years, 8 months ago (Dec. 22, 2009) |
Published | 15 years, 8 months ago (Dec. 22, 2009) |
Published Online | 15 years, 8 months ago (Dec. 22, 2009) |
Published Print | 15 years, 8 months ago (Dec. 22, 2009) |
@article{Rees_2009, title={The structure of the membrane extrinsic region of bovine ATP synthase}, volume={106}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.0910365106}, DOI={10.1073/pnas.0910365106}, number={51}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Rees, David M. and Leslie, Andrew G. W. and Walker, John E.}, year={2009}, month=dec, pages={21597–21601} }