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-Structure paper
Title | In-cell architecture of the mitochondrial respiratory chain. |
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Journal, issue, pages | Science, Vol. 387, Issue 6740, Page 1296-1301, Year 2025 |
Publish date | Mar 21, 2025 |
![]() | Florent Waltz / Ricardo D Righetto / Lorenz Lamm / Thalia Salinas-Giegé / Ron Kelley / Xianjun Zhang / Martin Obr / Sagar Khavnekar / Abhay Kotecha / Benjamin D Engel / ![]() ![]() ![]() ![]() ![]() |
PubMed Abstract | Mitochondria regenerate adenosine triphosphate (ATP) through oxidative phosphorylation. This process is carried out by five membrane-bound complexes collectively known as the respiratory chain, ...Mitochondria regenerate adenosine triphosphate (ATP) through oxidative phosphorylation. This process is carried out by five membrane-bound complexes collectively known as the respiratory chain, working in concert to transfer electrons and pump protons. The precise organization of these complexes in native cells is debated. We used in situ cryo-electron tomography to visualize the native structures and organization of several major mitochondrial complexes in cells. ATP synthases and respiratory complexes segregate into curved and flat crista membrane domains, respectively. Respiratory complexes I, III, and IV assemble into a respirasome supercomplex, from which we determined a native 5-angstrom (Å) resolution structure showing binding of electron carrier cytochrome . Combined with single-particle cryo-electron microscopy at 2.4-Å resolution, we model how the respiratory complexes organize inside native mitochondria. |
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Methods | EM (single particle) / EM (subtomogram averaging) |
Resolution | 2.21 - 28.5 Å |
Structure data | EMDB-50202, PDB-9f5x: EMDB-50203, PDB-9f5y: EMDB-50204, PDB-9f5z: EMDB-50205, PDB-9f60: EMDB-50206, PDB-9f61: ![]() EMDB-50207: Structure of the Chlamydomonas reinhardtii respiratory supercomplex, focused on complex I matrix part ![]() EMDB-50208: Structure of the Chlamydomonas reinhardtii respiratory supercomplex, focused on complex I proximal membrane part ![]() EMDB-50209: Structure of the Chlamydomonas reinhardtii respiratory supercomplex, focused on complex I distal membrane part EMDB-50210: Subtomogram average of the Chlamydomonas reinhardtii mitochondrial respirasome - C2 symmetry ![]() EMDB-50211: Subtomogram average of the Chlamydomonas reinhardtii mitochondrial respirasome - C2 expanded ![]() EMDB-50212: Structure of the putative Chlamydomonas mitochondrial prohibitin ![]() EMDB-50213: Subtotomogram average of Chlamydomonas mitochondrial ribosome ![]() EMDB-50214: Subtomogram average of the Chlamydomonas reinhardtii mitochondrial respirasome - C2 expanded, complex I focus ![]() EMDB-50215: Subtomogram average of the Chlamydomonas reinhardtii mitochondrial respirasome - C2 expanded, complex III focus ![]() EMDB-50216: Subtomogram average of the Chlamydomonas reinhardtii mitochondrial respirasome - C1 symmetry ![]() EMDB-50248: Structure of the Chlamydomonas reinhardtii respiratory supercomplex, focused on complex I ![]() EMDB-50249: Structure of the Chlamydomonas reinhardtii respiratory supercomplex I1 III2 IV2 |
Chemicals | ![]() ChemComp-UQ5: ![]() ChemComp-HEM: ![]() ChemComp-CDL: ![]() ChemComp-3PH: ![]() ChemComp-PTY: ![]() ChemComp-HEC: ![]() ChemComp-PC7: ![]() ChemComp-ZN: ![]() ChemComp-PGT: ![]() ChemComp-HEA: ![]() ChemComp-CU: ![]() ChemComp-MG: ![]() ChemComp-CUA: ![]() ChemComp-FES: ![]() ChemComp-FMN: ![]() ChemComp-SF4: ![]() ChemComp-8Q1: ![]() ChemComp-NDP: ![]() ChemComp-COO: ![]() ChemComp-HOH: |
Source |
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![]() | MEMBRANE PROTEIN / Mitochondria / respiratory complex / respiration / alga / mitoribosome / assembly factor / plant / RIBOSOME / respirasome |