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-Structure paper
タイトル | Structural basis of respiratory complex adaptation to cold temperatures. |
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ジャーナル・号・ページ | Cell, Year 2024 |
掲載日 | 2024年10月3日 |
著者 | Young-Cheul Shin / Pedro Latorre-Muro / Amina Djurabekova / Oleksii Zdorevskyi / Christopher F Bennett / Nils Burger / Kangkang Song / Chen Xu / Joao A Paulo / Steven P Gygi / Vivek Sharma / Maofu Liao / Pere Puigserver / |
PubMed 要旨 | In response to cold, mammals activate brown fat for respiratory-dependent thermogenesis reliant on the electron transport chain. Yet, the structural basis of respiratory complex adaptation upon cold ...In response to cold, mammals activate brown fat for respiratory-dependent thermogenesis reliant on the electron transport chain. Yet, the structural basis of respiratory complex adaptation upon cold exposure remains elusive. Herein, we combined thermoregulatory physiology and cryoelectron microscopy (cryo-EM) to study endogenous respiratory supercomplexes from mice exposed to different temperatures. A cold-induced conformation of CI:III (termed type 2) supercomplex was identified with a ∼25° rotation of CIII around its inter-dimer axis, shortening inter-complex Q exchange space, and exhibiting catalytic states that favor electron transfer. Large-scale supercomplex simulations in mitochondrial membranes reveal how lipid-protein arrangements stabilize type 2 complexes to enhance catalytic activity. Together, our cryo-EM studies, multiscale simulations, and biochemical analyses unveil the thermoregulatory mechanisms and dynamics of increased respiratory capacity in brown fat at the structural and energetic level. |
リンク | Cell / PubMed:39395414 |
手法 | EM (単粒子) |
解像度 | 3.1 - 6.3 Å |
構造データ | EMDB-35313, PDB-8iao: EMDB-35314, PDB-8iap: EMDB-35315, PDB-8iaq: EMDB-35316, PDB-8iar: EMDB-35331, PDB-8ib4: EMDB-35332, PDB-8ib5: EMDB-35333, PDB-8ib6: EMDB-35334, PDB-8ib7: EMDB-35336, PDB-8ib9: EMDB-35337, PDB-8iba: EMDB-35338, PDB-8ibb: EMDB-35339, PDB-8ibc: EMDB-35340, PDB-8ibd: EMDB-35341, PDB-8ibe: EMDB-35342, PDB-8ibf: EMDB-35343, PDB-8ibg: EMDB-35352: Respiratory complex CI:CIII2, type I, PERK -/- mouse under cold temperature EMDB-35353: Respiratory complex Peripheral Arm of CI, focus-refined map of type I, PERK -/- mouse under cold temperature EMDB-35354, PDB-8ic4: EMDB-35355, PDB-8ic5: EMDB-38506, PDB-8xnl: EMDB-38507, PDB-8xnm: EMDB-38508, PDB-8xnn: EMDB-38509, PDB-8xno: EMDB-38510, PDB-8xnp: EMDB-38511, PDB-8xnq: EMDB-38512, PDB-8xnr: EMDB-38513, PDB-8xns: EMDB-38514, PDB-8xnt: EMDB-38515, PDB-8xnu: EMDB-38516, PDB-8xnv: EMDB-38517, PDB-8xnw: EMDB-38518, PDB-8xnx: EMDB-38519, PDB-8xny: EMDB-38520, PDB-8xnz: EMDB-38521, PDB-8xo0: |
化合物 | ChemComp-3PE: ChemComp-CDL: ChemComp-SF4: ChemComp-UQ1: ChemComp-FES: ChemComp-FMN: ChemComp-UQ9: ChemComp-PC1: ChemComp-ADP: ChemComp-NDP: ChemComp-ZN: ChemComp-EHZ: ChemComp-HEM: ChemComp-UQ6: ChemComp-HEC: ChemComp-3PH: |
由来 |
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キーワード | ELECTRON TRANSPORT / Respiratory complex / Respiratory supercomplex |