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-Structure paper
| タイトル | Interaction with AK2A links AIFM1 to cellular energy metabolism. |
|---|---|
| ジャーナル・号・ページ | Mol Cell, Vol. 85, Issue 13, Page 2550-22566.e6, Year 2025 |
| 掲載日 | 2025年7月3日 |
著者 | Robin Alexander Rothemann / Egor Pavlenko / Mrityunjoy Mondal / Sarah Gerlich / Pavel Grobushkin / Sebastian Mostert / Julia Racho / Konstantin Weiss / Dylan Stobbe / Katharina Stillger / Kim Lapacz / Silja Lucia Salscheider / Carmelina Petrungaro / Dan Ehninger / Thi Hoang Duong Nguyen / Jörn Dengjel / Ines Neundorf / Daniele Bano / Simon Poepsel / Jan Riemer / ![]() |
| PubMed 要旨 | Apoptosis-inducing factor 1 (AIFM1) is a flavoprotein essential for mitochondrial function and biogenesis. Its interaction with MIA40/CHCHD4, the central component of the mitochondrial disulfide ...Apoptosis-inducing factor 1 (AIFM1) is a flavoprotein essential for mitochondrial function and biogenesis. Its interaction with MIA40/CHCHD4, the central component of the mitochondrial disulfide relay, accounts for some, but not all, aspects of AIFM1 function. We provide a high-confidence AIFM1 interactome that elucidates functional partners within the mitochondrial intermembrane space. We found that AIFM1 binding to adenylate kinase 2 (AK2), an essential enzyme that maintains cellular adenine nucleotide pools, depends on the AK2 C-terminal domain. High-resolution cryoelectron microscopy (cryo-EM) and biochemical analyses showed that both MIA40 and AK2A bind the AIFM1 C-terminal β-sheet domain. Their binding enhances NADH oxidoreductase activity by locking an active dimer conformation and, in the case of MIA40, affecting the cofactor-binding site. The AIFM1-AK2A interaction is important during mitochondrial respiration because AIFM1 serves as a recruiting hub within the IMS, regulating mitochondrial bioenergetic output by creating hotspots of metabolic enzymes. |
リンク | Mol Cell / PubMed:40578348 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.36 - 2.8 Å |
| 構造データ | EMDB-51514, PDB-9gqy: EMDB-51515, PDB-9gqz: EMDB-51516, PDB-9gr0: |
| 化合物 | ![]() ChemComp-FAD: ![]() ChemComp-NAD: ![]() ChemComp-HOH: |
| 由来 |
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キーワード | FLAVOPROTEIN / Complex / Homodimer / NADH / FAD / Reduced / Tetramer |
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