Research Project
Grant-in-Aid for Scientific Research (C)
We found epoxycyclohexenedione (ECHD)-type compounds as unique inhibitors of the bovine heart mitochondrial ADP/ATP carrier (AAC). Proteomic analyses of ECHD-bound AAC as well as biochemical characterization using different SH reagents showed that ECHDs inhibit the function of AAC by covalently binding primarily to Cys57 and secondarily to Cys160. Interestingly, AAC remarkably aggregated in SMPs upon being incubated with high concentrations of ECHDs for a long period of time. ECHDs are the first chemicals, to the best of our knowledge, to induce prominent structural alteration in AAC without forming intermolecular S-S linkages. When all solvent accessible cysteines (Cys57, Cys160, and Cys257) were previously modified by N-ethylmaleimide, the aggregation of AAC was completely suppressed. In contrast, when Cys57 or Cys160 is selectively modified by a SH reagent, the covalent binding of ECHDs to a residual free residue of the two cysteines is sufficient to induce aggregation.
ミトコンドリアADP/ATP輸送体(AAC)は、ミトコンドリア内膜上でADPとATPの交換輸送を行う分子質量約30 kDaの膜輸送体である。AACは細胞のエネルギー代謝の要となる膜輸送体であるため、本輸送体の特異的阻害剤に関する研究は、エネルギー代謝を制御する新規な薬剤の開発研究に資するところが大きい。申請者は、既知のAAC阻害剤であるBKA類やCATR類と分子骨格の異なるエポキシシクロヘキセンジオン類(ECHD類)がAACの新規な阻害剤であることを見出した。本化合物は、細胞のエネルギー代謝を標的とする新たな医農薬シーズとしての可能性を秘めている。
All 2021 2020 2019 2018 Other
All Int'l Joint Research (3 results) Journal Article (11 results) (of which Int'l Joint Research: 3 results, Peer Reviewed: 11 results, Open Access: 4 results) Presentation (35 results) (of which Int'l Joint Research: 2 results, Invited: 2 results) Remarks (5 results)
Journal of Biological Chemistry
Volume: 295 Issue: 36 Pages: 12739-12754
10.1074/jbc.ra120.014229
Volume: 295 Issue: 21 Pages: 7481-7491
10.1074/jbc.ra120.013366
Bioscience, Biotechnology, and Biochemistry
Volume: 84 Issue: 7 Pages: 1322-1331
10.1080/09168451.2020.1747974
120006876586
The Journal of Biological Chemistry
Volume: 295 Issue: 8 Pages: 2449-2463
10.1074/jbc.ra119.012347
Volume: 294 Issue: 16 Pages: 6550-6561
10.1074/jbc.ra119.007687
Journal of Bacteriology
Volume: 201 Issue: 11
10.1128/jb.00718-18
Journal of Antibiotics
Volume: 72 Issue: 9 Pages: 645-652
10.1038/s41429-019-0197-5
Bio-Protocol
Volume: 9 Issue: 17
10.21769/bioprotoc.3349
Volume: 294 Issue: 2 Pages: 679-696
10.1074/jbc.ra118.006056
Biochemistry
Volume: 58 Issue: 8 Pages: 1141-1154
10.1021/acs.biochem.8b01209
Volume: 57 Issue: 6 Pages: 1031-1044
10.1021/acs.biochem.7b01119
http://www.biofunc-chem.kais.kyoto-u.ac.jp
https://scholar.google.co.jp/citations?user=I66ybkoAAAAJ&hl=ja
https://researchmap.jp/read0145924/