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-Structure paper
| タイトル | Cryo-EM structure of the yeast Saccharomyces cerevisiae SDH provides a template for eco-friendly fungicide discovery. |
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| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 8936, Year 2025 |
| 掲載日 | 2025年10月8日 |
著者 | Zhi-Wen Li / Yuan-Hui Huang / Ge Wei / Zong-Wei Lu / Yu-Xia Wang / Guang-Rui Cui / Jun-Ya Wang / Xin-He Yu / Yi-Xuan Fu / Er-Di Fan / Qiong-You Wu / Xiao-Lei Zhu / Ying Ye / Guang-Fu Yang / ![]() |
| PubMed 要旨 | Succinate dehydrogenase (SDH) is a key fungicidal target, but rational inhibitors design has been impeded by the lack of fungal SDH structure. Here, we show the cryo-EM structure of SDH from ...Succinate dehydrogenase (SDH) is a key fungicidal target, but rational inhibitors design has been impeded by the lack of fungal SDH structure. Here, we show the cryo-EM structure of SDH from Saccharomyces cerevisiae (ScSDH) in apo (3.36 Å) and ubiquinone-1-bound (3.25 Å) states, revealing subunits architecture and quinone-binding sites (Q). ScSDH is classified as a heme-deficient type-D SDH, utilizing conserved redox centers (FAD, [2Fe-2S], [4Fe-4S] and [3Fe-4S] clusters) for electron transfer. A 3.23 Å structure with pydiflumetofen (PYD) identified critical interactions, including hydrogen bonds with Trp_SDHB194 and Tyr_SDHD120, and a cation-π interaction with Arg_SDHC97. Leveraging this, we designed a SDH inhibitor E8 (enprocymid), exhibiting significant fungicidal activity (K = 0.019 μM) and reduced zebrafish toxicity (LC (96 h) = 1.01 mg a.i./L). This study elucidates the structure of fungal SDH and demonstrates the potential of ScSDH for rational design of next-generation fungicides, addressing fungal resistance and environmental toxicity in agriculture. |
リンク | Nat Commun / PubMed:41062466 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.06 - 3.36 Å |
| 構造データ | EMDB-62490, PDB-9kps: EMDB-62491, PDB-9kpt: EMDB-62495, PDB-9kq3: EMDB-63115, PDB-9lig: |
| 化合物 | ![]() ChemComp-FAD: ![]() ChemComp-FES: ![]() ChemComp-SF4: ![]() ChemComp-F3S: ![]() ChemComp-PEE: ![]() ChemComp-UQ1: ![]() PDB-1ee4: ![]() PDB-1ekv: |
| 由来 |
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キーワード | MEMBRANE PROTEIN / Complex / mitochondria / ELECTRON TRANSPORT |
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