National Natural Science Foundation of China (NSFC)
中国
引用
ジャーナル: Nat Commun / 年: 2025 タイトル: Cryo-EM structure of the yeast Saccharomyces cerevisiae SDH provides a template for eco-friendly fungicide discovery. 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 / 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.
名称: Succinate dehydrogenase [ubiquinone] flavoprotein subunit, mitochondrial タイプ: protein_or_peptide / ID: 1 詳細: Sequence reference for Saccharomyces cerevisiae (strain RedStar) is not available at the time of biocuration. Current sequence reference is from UniProt id Q00711. コピー数: 1 / 光学異性体: LEVO / EC番号: succinate dehydrogenase
名称: Succinate dehydrogenase [ubiquinone] iron-sulfur subunit, mitochondrial タイプ: protein_or_peptide / ID: 2 詳細: Sequence reference for Saccharomyces cerevisiae (strain RedStar) is not available at the time of biocuration. Current sequence reference is from UniProt id P21801. コピー数: 1 / 光学異性体: LEVO / EC番号: succinate dehydrogenase
名称: Sdh3p / タイプ: protein_or_peptide / ID: 3 詳細: Sequence reference for Saccharomyces cerevisiae (strain RedStar) is not available at the time of biocuration. Current sequence reference is from UniProt id C7GVH5. コピー数: 1 / 光学異性体: LEVO
分子 #4: Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, ...
分子
名称: Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial タイプ: protein_or_peptide / ID: 4 詳細: Sequence reference for Saccharomyces cerevisiae (strain RedStar) is not available at the time of biocuration. Current sequence reference is from UniProt id P37298. コピー数: 1 / 光学異性体: LEVO