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-Structure paper
タイトル | Structural and functional investigations of syn-copalyl diphosphate synthase from Oryza sativa. |
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ジャーナル・号・ページ | Commun Chem, Vol. 6, Issue 1, Page 240, Year 2023 |
掲載日 | 2023年11月6日 |
著者 | Xiaoli Ma / Haifeng Xu / Yuru Tong / Yunfeng Luo / Qinghua Dong / Tao Jiang / |
PubMed 要旨 | The large superfamily of labdane-related diterpenoids is defined by the cyclization of linear geranylgeranyl pyrophosphate (GGPP), catalyzed by copalyl diphosphate synthases (CPSs) to form the basic ...The large superfamily of labdane-related diterpenoids is defined by the cyclization of linear geranylgeranyl pyrophosphate (GGPP), catalyzed by copalyl diphosphate synthases (CPSs) to form the basic decalin core, the copalyl diphosphates (CPPs). Three stereochemically distinct CPPs have been found in plants, namely (+)-CPP, ent-CPP and syn-CPP. Here, we used X-ray crystallography and cryo-EM methods to describe different oligomeric structures of a syn-copalyl diphosphate synthase from Oryza sativa (OsCyc1), and provided a cryo-EM structure of OsCyc1 mutant in complex with the substrate GGPP. Further analysis showed that tetramers are the dominant form of OsCyc1 in solution and are not necessary for enzyme activity in vitro. Through rational design, we identified an OsCyc1 mutant that can generate ent-CPP in addition to syn-CPP. Our work provides a structural and mechanistic basis for comparing different CPSs and paves the way for further enzyme design to obtain diterpene derivatives with specific chirality. |
リンク | Commun Chem / PubMed:37932442 / PubMed Central |
手法 | EM (単粒子) / X線回折 |
解像度 | 3.49 - 7.9 Å |
構造データ | EMDB-35202, PDB-8i6p: EMDB-35206, PDB-8i6t: EMDB-35207, PDB-8i6u: EMDB-35440, PDB-8ih5: PDB-8kbw: |
化合物 | ChemComp-GRG: |
由来 |
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キーワード | ISOMERASE / syn-copalyl diphosphate synthase / labdane-related diterpenoids / oligomer cryo-EM structure / plant defense / PLANT PROTEIN / hexamer cryo-EM structure / dimer cryo-EM structure / labdane-related diterpenoid / GGPP complexed cryo-EM structure / apo-state crystal structure |