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首页> 外文期刊>The Journal of Antibiotics: An International Journal >Biosynthesis of cladospirone bisepoxide, a member of the spirobisnaphthalene family
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Biosynthesis of cladospirone bisepoxide, a member of the spirobisnaphthalene family

机译:螺双萘家族的成员cladospirone bisepoxide的生物合成

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The biosynthesis of cladospirone bisepoxide (1) was investigated by feeding C-13-labeled acetate to growing cultures of the fungus Sphaeropsidales sp. (strain F-24'707). C-13 NMR spectral analysis demonstrated the polyketide origin of both naphthalene units. The origin of two epoxide oxygens was confirmed as from air by cultivation of the strain in an O-18(2)-enriched atmosphere. The [O-18]incorporation pattern into palmarumycin C-12 (11), the putative precursor of 1 led to the hypothesis that the carbonyl oxygen of 1 is derived from water by exchange of an oxygen atom. inhibition of the biosynthesis of 1 with tricyclazole, an inhibitor of the 1,8-dihydroxynaphthalene (DHN) melanin biosynthesis, confirmed the connection of both biosynthetic pathways. [References: 29]
机译:通过将C-13标记的乙酸酯加入真菌Sphaeropsidales sp。的生长培养物中,研究了cladospirone bisepoxide(1)的生物合成。 (应变F-24'707)。 C 13 NMR光谱分析表明两个萘单元的聚酮化合物来源。通过在富含O-18(2)的气氛中培养菌株,从空气中确认了两个环氧化物氧的起源。推定的前驱体1的[O-18]掺入棕榈金霉素C-12(11)导致以下假设:1的羰基氧是通过交换氧原子从水中衍生而来的。抑制1,1,8-二羟基萘(DHN)黑色素生物合成的抑制剂三环唑对1的生物合成的抑制作用,证实了这两种生物合成途径的联系。 [参考:29]

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