Targeted isolation of antitubercular cycloheptapeptides and an unusual pyrroloindoline-containing new analog, asperpyrroindotide A, using LC-MS/MS-based molecular networking.

Targeted isolation of antitubercular cycloheptapeptides and an unusual pyrroloindoline-containing new analog, asperpyrroindotide A, using LC-MS/MS-based molecular networking.
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使用基于 LC–MS/MS– 的分子网络,有针对性地分离抗结核环七肽和一种不寻常的吡咯并吲哚啉 — 含有新类似物 asperpyrroindotide A

DOI:
10.1007/s42995-022-00157-8
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发表时间:
2023
影响因子:
5.7
通讯作者:
--
中科院分区:
生物学2区
文献类型:
--
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在基于MS/MS的分子网络的指导下,对软珊瑚衍生真菌Aspergillus versicolor的次级代谢产物的进一步了解导致分离出七种已知的环七肽,即asperversiamides A-C(1-3)和asperheptatides A-D(4-7)以及一种不寻常的含有吡咯并吲哚啉的新环七肽asperpyrroindotide A(8)。通过综合的波谱数据分析确定了化合物8的结构,并采用改进的马氏法确定了化合物8的绝对构型。成功地实现了1到8的半合成转化,并优化了反应条件。此外,半合成了一系列新的asperversiamide A(1)衍生物(10−19),并评价了它们对结核分枝杆菌H37 Ra的抗结核活性。初步的结构-活性关系表明,丝氨酸羟基和色氨酸残基是重要的活性。在线版本包含补充材料,可通过10.1007/s42995-022-00157-8获得。
Further insights on the secondary metabolites of a soft coral-derived fungus Aspergillus versicolor under the guidance of MS/MS-based molecular networking led to the isolation of seven known cycloheptapeptides, namely, asperversiamides A–C (1–3) and asperheptatides A–D (4–7) and an unusual pyrroloindoline-containing new cycloheptapeptide, asperpyrroindotide A (8). The structure of 8 was elucidated by comprehensive spectroscopic data analysis, and its absolute configuration was determined by advanced Marfey’s method. The semisynthetic transformation of 1 into 8 was successfully achieved and the reaction conditions were optimized. Additionally, a series of new derivatives (10−19) of asperversiamide A (1) was semi-synthesized and their anti-tubercular activities were evaluated against Mycobacterium tuberculosis H37Ra. The preliminary structure−activity relationships revealed that the serine hydroxy groups and the tryptophan residue are important to the activity. The online version contains supplementary material available at 10.1007/s42995-022-00157-8.
使用基于 LC-MS/MS 的分子网络和修饰肉桂酸酯衍生物的抗结核活性,从珊瑚源真菌中靶向分离曲庚肽。
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