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Sequences of Tolypins, Insecticidal Efrapeptin‐Type Peptaibiotics from Species of the Fungal Genus Tolypocladium
Chemistry & Biodiversity ( IF 2.9 ) Pub Date : 2020-06-23 , DOI: 10.1002/cbdv.202000276
Hans Brückner 1 , Thomas Degenkolb 1, 2
Affiliation  

A peptide mixture named tolypin, originally isolated from species of the fungal genus Tolypocladium, was structurally characterised and sequences compared to those reported for efrapeptins isolated from strains of Tolypocladium inflatum. Chiral amino acid analysis, direct infusion, and online HPLC electrospray ionization tandem mass spectrometry provided composition, molecular weights of peptides, and series of diagnostic fragment ions. Sequences deduced from ESI‐MS revealed that tolypins C−G are identical to efrapeptins C−G. The results were corroborated by ESI‐MS and HPLC of an authentic efrapeptin sample from Eli Lilly Research Laboratories (USA). Comparison of the HPLC elution profiles of efrapeptin and tolypin indicated a pronounced microheterogeneity of the former. A high‐resolution HPLC of authentic efrapeptin has not been published before. Close relationship and partial identity of sequences of tolypins and efrapeptins, which had previously been postulated, were definitely proven. The geographical origin of the two most important T. inflatum strains used for sequencing of efrapeptins/tolypins could unambiguously be clarified. A new minor compound, designated tolypin H1, was sequenced. High proportions of helicogenic Aib (α‐aminoisobutyric acid) and l‐isovaline, N‐terminal acetyl‐l‐pipecolic acid and the unusual, amide‐bound C‐terminal residue, named (S)‐2‐amino‐1‐(1,5‐diazabicyclo[4.3.0]non‐5‐ene‐5‐ylium)‐4‐methylpentane corresponding to 1‐[(2S)‐2‐amino‐4‐methylpentyl]‐2,3,4,6,7,8‐hexahydropyrrolo[1,2‐a]pyrimidin‐1‐ium, define these peptides as linear, cationic peptaibiotics.

中文翻译:

来自真菌属 Tolypocladium 物种的 Tolypins、杀虫 Efrapeptin 型肽生物素的序列

一种名为 tolypin 的肽混合物,最初是从 Tolypocladium 真菌属的物种中分离出来的,其结构特征和序列与从 Tolypocladium inflatum 菌株中分离的 efrapeptins 的序列进行比较。手性氨基酸分析、直接注入和在线 HPLC 电喷雾电离串联质谱提供了肽的组成、分子量和一系列诊断碎片离子。从 ESI-MS 推导出的序列显示 tolypins C-G 与 efrapeptins C-G 相同。结果得到了来自礼来研究实验室(美国)的真实 efrapeptin 样品的 ESI-MS 和 HPLC 证实。efrapeptin 和 tolypin 的 HPLC 洗脱曲线的比较表明前者的显着微异质性。以前从未发表过真正的 efrapeptin 的高分辨率 HPLC。先前假设的 tolypins 和 efrapeptins 序列的密切关系和部分同一性已被明确证明。用于 efrapeptins/tolypins 测序的两个最重要的 T. inflatum 菌株的地理起源可以明确澄清。一种新的次要化合物,命名为 tolypin H1,被测序。高比例的螺旋源 Aib(α-氨基异丁酸)和 l-异缬氨酸、N 端乙酰基-l-哌啶酸和不寻常的、酰胺结合的 C 端残基,命名为 (S)-2-amino-1-(1 ,5-二氮杂双环[4.3.0]non-5-ene-5-ylium)-4-methylpentane 对应于 1-[(2S)-2-amino-4-methylpentyl]-2,3,4,6,7 ,8-六氢吡咯并[1,2-a]嘧啶-1-ium,将这些肽定义为线性、阳离子肽类生物素。之前假设的,确实得到了证明。用于 efrapeptins/tolypins 测序的两个最重要的 T. inflatum 菌株的地理起源可以明确澄清。一种新的次要化合物,命名为 tolypin H1,被测序。高比例的螺旋源 Aib(α-氨基异丁酸)和 l-异缬氨酸、N 端乙酰基-l-哌啶酸和不寻常的、酰胺结合的 C 端残基,命名为 (S)-2-amino-1-(1 ,5-二氮杂双环[4.3.0]non-5-ene-5-ylium)-4-methylpentane 对应于 1-[(2S)-2-amino-4-methylpentyl]-2,3,4,6,7 ,8-六氢吡咯并[1,2-a]嘧啶-1-ium,将这些肽定义为线性、阳离子肽类生物素。之前假设的,确实得到了证明。用于 efrapeptins/tolypins 测序的两个最重要的 T. inflatum 菌株的地理起源可以明确澄清。一种新的次要化合物,命名为 tolypin H1,被测序。高比例的螺旋源 Aib(α-氨基异丁酸)和 l-异缬氨酸、N 端乙酰基-l-哌啶酸和不寻常的、酰胺结合的 C 端残基,命名为 (S)-2-amino-1-(1 ,5-二氮杂双环[4.3.0]non-5-ene-5-ylium)-4-methylpentane 对应于 1-[(2S)-2-amino-4-methylpentyl]-2,3,4,6,7 ,8-六氢吡咯并[1,2-a]嘧啶-1-ium,将这些肽定义为线性、阳离子肽类生物素。一种新的次要化合物,命名为 tolypin H1,被测序。高比例的螺旋源 Aib(α-氨基异丁酸)和 l-异缬氨酸、N 端乙酰基-l-哌啶酸和不寻常的、酰胺结合的 C 端残基,命名为 (S)-2-amino-1-(1 ,5-二氮杂双环[4.3.0]non-5-ene-5-ylium)-4-methylpentane 对应于 1-[(2S)-2-amino-4-methylpentyl]-2,3,4,6,7 ,8-六氢吡咯并[1,2-a]嘧啶-1-ium,将这些肽定义为线性、阳离子肽类生物素。一种新的次要化合物,命名为 tolypin H1,被测序。高比例的螺旋源 Aib(α-氨基异丁酸)和 l-异缬氨酸、N 端乙酰基-l-哌啶酸和不寻常的、酰胺结合的 C 端残基,命名为 (S)-2-amino-1-(1 ,5-二氮杂双环[4.3.0]non-5-ene-5-ylium)-4-methylpentane 对应于 1-[(2S)-2-amino-4-methylpentyl]-2,3,4,6,7 ,8-六氢吡咯并[1,2-a]嘧啶-1-ium,将这些肽定义为线性、阳离子肽生物素。
更新日期:2020-06-23
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