天然产物研究与开发 ›› 2022, Vol. 34 ›› Issue (9): 1523-1529.doi: 10.16333/j.1001-6880.2022.9.009

• 研究简报 • 上一篇    下一篇

Streptomyces sp. KC17012次生代谢产物及抗菌活性研究

何江波1,康大伟1,陈   秀1,王纪爱1,王   涛1,毕晓旭1,栾   杰2*,曹艳茹1*   

  1. 1昆明学院医学院,昆明 650214;2云南省疾病预防控制中心理化检测中心,昆明 650022
  • 出版日期:2022-09-28 发布日期:2022-10-09
  • 基金资助:
    云南省应用基础研究计划高校联合面上基金(2018FH001-052,202001BA070001-043);昆明市春城计划青年拔尖人才项目(C201914001);国家自然科学基金(31660002)

Secondary metabolites of Streptomyces sp.KC17012 and their antibacterial activity

HE Jiang-bo1,KANG Da-wei1,CHEN Xiu1,WANG Ji-ai1,WANG Tao1,BI Xiao-xu1,LUAN Jie2*,CAO Yan-ru1*   

  1. 1School of Medicine,Kunming University,Kunming 650214,China;2Center for Physical and Chemical Testing,Kunming,Yunnan Center for Disease Control and Prevention,Kunming 650022,China
  • Online:2022-09-28 Published:2022-10-09

摘要:

研究Streptomyces sp. KC17012的次生代谢产物。采用硅胶柱色谱、凝胶柱色谱、反相RP-18柱色谱等方法,对Streptomyces sp. KC17012的发酵产物乙酸乙酯萃取部分进行分离纯化,然后采用核磁共振波谱(1H NMR,13C NMR)与质谱方法(MS),结合与文献数据对比,共鉴定18个化合物,分别为seco-((S)-Pro-(R)-Val)(1)、环-(L-脯-L-酪)二肽(2)、环-(D-脯-L-酪)二肽(3)、环-(L-脯-L-苯丙)二肽(4)、色氨酸(5)、amethyldioxindole-3-acetate(6)、3-羧基吲哚(7)、邻氨基苯甲酸(8)、胸腺嘧啶核苷(9)、macrolactin A(10)、红花脂A(11)、(-)-methyl dihydrophaseate(12)、菜豆酸(13)、(-)-ethyl dihydrophaseate(14)、布卢门醇A(15)、3α-hydroxy-5α,6α-epoxy-7-megastigmen-9-one(16)、trogopterin A(17)、和β-谷甾醇(18),其中化合物1~4属于二肽类,11~14为倍半萜类脱落酸类似物。采用微量稀释法检测以上单体化合物的体外抗菌活性,结果表明化合物110分别在11和33 μmol/L浓度下对枯草杆菌、大肠杆菌、金黄色葡萄球菌具有较好的抑制作用。本研究为进一步挖掘链霉菌KC17012的代谢产物奠定了基础。

关键词: 链霉菌, 抑菌活性, 二肽, 脱落酸类似物, 结构鉴定

Abstract:

To study the secondary metabolties of Streptomyces sp. KC17012.The compounds were isolated by silica column chromatography,Sephadex LH-20 column chromatography,and RP-18 reverse-phase column chromatography from the EtOAc extract of the culture of Streptomyces sp. KC17012.The structures were characterized by various spectroscopic method (1H NMR,13C NMR and MS) and comparison with the data of literatures.Eighteen compounds were isolated from the EtOAc extract,and identified as seco-((S)-Pro-(R)-Val) (1),cyclo(L-Pro-L-Tyr) (2),cyclo(D-Pro-L-Tyr) (3),cyclo(L-Pro-L-Phe) (4),tryptophan (5),methyldioxindole 3-acetate (6),1H-indole-3-carboxylic (7),anthranllic acid (8),thymidine (9),macrolactin A (10),carthamate A (11),(-)-methyl dihydrophaseate (12),phaseic acid (13),(-) -ethyl dihydrophaseate (14),blumenol A (15),3α-hydroxy-5α,6α-epoxy-7-megastigmen-9-one (16),trogopterin A (17),and β-sitosterol (18).All compounds were isolated from Streptomyces sp.KC17012 for the first time,compounds 1-4 were dipeptide type compound,and abscisic derivatives (11-14) belong to sesquiterpenes.Microdilution method was used to test the antibacterial activity of the above compounds.Compounds 1 and 10 were effective against Bacillus subtilis,Escherichia coli,and Staphylococcus aureus at the concentrations of 11 and 33 μmol/L respectively.This study lay a foundation for the further exploitation of the metabolites of Streptomyces sp. KC17012.

Key words: Streptomyces sp., antibacterial activity, dipeptide, abscisic derivatives, structural identification

中图分类号:  R284.2