Bioactive secondary metabolites from a new terrestrial Streptomyces sp. TN262.

Bioactive secondary metabolites from a new terrestrial Streptomyces sp. TN262.
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DOI:
10.1007/s12010-009-8808-4
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发表时间:
2010-09
影响因子:
3
通讯作者:
Laatsch, Hartmut
Laatsch, Hartmut
中科院分区:
工程技术3区
文献类型:
--
作者:
Elleuch, Lobna;Shaaban, Mohamed;Smaoui, Slim;Mellouli, Lotfi;Karray-Rebai, Ines;Fguira, Lilia Fourati-Ben;Shaaban, Khaled A.;Laatsch, Hartmut

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在我们寻找链霉菌作为生物活性次级代谢物的新生产者的过程中,新的陆生链霉菌分离物TN262的乙酸乙酯提取物提供了8种抗菌活性化合物。分别鉴定为1-乙酰基-β-卡波林(1)、色氨酸(2)、cineromycin B(3)、2,3-二氢cineromycin B(4)、cycloo -(tyrosylprolyl)(5)、3-(hydroxyacetyl)-吲哚(6)、brevianamide F(7)、顺式cycloo -(l-prolyl-l-leucyl)(8)。用GC-MS在非极性组分中检测到另外三种代谢物,并初步确定为二苯甲酮(9)、n -丁基苯磺酰胺(10)和己二酸-双-(2-乙基己基)酯(11)。最后一种化合物被称为增塑剂衍生物,但从未从天然来源描述过。本文从培养特性、16S rRNA基因序列和系统发育分析等方面对链霉菌新分离物TN262进行了鉴定,并对其进行了优化、大规模发酵、生物活性成分的分离和结构测定。并对化合物(2)、(3)、(4)及其非极性组分的生物活性进行了分析。
During our search for Streptomyces spp. as new producers of bioactive secondary metabolites, the ethyl acetate extract of the new terrestrial Streptomyces isolate TN262 delivered eight antimicrobially active compounds. They were identified as 1-acetyl-β-carboline (1), tryptophol (2), cineromycin B (3), 2,3-dihydrocineromycin B (4), cyclo-(tyrosylprolyl) (5), 3-(hydroxyacetyl)-indole (6), brevianamide F (7), and cis-cyclo-(l-prolyl-l-leucyl) (8). Three further metabolites were detected in the unpolar fractions using GC–MS and tentatively assigned as benzophenone (9), N-butyl-benzenesulfonamide (10), and hexanedioic acid-bis-(2-ethylhexyl) ester (11). This last compound is known as plasticizer derivatives, but it has never been described from natural sources. In this article, we describe the identification of the new Streptomyces sp. isolate TN262 using its cultural characteristics, the nucleotide sequence of the corresponding 16S rRNA gene and the phylogenetic analysis, followed by optimization, large-scale fermentation, isolation of the bioactive constituents, and determination of their structures. The biological activity of compounds (2), (3), (4), and those of the unpolar fractions was addressed as well.
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