In vitro mutasynthesis of lantibiotic analogues containing nonproteinogenic amino acids.

In vitro mutasynthesis of lantibiotic analogues containing nonproteinogenic amino acids.
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DOI:
10.1021/ja903239s
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发表时间:
2009-09-02
影响因子:
15
通讯作者:
van der Donk, Wilfred A.
van der Donk, Wilfred A.
中科院分区:
化学1区
文献类型:
--
作者:
Levengood, Matthew R.;Knerr, Patrick J.;Oman, Trent J.;van der Donk, Wilfred A.

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抗菌素是一种核糖体合成和翻译后修饰的多肽抗生素,含有特有的硫醚交联物、羊硫氨酸和甲硫氨酸。到目前为止,还没有含有非蛋白原性氨基酸的抗生素类似物的报道。在这项研究中,体外重组的乳酸481合成酶与含有非蛋白生成氨基酸的合成肽底物相结合,产生了11个乳酸481类似物。这些类似物包括取代Gly5的肌氨酸和氨基环丙酸,取代Glu13的D-valine,位于Asn15的β3-高精氨酸,位于Met16的N-丁基甘氨酸和β-Ala,位于Trp19的萘丙氨酸(NAL),位于Phe21的4-吡啶丙氨酸(PAL),位于Phe23的高苯丙氨酸(HPhe)。在这些类似物中,Trp19Nal和Phe23hPhe突变体在琼脂扩散试验中对指示菌株乳酸乳球菌HP和枯草芽孢杆菌6633提供了比亲本化合物更大的抑制区域。这两种化合物对乳酸乳杆菌液体培养的MIC值也有所提高。
Lantibiotics are ribosomally synthesized and post-translationally modified peptide antibiotics containing the characteristic thioether cross-links lanthionine and methyllanthionine. To date, no analogues of lantibiotics that contain nonproteinogenic amino acids have been reported. In this study, in vitro-reconstituted lacticin 481 synthetase was used in conjunction with synthetic peptide substrates containing nonproteinogenic amino acids to generate 11 analogues of lacticin 481. These analogues contained sarcosine and aminocyclopropanoic acid in place of Gly5, d-valine at position 6, 4-cyanoaminobutyric acid in place of Glu13, β3-homoarginine at the position of Asn15, N-butylglycine and β-Ala at Met16, naphthylalanine (Nal) at Trp19, 4-pyridynylalanine (Pal) at Phe21, and homophenylalanine (hPhe) at Phe23. Of these analogues, the Trp19Nal and Phe23hPhe mutants provided zones of inhibition larger than the parent compound in agar diffusion assays against the indicator strains Lactococcus lactis HP and Bacillus subtilis 6633. These two compounds also demonstrated improved MIC values against liquid cultures of L. lactis HP.
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