The O-Carbamoyl-Transferase Alb15 Is Responsible for the Modification of Albicidin.

The O-Carbamoyl-Transferase Alb15 Is Responsible for the Modification of Albicidin.
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O-氨基甲酰基转移酶 Alb15 负责 albicidin 的修饰

DOI:
10.1021/acschembio.5b01001
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发表时间:
2016
影响因子:
4
通讯作者:
R.D. Süssmuth
R.D. Süssmuth
中科院分区:
生物学2区
文献类型:
--
作者:
D. Petras;D. Kerwat;A. Pesic;B.F. Hempel;L. von Eckardstein;S. Semsary;J. Arasté;M. Marguerettaz;M. Royer;S. Cociancich;R.D. Süssmuth

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Albicidin是一种由白化黄单胞菌产生的强效抗生素和植物毒素,靶向植物和细菌DNA回旋酶。我们现在报道一种新的albicidin衍生物,它通过存在于albicidin(alb)基因簇中的ATP依赖性O-氨基甲酰基转移酶Alb 15的作用在N-末端香豆酸处被氨基甲酰基化。利用串联质谱法对黄单胞菌高产菌株的氨基甲酰基-albicidin进行了表征,并通过X中alb 15的基因失活证实了基因功能。阿尔比利尼人alb 15在大肠杆菌中的表达和体外重组的氨甲酰转移酶活性证实albicidin为底物。化学合成的氨基甲酰-albicidin最终使我们能够通过体外旋转酶抑制和抗菌试验来评估其生物活性。与albicidin相比,氨基甲酰基-albicidin对细菌促旋酶显示出显著更高的抑制效率(108 nM对49 nM),这确定了氨基甲酰基是albicidin成熟的重要结构特征。
Albicidin is a potent antibiotic and phytotoxin produced byXanthomonas albilineanswhich targets the plant and bacterial DNA gyrase. We now report on a new albicidin derivative which is carbamoylated at theN-terminal coumaric acid by the action of the ATP-dependentO-carbamoyltransferase Alb15, present in the albicidin (alb) gene cluster. Carbamoyl-albicidin was characterized by tandem mass spectrometry from cultures of aXanthomonasoverproducer strain and the gene function confirmed by gene inactivation ofalb15inX. albilineans. Expression ofalb15inEscherichia coliandin vitroreconstitution of the carbamoyltransferase activity confirmed albicidin as the substrate. The chemical synthesis of carbamoyl-albicidin finally enabled us to assess its bioactivity by means ofin vitrogyrase inhibition and antibacterial assays. Compared to albicidin, carbamoyl-albicidin showed a significantly higher inhibitory efficiency against bacterial gyrase (∼8 vs 49 nM), which identifies the carbamoyl group as an important structural feature of albicidin maturation.
一种多功能聚酮肽合成酶,对于白色黄单胞菌中白杀菌素生物合成至关重要。
DOI: --
发表时间: 2001
期刊: Microbiology
影响因子: 1.5
作者:
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通讯作者: R. G. Birch
DOI: 10.1042/bj1850555
发表时间: 1980-01-01
影响因子: 4.1
作者:
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DOI: 10.1038/nchembio.1734
发表时间: 2015-03-01
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发表时间: 2009-04-01
期刊: PLANT DISEASE
影响因子: 4.5
作者:
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通讯作者: Daugrois, J. -H.
DOI: 10.1002/anie.201409584
发表时间: 2015-02-02
影响因子: 16.6
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