Identification and isolation of lantibiotics from culture: a bioorthogonal chemistry approach
作者:Jing Li、Genevieve Girard、Bogdan I. Florea、Paul P. Geurink、Nan Li、Gijsbert A. van der Marel、Mark Overhand、Herman S. Overkleeft、Gilles P. van Wezel
DOI:10.1039/c2ob26050f
日期:——
A distinguishing feature of the lantibiotic family of cyclic peptides is the presence of thioethers. Treatment of a lantibiotic with an alkaline solution at high pH gives rise to a β-elimination reaction yielding the corresponding ring opened precursor, containing a dehydro-amino acid residue. We here reveal in a proof-of-concept study that a ring opened lantibiotic (mersacidin) can be captured for pull-down from a culture broth, subsequently released and identified by mass spectrometry.
羊蛋白质家族的一个显著特征是存在硫醚。在碱性溶液中,在较高pH值下处理羊蛋白质会发生β-消除反应,产生相应的环开裂前体,包含一个脱氢氨基酸残基。在此,我们在概念验证研究中揭示了环开裂的羊蛋白质(mersacidin)可以从培养液中被捕获并拉下来,随后通过质谱法释放和鉴定。