Binding Events of (S)-N-(3-Oxo-octanoyl)-homoserine Lactone with Agrobacterium tumefaciens Mutant Cells Studied by Saturation Transfer Difference NMR

Journal of the Brazilian Chemical Society

Cabeça, Luís Fernando¹  Marsaioli, Anita J.¹  Pomini, Armando Mateus¹  University of Campinas, Campinas, Brazil¹  Cruz, Pedro Luiz R.¹ 

关键词: STD-NMR;    acyl-homoserine lactone;    membrane interactions;   

DOI  :  10.1590/S0103-50532011000400013

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

Quorum-sensing is a widely studied communication phenomenon in bacteria, which involves the production and detection of signaling substances in relation with cell density and colony behavior. Herein, the membrane binding interactions of the signal (S)-N-(3-oxo-octanoyl)-HSL with A. tumefaciens NTL4(pZLR4) cells were studied using saturation transfer difference NMR spectroscopy (STD-NMR). The substance epitope map was obtained showing that the hydrophobic acyl chain is the most important interacting site for the signal and the cell membrane. Results were interpreted upon comparisons with a simpler system, using liposomes as membrane models. Some insights on the use of β-cyclodextrin as acyl-HSL carrier were also provided.

【 授权许可】

Unknown