Subtle differences in molecular recognition between modified glycopeptide antibiotics and bacterial receptor peptides identified by electrospray ionization mass spectrometry
摘要:
在确定结构-活性关系时,如果可以从含有配体和目标分子混合物的单一水溶液中直接获得各种配体与给定目标分子的结合常数,则是有利的。本文提供的进一步证据表明,电喷雾电离质谱 (ESI-MS) 可用于万古霉素类抗生素及其细菌细胞壁受体混合物的快速定量分析,从而能够识别结合常数的细微差异。对万古霉素抗生素混合物(万古霉素、去氯万古霉素和 N-去甲基万古霉素)以及瑞斯托菌素 A 及其假苷元的混合物的亲和力差异进行定量。发现通过 ESI-MS 测定的结合常数与在水溶液中通过更直接的方法测定的结合常数非常一致。
Inhibition of iodine-125 labeled ristocetin binding to Micrococcus luteus cells by the peptides related to bacterial cell wall mucopeptide precursors: quantitative structure-activity relationships
作者:Ki-Hwan Kim、Yvonne Martin、Ellen Otis、James Mao
DOI:10.1021/jm00121a018
日期:1989.1
Quantitative structure-activityrelationships (QSAR) of N-Ac amino acids, N-Ac dipeptides, and N-Ac tripeptides in inhibition of 125I-labeled ristocetin binding to Micrococcus luteus cell wall have been developed to probe the details of the binding between ristocetin and N-acetylated peptides. The correlationequations indicate that (1) the binding is stronger for peptides in which the side chain of
Subtle differences in molecular recognition between modified glycopeptide antibiotics and bacterial receptor peptides identified by electrospray ionization mass spectrometry
作者:Thomas J. D. Jørgensen、Thomas Staroske、Peter Roepstorff、Dudley H. Williams、Albert J. R. Heck
DOI:10.1039/a904504j
日期:——
In determining structure–activity relationships, it is advantageous if binding constants for a variety of ligands to a given target molecule can be directly obtained from a single aqueous solution containing a mixture of ligands and the target molecule. In this paper further evidence is provided showing that electrospray ionization mass spectrometry (ESI-MS) can be used in the rapid quantitative analysis of mixtures of vancomycin-group antibiotics and their bacterial cell-wall receptors allowing the identification of even subtle differences in binding constants. Differences in affinities are quantified for a mixture of vancomycin antibiotics (vancomycin, dechlorovancomycin and N-demethylvancomycin) and for a mixture of ristocetin A and its pseudoaglycone. Binding constants determined by ESI-MS were found to be in close agreement with those determined by more direct methods in aqueous solution.
在确定结构-活性关系时,如果可以从含有配体和目标分子混合物的单一水溶液中直接获得各种配体与给定目标分子的结合常数,则是有利的。本文提供的进一步证据表明,电喷雾电离质谱 (ESI-MS) 可用于万古霉素类抗生素及其细菌细胞壁受体混合物的快速定量分析,从而能够识别结合常数的细微差异。对万古霉素抗生素混合物(万古霉素、去氯万古霉素和 N-去甲基万古霉素)以及瑞斯托菌素 A 及其假苷元的混合物的亲和力差异进行定量。发现通过 ESI-MS 测定的结合常数与在水溶液中通过更直接的方法测定的结合常数非常一致。