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。
Detailed binding sites of the antibiotics vancomycin and ristocetin A: determination of intermolecular distances in antibiotic/substrate complexes by use of the time-dependent NOE
作者:Dudley H. Williams、Michael P. Williamson、David W. Butcher、Stephen J. Hammond
DOI:10.1021/ja00343a043
日期:1983.3
NOVEL ANTIBIOTIC COMPOSITIONS
申请人:Inflazyme Pharmaceuticals, Ltd.
公开号:EP1996217A2
公开(公告)日:2008-12-03
EP1996217A4
申请人:——
公开号:EP1996217A4
公开(公告)日:2009-08-12
[EN] MULTIFUNCTIONAL POLYMERS FOR PROMOTION OF OPSONIZATION OF TARGET CELLS AND ORGANISMS<br/>[FR] POLYMERES MULTIFONCTIONNELS FAVORISANT L'OPSONISATION D'ORGANISMES ET DE CELLULES CIBLES
申请人:HARVARD COLLEGE
公开号:WO2007016556A1
公开(公告)日:2007-02-08
[EN] A multifunctional polymer is provided that presents groups capable of binding to and modifying the surfaces of bacteria, cancer cells, or other target cells or organisms. The polymer can be used to associate hapten moieties with the surface of the target cell or organism to promote opsonization and subsequent phagocytosis of the opsonized target cell or organism by macrophages. [FR] L'invention concerne un polymère multifonctionnel comportant des groupes capables de se lier à la surface de bactéries, de cellules cancéreuses, et d'autres organismes ou cellules cibles, et de la modifier. Ce polymère peut être utilisé pour associer des fonctions haptènes à la surface d'un organismes ou d'une cellule cible, afin de favoriser l'opsonisation et la phagocytose subséquente de l'organisme ou de la cellule cible opsonisée par des macrophages.