Characterization and carbohydrate specificity of pradimicin S.
Characterization and carbohydrate specificity of pradimicin S.
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pradimicin S 的表征和碳水化合物特异性。
DOI:
10.1021/ja303860m
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发表时间:
2012
影响因子:
15
通讯作者:
Bewley,CaroleA
中科院分区:
文献类型:
--
作者:
Shahzad-ul-Hussan,Syed;Ghirlando,Rodolfo;Dogo-Isonagie,CajetanI;Igarashi,Yasuhiro;Balzarini,Jan;Bewley,CaroleA
The pradimicin family of antibiotics is attracting attention due to its anti-infective properties and as a model for understanding the requirements for carbohydrate recognition by small molecules. Members of the pradimicin family are unique among natural products in their ability to bind sugars in a Ca2+-dependent manner, but the oligomerization to insoluble aggregates that occurs upon Ca2+binding has prevented detailed characterization of their carbohydrate specificity and biologically relevant form. Here we take advantage of the water solubility of pradimicin S (PRM-S), a sulfated glucose-containing analogue of pradimicin A (PRM-A), to show by NMR spectroscopy and analytical ultracentrifugation that at biologically relevant concentrations, PRM-S binds Ca2+to form a tetrameric species that selectively binds and engulfs the trisaccharide Manα1–3(Manα1–6)Man over mannose or mannobiose. In functional HIV-1 entry assays, IC50values of 2–4 μM for PRM-S corrrelate with the concentrations at which oligomerization occurs as well as the affinities with which PRM-S binds the HIV surface envelope glycoprotein gp120. Together these data reveal the biologically active form of PRM-S, provide an explanation for previous speculations that PRM-A may contain a second mannose binding site, and expand our understanding of the characteristics that can engender a small molecule with the ability to function as a carbohydrate receptor.
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影响因子:
64.8
作者:
S. O’Brien;T. Bonner;Maurice Cohen;C. O'Connell;W. Nash
通讯作者:
W. Nash
影响因子:
64.5
作者:
J. Schwarzbauer;J. Tamkun;I. Lemischka;R. Hynes
通讯作者:
R. Hynes
DOI:
--
发表时间:
1986
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Friesel,R;Burgess,WH;Mehlman,T;Maciag,T
通讯作者:
Maciag,T
影响因子:
64.8
作者:
S. O’Brien;W. Nash;Jerome L. Goodwin;D. Lowy;E. Chang
通讯作者:
E. Chang
影响因子:
64.8
作者:
N. Campbell;P. Reade;B. Radden
通讯作者:
B. Radden