2-methyladenosine-substituted 2′,5′-oligoadenylates:: Conformations, 2-5A binding and catalytic activities with human ribonuclease L

被引:6
|
作者
Kitade, Y [1 ]
Wakana, M
Tsuboi, T
Yatome, C
Bayly, SF
Player, MR
Torrence, PF
机构
[1] Gifu Univ, Fac Engn, Dept Biomol Sci, Lab Mol Biochem, Gifu 5011193, Japan
[2] NIDDKD, Sect Biomed Chem, Med Chem Lab, NIH, Bethesda, MD 20892 USA
[3] No Arizona Univ, Dept Chem, Flagstaff, AZ 86011 USA
关键词
D O I
10.1016/S0960-894X(99)00703-9
中图分类号
R914 [药物化学];
学科分类号
100701 ;
摘要
2-Methyladenosine-substituted analogues of 2-5A, p5'A2'p5'A2'p5'(me(2)A), p5'(me(2)A)2'p5'A2'p5'A, and p5'(me(2)A) 2'p5'(me(2)A)2'p5'(me(2)A), were prepared via a modification of a lead ion-catalyzed ligation reaction. These 5'-monophosphates were subsequently converted into the corresponding 5'-triphosphates. Both binding and activation of human recombinant RNase L by various 2-methyladenosine-substituted 2-5A analogues were examined. Among the 2-5A analogues, p5'A2'p5'A2'p5'(me(2)A) showed the strongest binding affinity and was as effective as 2-5A itself as an activator of RNase L. The CD spectra of both p5'(me(2)A)2'p5'A2'p5'A and p5'A2'p5'A2'p5'(me(2)A) were superimposable on that of p5'A2'p5'A2'p5'A. indicative of an anti orientation about the base-glycoside bonds as in naturally occurring 2-5A. (C) 2000 Elsevier Science Ltd. All rights reserved.
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收藏
页码:329 / 331
页数:3
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