Photochemical Control of RNA Structure by Disrupting 蟺-Stacking

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• 作者：Marino J. E. Resendiz ; Arne Sch枚n ; Ernesto Freire ; Marc M. Greenberg
• 刊名：The Journal of the American Chemical Society
• 出版年：2012
• 出版时间：August 1, 2012
• 年：2012
• 卷：134
• 期：30
• 页码：12478-12481
• 全文大小：302K
• 年卷期：v.134,no.30(August 1, 2012)
• ISSN：1520-5126

文摘

Photolabile nucleotides that disrupt nucleic acid structure are useful mechanistic probes and can be used as tools for regulating biochemical processes. Previous probes can be limited by the need to incorporate multiple modified nucleotides into oligonucleotides and in kinetic studies by the rate-limiting step in the conversion to the native nucleotide. Photolysis of aryl sulfide 1 produces high yields of 5-methyluridine, and product formation is complete in less than a microsecond. Aryl sulfide 1 prevents RNA hairpin formation and complete folding of the preQ₁ class I riboswitch. Proper folding is achieved in each instance upon photolysis at 350 nm. Aryl sulfide 1 is a novel tool for modulating RNA structure, and formation of 5-methyluridine within a radical cage suggests that it will be useful in kinetic studies.