在从益生元化学向生物学的转变过程中,一定发生了(寡)核苷酸的溶液相、非酶活化的时期,因此,磷酸盐活化的机制一定存在。在此,我们详细介绍了使用简单、益生元可用的腈类对益生元磷酸盐活化化学的研究结果,该腈类的反应性因 Cu 2+离子而增加。此外,尽管已知 Cu 2+离子可催化磷酸二酯键的水解,但我们发现这种有害活性几乎完全被氨基酸或二肽的抑制所抑制,这可能从一开始就表明蛋白质和 RNA 之间存在生产性关系。
Kinetics and mechanisms for reactions of adenosine 2'- and 3'-monophosphates in aqueous acid: competition between phosphate migration, dephosphorylation, and depurination
Conjugation of RNA <i>via</i> 2′-OH acylation: Mechanisms determining nucleotide reactivity
作者:Biswarup Jash、Eric T. Kool
DOI:10.1039/d2cc00660j
日期:——
The acylation reactivity of RNA 2′-OH groups has proven broadly useful for labeling and mapping RNA. Here we perform kinetics studies to test the mechanisms governing this reaction, and we find strong steric and inductive effects modulating reactivity. The results shedlight on new strategies for improved conjugation and mapping.
During the transition from prebiotic chemistry to biology, a period of solution-phase, non-enzymatic activation of (oligo)nucleotides must have occurred, and accordingly, a mechanism for phosphate activation must have existed. Herein, we detail results of an investigation into prebiotic phosphate activation chemistry using simple, prebiotically available nitriles whose reactivity is increased by Cu2+
在从益生元化学向生物学的转变过程中,一定发生了(寡)核苷酸的溶液相、非酶活化的时期,因此,磷酸盐活化的机制一定存在。在此,我们详细介绍了使用简单、益生元可用的腈类对益生元磷酸盐活化化学的研究结果,该腈类的反应性因 Cu 2+离子而增加。此外,尽管已知 Cu 2+离子可催化磷酸二酯键的水解,但我们发现这种有害活性几乎完全被氨基酸或二肽的抑制所抑制,这可能从一开始就表明蛋白质和 RNA 之间存在生产性关系。
Kinetics and mechanisms for reactions of adenosine 2'- and 3'-monophosphates in aqueous acid: competition between phosphate migration, dephosphorylation, and depurination