DNAzyme-mediated catalysis with only guanosine and cytidine nucleotides.

DNAzyme-mediated catalysis with only guanosine and cytidine nucleotides.
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DOI:
10.1093/nar/gkn930
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发表时间:
2009-02
影响因子:
14.9
通讯作者:
Li, Yingfu
Li, Yingfu
中科院分区:
生物学2区
文献类型:
--
作者:
Schlosser, Kenny;Li, Yingfu

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单链DNA分子具有采用被称为DNA酶的催化活性结构的能力,尽管这种能力的基本限制尚未确定。从由所有四种类型的标准核苷酸组成的亲本DNA酶开始,我们对周围的序列空间进行了搜索,以鉴定具有仅由三种类型的核苷酸组成的催化核心的功能衍生物,并且随后仅由两种类型的核苷酸组成。我们提供了第一份报告的DNAzyme,只包含鸟苷和胞苷脱氧核糖核苷酸在其催化结构域,其中仅由13个核苷酸。这种DNAzyme催化RNA磷酸二酯键的Mn 2+依赖性切割比相应的未催化反应快约5300倍,但比亲本慢约10000倍。由二进制核苷酸字母表制成的催化DNA分子的展示拓宽了我们对核酸介导的催化作用的基本限制的理解。
Single-stranded DNA molecules have the capacity to adopt catalytically active structures known as DNAzymes, although the fundamental limits of this ability have not been determined. Starting with a parent DNAzyme composed of all four types of standard nucleotides, we conducted a search of the surrounding sequence space to identify functional derivatives with catalytic cores composed of only three, and subsequently only two types of nucleotides. We provide the first report of a DNAzyme that contains only guanosine and cytidine deoxyribonucleotides in its catalytic domain, which consists of just 13 nucleotides. This DNAzyme catalyzes the Mn2+-dependent cleavage of an RNA phosphodiester bond ∼5300-fold faster than the corresponding uncatalyzed reaction, but ∼10 000-fold slower than the parent. The demonstration of a catalytic DNA molecule made from a binary nucleotide alphabet broadens our understanding of the fundamental limits of nucleic-acid-mediated catalysis.
DOI: 10.1093/nar/gkn396
发表时间: 2008-08
影响因子: 14.9
作者:
Schlosser K;Gu J;Lam JC;Li Y
通讯作者: Li Y
DOI: 10.1073/pnas.94.9.4262
发表时间: 1997-04-29
影响因子: 11.1
作者:
Santoro, SW;Joyce, GF
通讯作者: Joyce, GF
DOI: 10.1007/s00018-008-8029-y
发表时间: 2008-07
期刊: Cellular and molecular life sciences : CMLS
影响因子: --
作者:
Baum DA;Silverman SK
通讯作者: Silverman SK
DOI: 10.1261/rna.5670703
发表时间: 2003-08-01
期刊: RNA
影响因子: 4.5
作者:
Breaker, RR;Emilsson, GM;Sudarsan, N
通讯作者: Sudarsan, N
DOI: 10.1021/ja990592p
发表时间: 1999-06-16
影响因子: 15
作者:
Li, YF;Breaker, RR
通讯作者: Breaker, RR