Selective binding of TAR RNA by a tat-derived β-peptide

Selective binding of TAR RNA by a tat-derived β-peptide
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DOI:
10.1021/ol034977v
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发表时间:
2003-10-02
期刊:
影响因子:
5.2
通讯作者:
Rana, TM
Rana, TM
中科院分区:
化学1区
文献类型:
--
作者:
Gelman, MA;Richter, S;Rana, TM

文献摘要

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HIV-1 Tat 蛋白和新生病毒基因组转录物中 TAR RNA 元件之间的相互作用是病毒复制所必需的。 11 个残基的 β 肽 (1) 是富含 Arg 区域 Tat 47-57 的全 β 同源物,以 K-d = 29 +/- 4 nM 结合 TAR RNA。所有 Arg 侧链均被 Lys 侧链取代的对照 β 肽 (2) 对野生型与凸出部分缺失的 TAR RNA 的亲和力增加,但特异性降低,1 和 2 的 α 肽类似物也是如此。
The interaction between the HIV-1 Tat protein and the TAR RNA element in the nascent viral genomic transcript is required for viral replication. An 11-residue beta-peptide (1), an all-beta homologue of the Arg-rich region Tat 47-57, binds TAR RNA with K-d = 29 +/- 4 nM. A control beta-peptide (2) in which all Arg side chains are replaced by Lys side chains shows increased affinity but decreased specificity for wild-type vs bulge-deleted TAR RNA, as do the alpha-peptide analogues of 1 and 2.