Sequence selective recognition of double-stranded RNA at physiologically relevant conditions using PNA-peptide conjugates.

Sequence selective recognition of double-stranded RNA at physiologically relevant conditions using PNA-peptide conjugates.
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DOI:
10.1021/cb400144x
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发表时间:
2013-08-16
影响因子:
4
通讯作者:
Rozners, Eriks
Rozners, Eriks
中科院分区:
生物学2区
文献类型:
--
作者:
Muse, Oluwatoyosi;Zengeya, Thomas;Mwaura, Juddy;Hnedzko, Dziyana;McGee, Dennis W.;Grewer, Christof T.;Rozners, Eriks

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在生理相关条件下,短肽核酸(PNA)与四赖氨酸肽的缀合强烈增强了与RNA的三螺旋结合。携带阳离子核碱基和四赖氨酸修饰的PNA六聚体和七聚体显示出对互补双链RNA的高结合亲和力,而不损害序列选择性。PNA-肽缀合物对结合双链RNA具有独特的偏好,而对双链DNA具有很小的亲和力(如果有的话)。阳离子PNA被HEK 293细胞有效摄取,而未修饰的PNA几乎没有摄取。
Conjugation of short peptide nucleic acids (PNA) with tetralysine peptides strongly enhanced triple helical binding to RNA at physiologically relevant conditions. The PNA hexamers and heptamers carrying cationic nucleobase and tetralysine modifications displayed high binding affinity for complementary double-stranded RNA without compromising sequence selectivity. The PNA-peptide conjugates had unique preference for binding double-stranded RNA, while having little, if any, affinity for double-stranded DNA. The cationic PNAs were efficiently taken up by HEK293 cells, while little uptake was observed for unmodified PNA.
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