The interactions between proteins and RNAs are of vital importance for many cellular processes, including transcription and processing of RNA, translation, and viral infections. Here we report an γ-AApeptide that can mimic HIV-1 Tat protein and bind to TAR RNAs of HIV and BIV with nanomolar affinity, comparable to that of the RNA-binding fragment of Tat (amino acids 49â58). The interaction is resistant to the presence of a large excess of tRNA. With resistance to proteolytic hydrolysis and limitless potential for diversification, γ-AApeptides may emerge as a new class of peptidomimetics to modulate RNA-protein interactions.
蛋白质与RNA之间的相互作用对许多细胞过程至关重要,包括RNA的转录和加工、翻译以及病毒感染。我们在这里报道一种γ-
AA肽,它能够模拟HIV-1 TAt蛋白,并以纳摩尔亲和力结合HIV和BIV的TAR RNA,这一亲和力与TAt的RNA结合片段(
氨基酸49-58)相当。该相互作用能抵抗大量tRNA的存在。由于对蛋白
水解的抵抗以及无限的多样化潜力,γ-
AA肽可能会成为调节RNA-蛋白相互作用的新型肽模仿物。