Antispacer peptide nucleic acids for sequence-specific CRISPR-Cas9 modulation.
Antispacer peptide nucleic acids for sequence-specific CRISPR-Cas9 modulation.
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DOI:
10.1093/nar/gkac095
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发表时间:
2022-06-10
影响因子:
14.9
通讯作者:
Glazer PM
中科院分区:
文献类型:
--
作者:
Economos NG;Quijano E;Carufe KEW;Perera JDR;Glazer PM
Despite the rapid and broad implementation of CRISPR-Cas9-based technologies, convenient tools to modulate dose, timing, and precision remain limited. Building on methods using synthetic peptide nucleic acids (PNAs) to bind RNA with unusually high affinity, we describe guide RNA (gRNA) spacer-targeted, or ‘antispacer’, PNAs as a tool to modulate Cas9 binding and activity in cells in a sequence-specific manner. We demonstrate that PNAs rapidly and efficiently target complexed gRNA spacer sequences at low doses and without design restriction for sequence-selective Cas9 inhibition. We further show that short PAM-proximal antispacer PNAs achieve potent cleavage inhibition (over 2000-fold reduction) and that PAM-distal PNAs modify gRNA affinity to promote on-target specificity. Finally, we apply antispacer PNAs for temporal regulation of two dCas9-fusion systems. These results present a novel rational approach to nucleoprotein engineering and describe a rapidly implementable antisense platform for CRISPR-Cas9 modulation to improve spatiotemporal versatility and safety across applications.
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