%0 Journal Article %T Genetic editing and interrogation with Cpf1 and caged truncated pre-tRNA-like crRNA in mammalian cells %A Jiangtao Ren %A Linping Xu %A Quanli Gao %A Ruihua Fan %A Xiaodong Lyu %A Xuhua Zhang %A Yongping Song %A Yunfeng Song %J Archive of "Cell Discovery". %D 2018 %R 10.1038/s41421-018-0035-0 %X a Structures of conventional crRNA, caged crRNA (caRNA), and caged truncated pre-tRNA-like crRNA (catRNA) transcribed by Pol III and Pol II polymerases. Red, crRNA spacer sequence. Oligo-T (Pol III) or oligo-T-Poly A (Pol II) are incorporated into crRNA but not caRNA or catRNA. b Structures of pre-tRNA and truncated pre-tRNA. Pre-tRNA is matured by RNase P by removal of the leader sequence and subsequently modified and processed by RNase Z. RNase P processing is blocked by disrupting the 7-base pair stem structure of pre-tRNA, which is critical for RNase P recognition and cleavage. Subsequent RNase Z cleavage is also abolished due to RNase P processing failure. c Illustration of the RNase-resistant property of catRN %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6037731/