ByBalázs Csoma, Hungarian Research Network CRISPR nucleases are remarkably precise molecular tools for cutting DNA. But “remarkably precise” does not mean “perfectly specific.” In reality, CRISPR nucleases occasionally make mistakes and cleave DNA sequences that only resemble ...
These days, it hardly seems like we finish writing about one dual CRISPR-transposon system before another exciting new advance emerges! The programmability and targeting power of CRISPR combined with the large sequence capacity of transposons open whole new worlds to explore. ...
Over 75,000 pathogenic genetic variants have been identified in humans and cataloged in the ClinVar database. Previously developed genome editing methods using nucleases and base editors have the potential to correct only a minority of those variants in most cell types. But ...
Have you ever designed a CRISPR guide RNA and wondered why it is limited to only 20 bases, or why it’s so important to choose a target sequence with a nearby protospacer-adjacent motif (PAM)? Cas9 is becoming an ever more ubiquitous tool for genome engineering, and studying its ...
This post was originally written by Joel McDade and significantly updated in 2022 by Susanna Stroik. The advent of CRISPR/Cas9 has made it easier than ever to make precise, targeted genome modifications. Cas9 has been modified to enable researchers to knock out, knock in, base ...
This post was contributed by guest blogger Daniel M. Sapozhnikov, a graduate student in the laboratory of Dr. Moshe Szyf at McGill University. Some enzymatic fusions are godsends. Tethering dCas9 to the histone acetyltransferase p300 or the DNA methyltransferase DNMT3A allows ...
Originally published Nov 12, 2015 and last updated Aug 20, 2020. Cas9 can be used to modify any desired genomic target provided that (1) the sequence is unique compared to the rest of the genome and (2) the sequence is located just upstream of a Protospacer Adjacent Motif (PAM ...
Originally published Nov 30, 2017 and updated Jul 31, 2020. Cas13 enzymes are quickly becoming major players in the CRISPR field. Just a year after Feng Zhang’s lab identified Cas13a (C2c2) (Abudayyeh et al., 2016) as a RNA-targeting CRISPR enzyme, they adapted Cas13b for ...
