A Needle in a Base-Stack: Cas9 Structural Biology
Type
Blog Post
...interactions. It also can’t recognize PAMs, so it associates with random DNA sequences (Sternberg et al., ...sequencines. This helps explain why Cas9 can’t locate PAM sites until after RNA loading: the structure to interrogate...for complementarity with its guide RNA. But how to test DNA bases that are already snugly paired to each.... As mentioned above, however, Cas9 sometimes tolerates mismatches in the next 8-10 bases after perfect...conformations. This allows it to unwind the DNA and test for sequence complementarity with its guide RNA....California, San Francisco, with support from National Institutes of Health R01-GM129325 and the Office of Cyber...