Martin Pacesa Profile picture
Structural biologist working on 🖥️ protein design, AI, and #CRISPR-Cas gene editing ✂️🧬 Avid weirdness connoisseur 🎩
Mar 8, 2024 6 tweets 2 min read
THEY SAID WE COULDN'T DO IT........well, no one actually said that. But in our updated manuscript with @CasperGoverde, @GoldbachNico, and @befcorreia we show you can now design soluble analogues of membrane proteins with preserved functional features!

biorxiv.org/content/10.110…
Image While fixing functional sites during design, we can recapitulate complex interaction sites, such as the Clostridium perfringens enterotoxin binding site on claudins and maintain toxin binding in solution with affinities comparable to its membrane counterpart. Image
Dec 14, 2021 6 tweets 3 min read
I decided to release a couple of figures from my PhD thesis, perhaps they might be useful to someone! First off is a remake of the famous Makarova et al. 2020 CRISPR classification. This one also includes a schematic of the targeted nucleic acid. Next off we have structural renderings and domain schematics of Class 2 effectors released at the time of writing (missed Cas12k then). PDBs: 6O0Z, 6I1K, 5U30, 6NY2, 7C7L, 6XMG, 6W5C, 5XWP
Nov 19, 2021 12 tweets 5 min read
I am happy to conclude my trilogy on Cas9 specificity with our new preprint from the @MartinJinek lab! We solved a staggering number (15!) of crystal structures of Cas9 bound to bona fide off-targets to investigate the nature of mismatch tolerance.

biorxiv.org/content/10.110… We observe that mismatch tolerance is primarily facilitated by the formation of non-canonical base pairs within the heteroduplex. This effect is dependent on the type of mismatch, the surrounding nucleotides, and its position within the duplex.