AI-designed makes it sound like an LLM came up with an idea. If you follow the links you'll get to the paper where you can see the list of authors who are doing protein design.
I suppose protein design does use generative AI algorithms, but it's not thinking or coming up with anything. It's mostly just getting the atom positions more correct. In fact this one was super heavily restricted and still filtered a ton of garbage out. Frankly, it's not even impressive as protein design goes as it's barely a new protein. Maybe the predicting future variants is sorta impressive, but we've been doing that for years now.
Honestly, I wonder how the first author feels about this. I can't speak for them, but as someone who does protein design, if some journalist attributed my work to AI, I'd have a conniption fit.