Even the best AI is getting it wrong—AlphaFold is dreaming up protein structures that literally break the laws of chemistry.
bioRxiv · March 13, 2026 · 10.64898/2026.03.11.711144
Why it matters
While AI is often credited with 'solving' the mystery of how life's building blocks fold, this research shows these models frequently place electrically charged molecules in a protein's dry, non-polar core—a physical impossibility. This reveals that AI is mimicking biological shapes without actually understanding the physical rules that make life possible.
From the abstract
A variant of the U1A protein containing four substitutions to ionizable residues was generated serendipitously due to a miscommunication. Biophysical measurements show that this variant has at least twice as much helical structure as the wild-type U1A and is trimeric in solution, in contrast to the monomeric wild type. In sharp contrast, structures predicted by deep-learning AI tools (AlphaFold2 and RoseTTAFold2) and transformer-based tools (OmegaFold and ESMFold) are all highly similar to the w