AI reveals new class of cellular 'off switch' linked to cancer pathways (news.cornell.edu)

Cornell University researchers have leveraged artificial intelligence to identify a new regulatory function of the protein Avl9, which acts as an "off switch" for Arf1, a key protein involved in intracellular transport. Published in the Journal of Cell Biology, this groundbreaking study reveals Avl9's role in ensuring proper protein movement within cells, a process that is critical for cellular organization and is frequently disrupted in cancer. By utilizing AlphaFold, an AI tool for predicting protein structures, the researchers quickly generated a shortlist of protein interactions for further validation, drastically reducing the time required for discovery compared to traditional lab methods. This finding is significant as it uncovers a previously unknown mechanism that cells use to regulate Arf1, challenging existing assumptions about the roles of DENN domain proteins, which were thought to primarily function as "on switches." The researchers confirmed that Avl9 not only regulates Arf1 but also linked its function to cancer cell movement, suggesting a broader system of protein interactions could influence tumor growth and spread. This advancement in using AI for biological discovery not only streamlines research efforts but also enables scientists to explore new avenues in understanding cellular processes and related diseases.