Ypt1

Ypt1 is a small protein found in yeast cells that functions as a molecular switch to help transport and fuse vesicles—tiny sacs carrying materials within the cell. It belongs to a family called Rab GTPases, which regulate different transport pathways. When Ypt1 is active, it binds energy molecules called GTP, guiding vesicles to their correct destinations and facilitating their merging with target structures. This process is essential for proper cell function, such as protein sorting and secretion. In essence, Ypt1 ensures that materials are accurately moved and delivered inside the cell, maintaining cellular organization and health.