From a Primitive Energy Sensor to the Master Guardian of Cellular Energy Long before animals, plants, or the first eukaryotic cells existed, bacteria and archaea already decided the best to use their energy. Every cell continuously judged whether enough ATP was available to build new molecules, or whether scarce resources demanded conservation and repair instead. Early life responded to energy availability, but it did so through many separate, local biochemical sensors rather

Increasing Intelligence of mTOR: From a Primitive Survival Kinase to the Master Integrator of Complex Life The story of mTOR shows that biology builds increasingly intelligent molecules not by inventing entirely new molecules, but by continuously expanding the information-processing abilities of existing ones. Today, mTOR (mechanistic Target of Rapamycin) is near the top of the regulatory hierarchy of virtually every human cell. It decides whether cells should grow or shrink,

For more than a century, biology has largely viewed cellular communication as a chemical process. This chemical view has been very helpful in describing a large number of cellular signaling pathways. However, modern cell biology increasingly reveals a deeper reality. Cells are not simply bags of chemicals. They are highly organized information-processing systems operating across many scales simultaneously. Within every cell, billions of molecules continuously exchange infor