Why heat kills cells?

If the temperature rises above a certain threshold, the cell collapses and dies. One of the simplest explanations of this lack of heat is that the proteins necessary for life, are those which extract energy from food or sunlight, fighting with intruders, destroy waste and so on, are often incredibly exact in shape. They start with long chains that then fold into spirals and other configurations dictated by the sequence of their components. These forms play an important role in what they are doing. But when it starts to heat up, communication, support structures of proteins are destroyed: first the weak, then when the temperature rises, and strong. Obviously, the destruction of the protein structure should be deadly, but until recently the exact details of how or why it’s killing overheated cells was unknown.