This book surveys the current knowledge concerning the expression and function of small stress proteins (sHsps) in different organisms, ranging from prokaryotes to humans. It provides an overview of the diversity and complex evolutionary history of sHsps and describes their function and expression in different eukaryote models. Additional chapters discuss the involvement of sHsps in pathological conditions and gene therapy approaches towards a control of sHsp expression levels.

Studies have identified important families of proteins (denoted: heat shock or stress proteins, Hsps) which display an enhanced expression in response to heat shock or other physiological stresses. Besides the characterization of the genes encoding Hsp and the mechanisms of their induction, recent studies have concentrated on the function of these proteins. It was shown that the expression of Hsp protects the cell against different types of aggressions. In addition, Hsp can regulate essential biochemical processes in unstressed cells. For example, members of the Hsp60 and Hsp70 families act...