Аннотация:Mitochondria are dynamic organelles whose homeostasis is defined by two opposite processes: fission (or fragmentation), or fusion. Fission of mitochondria results in generation of smaller organelles and fusion is when they produce tubular or net-like structures. Although a number of proteins are already known to control the process of fission/fusion additional regulators controlling these processes are being found. The Bcl-2 family members take part in the regulation of apoptosis and according to the current view are involved in the mitochondrial net-like structure maintenance. In this review we will discuss mechanisms of mitochondrial fission/fusion regulation and summarize the available information on the role of Bcl-2 family members in the regulation of mitochondrial fission/fusion dynamics.