PT - JOURNAL ARTICLE AU - Thomenius, Michael J. AU - Distelhorst, Clark W. TI - Bcl-2 on the endoplasmic reticulum: protecting the mitochondria from a distance AID - 10.1242/jcs.00829 DP - 2003 Nov 15 TA - Journal of Cell Science PG - 4493--4499 VI - 116 IP - 22 4099 - http://jcs.biologists.org/content/116/22/4493.short 4100 - http://jcs.biologists.org/content/116/22/4493.full SO - J. Cell Sci.2003 Nov 15; 116 AB - Bcl-2 has been described both as an inhibitor of programmed cell death and as an inhibitor of mitochondrial dysfunction during apoptosis. It is still not clear what biochemical activity of Bcl-2 is responsible for its function, but increasing evidence indicates that a functional activity of Bcl-2 on the endoplasmic reticulum (ER) protects mitochondria under diverse circumstances. Indeed, an emerging hypothesis is that, during apoptosis, the Bcl-2 family regulates ER-to-mitochondrion communication by BH3-only proteins and calcium ions and thereby triggers mitochondrial dysfunction and cell death.