Clearing the outer mitochondrial membrane from harmful proteins via lipid droplets

0484574 - MBÚ 2018 RIV GB eng J - Journal Article
Bischof, J. - Salzmann, M. - Streubel, M.K. - Hašek, Jiří - Geltinger, F. - Duschl, J. - Bresgen, N. - Briza, P. - Hašková, Danuša - Lejsková, Renata - Sopjani, M. - Richter, K. - Rinnerthaler, M.
Clearing the outer mitochondrial membrane from harmful proteins via lipid droplets.
Cell Death Discovery. Roč. 3, March 20 (2017), č. článku 17016. E-ISSN 2058-7716
R&D Projects: GA ČR(CZ) GA16-05497S; GA MŠMT(CZ) 7AMB16AT006
Institutional support: RVO:61388971
Keywords : mitochondrial membrane * harmful proteins * lipid droplets
OECD category: Microbiology

In recent years it turned out that there is not only extensive communication between the nucleus and mitochondria but also between mitochondria and lipid droplets (LDs) as well. We were able to demonstrate that a number of proteins shuttle between LDs and mitochondria and it depends on the metabolic state of the cell on which organelle these proteins are predominantly localized. Responsible for the localization of the particular proteins is a protein domain consisting of two alfa-helices, which we termed V-domain according to the predicted structure. So far we have detected this domain in the following proteins: mammalian BAX, BCL-XL, TCTP and yeast Mmi1p and Erg6p. According to our experiments there are two functions of this domain: (1) shuttling of proteins to mitochondria in times of stress and apoptosis, (2) clearing the outer mitochondrial membrane from pro- as well as anti-apoptotic proteins by moving them to LDs after the stress ceases. In this way the LDs are used by the cell to modulate stress response.
Permanent Link: http://hdl.handle.net/11104/0280326