Our lab is interested in addressing a fundamental question of cell biology: How are organelles spatially organized? Mitochondria are especially fascinating to us because they perform a multitude of cellular functions that are dependent on the elaborate organization of their double membrane bilayer. In particular, mitochondrial energy production is directly linked to the shape of the organelle’s hallmark cristae membranes, which house the respiratory complexes that perform oxidative phosphorylation. We aim to elucidate the mechanisms that govern cristae organization within mitochondria and determine how cristae can dynamically remodel depending on cellular metabolic demand.
2012-2017 Postdoc, Cell and Molecular Biology, University of California Davis
2007-2012 Ph.D., Molecular Cell and Devolpmental Biology, University of Colorado Boulder
2001-2005 Bachelor of Arts, Biology, Washington University in St. Louis
- MICOS subcomplexes assemble independently on the mitochondrial inner membrane in proximity to ER contact sites.
- Tirrell PS, Nguyen KN, Luby-Phelps K, Friedman JR, J Cell Biol 2020 Nov 219 11
- Lipid Homeostasis Is Maintained by Dual Targeting of the Mitochondrial PE Biosynthesis Enzyme to the ER.
- Friedman JR, Kannan M, Toulmay A, Jan CH, Weissman JS, Prinz WA, Nunnari J Dev. Cell 2017 Dec
- MICOS coordinates with respiratory complexes and lipids to establish mitochondrial inner membrane architecture.
- Friedman JR, Mourier A, Yamada J, McCaffery JM, Nunnari J Elife 2015 Apr 4
- Mitochondrial form and function.
- Friedman JR, Nunnari J Nature 2014 Jan 505 7483 335-43
- Endoplasmic reticulum-endosome contact increases as endosomes traffic and mature.
- Friedman JR, Dibenedetto JR, West M, Rowland AA, Voeltz GK Mol. Biol. Cell 2013 Apr 24 7 1030-40
- ER tubules mark sites of mitochondrial division.
- Friedman JR, Lackner LL, West M, DiBenedetto JR, Nunnari J, Voeltz GK Science 2011 Oct 334 6054 358-62
- ER sliding dynamics and ER-mitochondrial contacts occur on acetylated microtubules.
- Friedman JR, Webster BM, Mastronarde DN, Verhey KJ, Voeltz GK J. Cell Biol. 2010 Aug 190 3 363-75
- Mitochondrial hepato-encephalopathy due to deficiency of QIL1/MIC13 (C19orf70), a MICOS complex subunit.
- Zeharia A, Friedman JR, Tobar A, Saada A, Konen O, Fellig Y, Shaag A, Nunnari J, Elpeleg O Eur. J. Hum. Genet. 2016 12 24 12 1778-1782
- MICOS and phospholipid transfer by Ups2-Mdm35 organize membrane lipid synthesis in mitochondria.
- Aaltonen MJ, Friedman JR, Osman C, Salin B, di Rago JP, Nunnari J, Langer T, Tatsuta T J. Cell Biol. 2016 Jun 213 5 525-34
- ER exit sites are physical and functional core autophagosome biogenesis components.
- Graef M, Friedman JR, Graham C, Babu M, Nunnari J Mol. Biol. Cell 2013 Sep 24 18 2918-31
Honors & Awards
- NIH Pathway to Independence Award (K99/R00)
- ASCB Beckman Coulter Distinguished Graduate Student Achievement Prize
- Harold Weintraub Graduate Student Award
- Jane Coffin Childs Memorial Fund Postdoctoral Fellowship