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New cellular surprise may help scientists better understand human mitochondrial diseases
Date:9/6/2011

Mitochondrial defects have been linked to a wide range of degenerative conditions and diseases, including diabetes, cardiovascular disease and stroke. "Our studies suggest the possibility that human mitochondrial diseases could result from disruption or excessive contact between the endoplasmic reticulum and the mitochondria."

Previous work, including research in Nunnari's lab at UC-Davis, has shown that mitochondrial division is regulated by a protein known as "dynamine-related protein-1" that assembles into a noose-like ligature that tightens around individual mitochondrion, causing it to divide. The team found that several additional proteins linked to mitochondrial division also were found where the endoplasmic reticulum and mitochondria touched.

"The new function for the endoplasmic reticulum expands and transforms our view of cell organization," said Nunnari, a professor and chair of molecular cell biology at UC-Davis. "It's a paradigm shift in cell biology."


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Contact: Gia Voeltz
gia.voeltz@colorado.edu
303-492-3145
University of Colorado at Boulder
Source:Eurekalert  

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