ER Tubules Mark Sites of Mitochondrial Division

Overview

Journal Science

Specialty Science

Date 2011 Sep 3

PMID 21885730

Citations 1032

Authors

Jonathan R Friedman

Laura L Lackner

Matthew West

Jared R Dibenedetto

Jodi Nunnari

Gia K Voeltz

Affiliations

Soon will be listed here.

Abstract

Mitochondrial structure and distribution are regulated by division and fusion events. Mitochondrial division is regulated by Dnm1/Drp1, a dynamin-related protein that forms helices around mitochondria to mediate fission. Little is known about what determines sites of mitochondrial fission within the mitochondrial network. The endoplasmic reticulum (ER) and mitochondria exhibit tightly coupled dynamics and have extensive contacts. We tested whether ER plays a role in mitochondrial division. We found that mitochondrial division occurred at positions where ER tubules contacted mitochondria and mediated constriction before Drp1 recruitment. Thus, ER tubules may play an active role in defining the position of mitochondrial division sites.

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