Format

Send to

Choose Destination
Mol Cell. 2019 Jan 17;73(2):364-376.e8. doi: 10.1016/j.molcel.2018.11.009. Epub 2018 Dec 20.

Drp1-Zip1 Interaction Regulates Mitochondrial Quality Surveillance System.

Author information

1
Department of Anatomy, Korea University College of Medicine, Brain Korea 21 plus, Seoul 02841, Republic of Korea.
2
Department of Biology, Kyung Hee University, Seoul 02447, Republic of Korea.
3
Department of Physiology, Ajou University School of Medicine, Suwon, Gyeonggi-do, Republic of Korea.
4
Department of Brain & Cognitive Sciences, Daegu Gyeongbuk Institute of Science and Technology, 333 Techno Jungang-daero, Hyeonpung-myeon, Dalseong-gun, Daegu 42988, Republic of Korea.
5
Department of Anatomy, Korea University College of Medicine, Brain Korea 21 plus, Seoul 02841, Republic of Korea. Electronic address: woongsun@korea.ac.kr.

Abstract

Mitophagy, a mitochondrial quality control process for eliminating dysfunctional mitochondria, can be induced by a response of dynamin-related protein 1 (Drp1) to a reduction in mitochondrial membrane potential (MMP) and mitochondrial division. However, the coordination between MMP and mitochondrial division for selecting the damaged portion of the mitochondrial network is less understood. Here, we found that MMP is reduced focally at a fission site by the Drp1 recruitment, which is initiated by the interaction of Drp1 with mitochondrial zinc transporter Zip1 and Zn2+ entry through the Zip1-MCU complex. After division, healthy mitochondria restore MMP levels and participate in the fusion-fission cycle again, but mitochondria that fail to restore MMP undergo mitophagy. Thus, interfering with the interaction between Drp1 and Zip1 blocks the reduction of MMP and the subsequent mitophagic selection of damaged mitochondria. These results suggest that Drp1-dependent fission provides selective pressure for eliminating "bad sectors" in the mitochondrial network, serving as a mitochondrial quality surveillance system.

KEYWORDS:

Drp1; Zip1; mitochondrial fission; mitochondrial membrane potential; mitochondrial quality control; mitochondrial quality surveillance; mitophagy

PMID:
30581142
DOI:
10.1016/j.molcel.2018.11.009
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center