PUBLICATION
ES1 is a mitochondrial enlarging factor contributing to form mega-mitochondria in zebrafish cones
- Authors
- Masuda, T., Wada, Y., Kawamura, S.
- ID
- ZDB-PUB-160302-15
- Date
- 2016
- Source
- Scientific Reports 6: 22360 (Journal)
- Registered Authors
- Keywords
- Cellular neuroscience, Retina
- MeSH Terms
-
- Animals
- Eye Proteins/genetics
- Eye Proteins/metabolism*
- Mitochondria/physiology*
- Mitochondrial Proteins/genetics
- Mitochondrial Proteins/metabolism*
- Morpholinos/genetics
- Receptors, Estrogen
- Retinal Cone Photoreceptor Cells/metabolism*
- Zebrafish/metabolism*
- Zebrafish Proteins/genetics
- Zebrafish Proteins/metabolism*
- PubMed
- 26926452 Full text @ Sci. Rep.
Citation
Masuda, T., Wada, Y., Kawamura, S. (2016) ES1 is a mitochondrial enlarging factor contributing to form mega-mitochondria in zebrafish cones. Scientific Reports. 6:22360.
Abstract
Total mass of mitochondria increases during cell proliferation and differentiation through mitochondrial biogenesis, which includes mitochondrial proliferation and growth. During the mitochondrial growth, individual mitochondria have been considered to be enlarged independently of mitochondrial fusion. However, molecular basis for this enlarging process has been poorly understood. Cone photoreceptor cells in the retina possess large mitochondria, so-called mega-mitochondria that have been considered to arise via the enlarging process. Here we show that ES1 is a novel mitochondria-enlarging factor contributing to form mega-mitochondria in cones. ES1 is specifically expressed in cones and localized to mitochondria including mega-mitochondria. Knockdown of ES1 markedly reduced the mitochondrial size in cones. In contrast, ectopic expression of ES1 in rods significantly increased both the size of individual mitochondria and the total mass of the mitochondrial cluster without changing the number of them. RNA-seq analysis showed that ERRα and its downstream mitochondrial genes were significantly up-regulated in the ES1-expressing rods, suggesting facilitation of mitochondrial enlargement via ERRα-dependent processes. Furthermore, higher energy state was detected in the ES1-expressing rods, indicating that the enlarged mitochondria by ES1 are capable of producing high energy. ES1 is the mitochondrial protein that is first found to promote enlargement of individual mitochondria.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping