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Stephane, ROLLAND
유전체 항상성 연구단
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Genome-wide RNAi screen for regulators of UPRmt in Caenorhabditis elegans mutants with defects in mitochondrial fusion

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Title
Genome-wide RNAi screen for regulators of UPRmt in Caenorhabditis elegans mutants with defects in mitochondrial fusion
Author(s)
Haeussler, Simon; Yeroslaviz, Assa; Stéphane G. Rolland; Luehr, Sebastian; Lambie, Eric J.; Conradt, Barbara
Publication Date
2021-07
Journal
G3: Genes, Genomes, Genetics, v.11, no.7
Publisher
Genetics Society of America
Abstract
© The Author(s) 2021. Published by Oxford University Press on behalf of Genetics Society of America.Mitochondrial dynamics plays an important role in mitochondrial quality control and the adaptation of metabolic activity in response to environmental changes. The disruption of mitochondrial dynamics has detrimental consequences for mitochondrial and cellular homeostasis and leads to the activation of the mitochondrial unfolded protein response (UPRmt), a quality control mechanism that adjusts cellular metabolism and restores homeostasis. To identify genes involved in the induction of UPRmt in response to a block in mitochondrial fusion, we performed a genome-wide RNAi screen in Caenorhabditis elegans mutants lacking the gene fzo-1, which encodes the ortholog of mammalian Mitofusin, and identified 299 suppressors and 86 enhancers. Approximately 90% of these 385 genes are conserved in humans, and one-third of the conserved genes have been implicated in human disease. Furthermore, many have roles in developmental processes, which suggests that mitochondrial function and their response to stress are defined during development and maintained throughout life. Our dataset primarily contains mitochondrial enhancers and non-mitochondrial suppressors of UPRmt, indicating that the maintenance of mitochondrial homeostasis has evolved as a critical cellular function, which, when disrupted, can be compensated for by many different cellular processes. Analysis of the subsets “non-mitochondrial enhancers” and “mitochondrial suppressors” suggests that organellar contact sites, especially between the ER and mitochondria, are of importance for mitochondrial homeostasis. In addition, we identified several genes involved in IP3 signaling that modulate UPRmt in fzo-1 mutants and found a potential link between pre-mRNA splicing and UPRmt activation.
URI
https://pr.ibs.re.kr/handle/8788114/10417
DOI
10.1093/g3journal/jkab095
ISSN
2160-1836
Appears in Collections:
Center for Genomic Integrity(유전체 항상성 연구단) > 1. Journal Papers (저널논문)
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