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hFis1, a Novel Component of the Mammalian Mitochondrial Fission Machinery

Open access
James, Dominic I., Parone, Philippe A., Mattenberger, Yves, Martinou, Jean-Claude·2003·Journal of Biological Chemistry

Abstract

The balance between the fission and fusion mechanisms regulate the morphology of mitochondria. In this study we have identified a mammalian protein that we call hFis1, which is the orthologue of the yeast Fis1p known to participate in yeast mitochondrial division. hFis1, when overexpressed in various cell types, localized to the outer mitochondrial membrane and induced mitochondrial fission. This event was inhibited by a dominant negative mutant of Drp1 (Drp1(K38A)), a major component of the fission apparatus. Fragmentation of the mitochondrial network by hFis1 was followed by the release of cytochrome c and ultimately apoptosis. Bcl-xL was able to block cytochrome c release and apoptosis but failed to prevent mitochondrial fragmentation. Our studies show that hFis1 is part of the mammalian fission machinery and suggest that regulation of the fission processes might be involved in apoptotic mechanisms.

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Metadata

Authors
James, D. I., Parone, P. A., Mattenberger, Y., & Martinou, J.-C.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2003-09
Volume
278
Issue
38
Pages
36373-36379
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1966241472
Cited by
652
References
4
FWCI
8.47
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: hFis1, a Novel Component of the Mammalian Mitochondrial Fission Machinery. https://app.cochat.ai/papers/10.1074/jbc.m303758200
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James, D. I., Parone, P. A., Mattenberger, Y., & Martinou, J.-C. (2003). hFis1, a Novel Component of the Mammalian Mitochondrial Fission Machinery. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m303758200

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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