Cited by 111Mitochondrial Function and PathologyCell death mechanisms and regulationDNA Repair Mechanisms

Generation and Characterization of Endonuclease G Null Mice

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Irvine, Ryan A., Adachi, Noritaka, Shibata, Darryl K., Cassell, Geoffrey D., Yu, Kefei, Karanjawala, Zarir E., Hsieh, Chih-Lin, Lieber, Michael R.·2005·Molecular and Cellular Biology

Abstract

Endonuclease G (endo G) is one of the most abundant nucleases in eukaryotic cells. It is encoded in the nucleus and imported to the mitochondrial intermembrane space. This nuclease is active on single- and double-stranded DNA. We genetically disrupted the endo G gene in mice without disturbing a conserved, overlapping gene of unknown function that is oriented tail to tail with the endo G gene. In these mice, the production of endo G protein is not detected, and the disruption abolishes the nuclease activity of endo G. The absence of endo G has no effect on mitochondrial DNA copy number, structure, or mutation rate over the first five generations. There is also no obvious effect on nuclear DNA degradation in standard apoptosis assays. The endo G null mice are viable and show no age-related or generational abnormalities anatomically or histologically. We infer that this highly conserved protein has no mitochondrial or apoptosis function that can discerned by the assays described here and that it may have a function yet to be determined. The early embryonic lethality of endo G null mice recently reported by others may be due to the disruption of the gene that overlaps the endo G gene.

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Crossref · 10.1128/mcb.25.1.294-302.2005

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  • The actual contribution of ENDOG to RCD in mammals has been questioned by generation of Endog−/− mice, whose cells display normal sensitivity to multiple lethal triggers.

    “the actual contribution of ENDOG to RCD in mammals [675] has been questioned by the generation of Endog−/− mice, whose cells display normal sensitivity to multiple lethal triggers [676, 677].”

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Authors
Irvine, R. A., Adachi, N., Shibata, D. K., Cassell, G. D., Yu, K., Karanjawala, Z. E., Hsieh, C.-L., & Lieber, M. R.
Affiliations
  • University of Southern California (US)
  • Departments of Pathology, of Biochemistry & Molecular Biology, of Molecular Microbiology & Immunology, and of Biological Sciences
Corresponding author
Lieber, Michael R.
Venue
Molecular and Cellular Biology
Published
2005-01
Volume
25
Issue
1
Pages
294-302
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2125483893
Cited by
111
References
30
Citations by year
2026: 2 · 2025: 1 · 2024: 3 · 2023: 4 · 2022: 1 · 2021: 4 · 2020: 2 · 2019: 1 · 2018: 2 · 2017: 1 · 2016: 5 · 2015: 3 · 2014: 2 · 2013: 7 · 2012: 6
FWCI
3.67
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of General Medical Sciences (R01GM056984)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
Keywords
endonuclease G, gene knockout, mitochondrial DNA, mitochondrial intermembrane space, nuclease activity, mitochondrial DNA copy number, apoptosis, nuclear DNA degradation, embryonic lethality
MeSH terms
Animals, Cell Nucleus, Cell Survival, Chromatin, DNA, DNA, Mitochondrial, Endodeoxyribonucleases, Enzyme-Linked Immunosorbent Assay, Immunoglobulin G, Immunoglobulin M, Mice, Inbred C57BL, Mice, Mutant Strains, Mice, Transgenic, Mitochondria, Models, Genetic, Mutation, Plasmids, Spleen, Blotting, Southern, Blotting, Western, Apoptosis, Transgenes, Mice, DNA Fragmentation

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