Cited by 429Cell death mechanisms and regulationMitochondrial Function and PathologyProtein Kinase Regulation and GTPase Signaling

Translocation of SAPK/JNK to Mitochondria and Interaction with Bcl-xL in Response to DNA Damage

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Kharbanda, Surender, Saxena, Satya, Yoshida, Kiyotsugu, Pandey, Pramod, Kaneki, Masao, Wang, Qizhi, Cheng, Keding, Chen, Ying-Nan +7 more·2000·Journal of Biological Chemistry

Abstract

Activation of the stress-activated protein kinase (SAPK/JNK) by genotoxic agents is necessary for induction of apoptosis. We report here that ionizing radiation ionizing radiation exposure induces translocation of SAPK to mitochondria and association of SAPK with the anti-apoptotic Bcl-x(L) protein. SAPK phosphorylates Bcl-x(L) on threonine 47 (Thr-47) and threonine 115 (Thr-115) in vitro and in vivo. In contrast to wild-type Bcl-x(L), a mutant Bcl-x(L) with the two threonines substituted by alanines (Ala-47, Ala-115) is a more potent inhibitor of ionizing radiation-induced apoptosis. These findings indicate that translocation of SAPK to mitochondria is functionally important for interactions with Bcl-x(L) in the apoptotic response to genotoxic stress.

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Crossref · 10.1074/jbc.275.1.322

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Authors
Kharbanda, S., Saxena, S., Yoshida, K., Pandey, P., Kaneki, M., Wang, Q., Cheng, K., Chen, Y.-N., Campbell, A., Sudha, T., Yuan, Z.-M., Narula, J., Weichselbaum, R., Nalin, C., & Kufe, D.
Affiliations
  • Harvard University (US)
  • University of Manitoba (CA)
  • Novartis (United States) (US)
  • University of Chicago (US)
Corresponding author
  • Kharbanda, Surender
  • Saxena, Satya
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2000-01
Volume
275
Issue
1
Pages
322-327
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2148061274
Cited by
429
References
56
Citations by year
2026: 3 · 2025: 6 · 2024: 3 · 2023: 1 · 2022: 4 · 2021: 8 · 2020: 8 · 2019: 8 · 2018: 8 · 2017: 8 · 2016: 11 · 2015: 12 · 2014: 16 · 2013: 11 · 2012: 17
FWCI
14.95
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (1r01ca075216-01)
  • National Cancer Institute (CA 55421, CA 75216)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
SAPK/JNK, c-Jun N-terminal kinase, mitochondrial translocation, Bcl-xL, ionizing radiation, DNA damage, apoptosis, genotoxic stress, protein phosphorylation, anti-apoptotic proteins
MeSH terms
Biological Transport, Cell Compartmentation, DNA Damage, Humans, Mitochondria, Phosphorylation, Radiation, Ionizing, Recombinant Proteins, Mutagenesis, Apoptosis, Proto-Oncogene Proteins c-bcl-2, U937 Cells, Mitogen-Activated Protein Kinases, bcl-X Protein

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