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The role of DNA‐PK in aging and energy metabolism.
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- Author(s): Chung, Jay H.
- Source:
FEBS Journal; Jun2018, Vol. 285 Issue 11, p1959-1972, 14p- Subject Terms:
- Source:
- Additional Information
- Abstract: DNA‐dependent protein kinase (DNA‐PK) is a very large holoenzyme comprised of the p470 kDa DNA‐PK catalytic subunit (DNA‐PK
cs ) and the Ku heterodimer consisting of the p86 (Ku 80) and p70 (Ku 70) subunits. It is best known for its nonhomologous end joining (NHEJ) activity, which repairs double‐strand DNA (dsDNA) breaks (DSBs). As expected, the absence of DNA‐PK activity results in sensitivity to ionizing radiation, which generates DSBs and defect in lymphocyte development, which requires NHEJ of the V(D)J region in the immunoglobulin and T‐cell receptor loci. DNA‐PK also has been reported to have functions seemingly unrelated to NHEJ. For example, DNA‐PK responds to insulin signaling to facilitate the conversion of carbohydrates to fatty acids in the liver. More recent evidence indicates that DNA‐PK activity increases with age in skeletal muscle, promoting mitochondrial loss and weight gain. These discoveries suggest that our understanding of DNA‐PK is far from complete. As many excellent reviews have already been written about the role of DNA‐PK in NHEJ, here we will review the non‐NHEJ role of DNA‐PK with a focus on its role in aging and energy metabolism. [ABSTRACT FROM AUTHOR] - Abstract: Copyright of FEBS Journal is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Abstract:
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