The DNA-dependent protein kinase, DNA-PK: 10 years and no ends in sight - PubMed (original) (raw)
Review
doi: 10.1139/o96-054.
Affiliations
- PMID: 8960356
- DOI: 10.1139/o96-054
Review
The DNA-dependent protein kinase, DNA-PK: 10 years and no ends in sight
S P Lees-Miller. Biochem Cell Biol. 1996.
Abstract
The phenomenon of DNA-dependent protein phosphorylation was first described little over 10 years ago. Since then a DNA-dependent protein kinase, DNA-PK, has been purified from human cells and many of its biochemical properties have been characterized. DNA-PK is composed of a large catalytic subunit, DNA-PKcs, and a DNA-targeting protein, Ku. When assembled on a suitable DNA molecule, the DNA-PK holoenzyme acts as a serine/threonine protein kinase that in vitro phosphorylates many DNA binding and non-binding proteins and transcription factors. Recent genetic studies point strongly to functions in DNA double-strand break repair and V(D)J recombination. In addition, biochemical studies suggest a role in the regulation of transcription. Here we discuss, from a historical perspective, the events leading up to our current understanding of the function of DNA-PK, including recent results from our own studies suggesting the involvement of DNA-PK in apoptosis and in viral infection of human cells.
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