Journal
CURRENT OPINION IN STRUCTURAL BIOLOGY
Volume 55, Issue -, Pages 154-160Publisher
CURRENT BIOLOGY LTD
DOI: 10.1016/j.sbi.2019.03.026
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Funding
- Wellcome Trust [093167/Z/10/Z, 200814/Z/1_6/Z]
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Non-homologous end joining (NHEJ), a process for repair of DNA-breaks that does not require a DNA-template, involves synapsis, end-processing and ligation. Synapsis is initiated by assembly of the Ku-heterodimer on DNA broken ends, followed by the formation of DNA-dependent protein kinase (DNA-PK) - an assembly of the catalytic subunit (DNA-PKcs), the Ku-heterodimer and DNA. Recent progress in understanding the structural architecture of DNA-PK, achieved by X-ray crystallography and cryo-electron microscopy, has revealed a stage of DNA-PKcs on which other components from the pathway assemble and mediate kinase activity allosterically. This review provides a comparative overview of recently published structures of DNA-PK, together with a discussion of other complexes mediated by the Ku-heterodimer. It also shows that some binders are specific to particular patho-physiological conditions.
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