Non Homologous End Joining. Homologous Recombination Non Homologous End Joining.

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Non Homologous End Joining
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Transcript of Non Homologous End Joining. Homologous Recombination Non Homologous End Joining.

Page 1: Non Homologous End Joining. Homologous Recombination Non Homologous End Joining.

Non Homologous End Joining

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Homologous Recombination

Non Homologous End Joining

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Differences between HR and NHEJ:

• Error- free / Error- prone• Cell cycle regulated • Varies between species

HR NHEJ

yeast mammalsplants

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HR NHEJ

MHC rearrangementMeiosis

Cell-induced Double Strand Brakes

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V(D)J recombination

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NHEJ Defects

• SCID (Severe Combined Immune Deficiency).

• Cancer – genome instability: rearrangements, deletions, amplifications.

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Ku 70/80 heterodimer

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Ku has a role in telomeres

?

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KU 70/80

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Ku is critical for telomere maintenance

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Ku Plays Several Roles at Telomeres

Telomere addition

Telomeric silencing

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Ku is a multifunctional protein

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HR

NHEJ