A Ku Bridge over Broken DNA
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Most DNA double-strand breaks (DSBs) in S- and G2-phase cells are repaired accurately by Rad51-dependent sister chromatid recombination. However, a minority give rise to gross chromosome rearrangements (GCRs), which can result in disease/death. What determines whether a DSB is re
Bacterial histone-like DNA-binding proteins are best known for their role in compacting the genomic DNA. Of these proteins, HU is ubiquitous and highly conserved across the eubacterial kingdom. Using the HBsu (Bacillus subtilis-encoded HU homologue) as a model, we explore here th
The resection of broken DNA ends is required for DNA double-strand break (DSB) repair by homologous recombination (HR) but can inhibit normal repair by nonhomologous end joining (NHEJ), the main DSB repair pathway in G1-phase cells. Antigen receptor gene assembly proceeds through
We investigate the formation process of nonlinear vibrational modes representing broad H-bridge multi–site breathers in DNA. Within a network model of the DNA double helix we take individual motions of the bases within the base pair plane into account. The resulting H-bridge defo