Abstract
Hexasomes are non-canonical nucleosomes that package DNA with six instead of eight histones. First discovered 40 years ago as a consequence of transcription, two near-atomic-resolution cryo-EM structures of the hexasome in complex with the chromatin remodeler INO80 have now started to unravel its mechanistic impact on the regulatory landscape of chromatin. Loss of one histone H2A-H2B dimer converts inactive nucleosomes into distinct and favorable substrates for ATP-dependent chromatin remodeling.
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