منابع مشابه
Histone variants: deviants?
Histones are a major component of chromatin, the protein-DNA complex fundamental to genome packaging, function, and regulation. A fraction of histones are nonallelic variants that have specific expression, localization, and species-distribution patterns. Here we discuss recent progress in understanding how histone variants lead to changes in chromatin structure and dynamics to carry out specifi...
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Highly variant histones are targeted to specialized chromatin domains, such as the centromere where they have an essential role in the segregation of sister chromatids at mitosis.
متن کاملHistone variants and epigenetics.
Histones package and compact DNA by assembling into nucleosome core particles. Most histones are synthesized at S phase for rapid deposition behind replication forks. In addition, the replacement of histones deposited during S phase by variants that can be deposited independently of replication provide the most fundamental level of chromatin differentiation. Alternative mechanisms for depositin...
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Sex is good for us, but it is a compromise. For the benefit of being able to produce genetically variable offspring, we must pay the cost of passing on only half our genes to each of them. Whilst evolutionary biologists still puzzle over the precise details of why the benefits of sex so frequently seem to outweigh the costs (Neiman, Lively, & Meirmans, ), one major challenge to sexual reproduct...
متن کاملNucleosome dynamics and histone variants.
In eukaryotes, DNA is organized into chromatin, a dynamic structure that enables DNA to be accessed for processes such as transcription, replication and repair. To form, maintain or alter this organization according to cellular needs, histones, the main protein component of chromatin, are deposited, replaced, exchanged and post-translationally modified. Histone variants, which exhibit specializ...
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ژورنال
عنوان ژورنال: Genes & Development
سال: 2005
ISSN: 0890-9369
DOI: 10.1101/gad.1272805