Assembly of Nucleosomal Arrays from Recombinant Core Histones and Nucleosome Positioning DNA
نویسندگان
چکیده
منابع مشابه
Reconstitution of nucleosome core particles from recombinant histones and DNA.
The ability to prepare nucleosome core particles (NCPs), or nucleosomal arrays, from recombinant histone proteins and defined-sequence DNA has become a requirement in many projects that address the role of histone modifications, histone variants, or histone mutations in nucleosome and chromatin structure. This approach offers many advantages, such as the ability to combine histone variants and ...
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Eukaryotic chromosomal DNA is assembled into regularly spaced nucleosomes, which play a central role in gene regulation by determining accessibility of control regions. The nucleosome contains ∼147 bp of DNA wrapped ∼1.7 times around a central core histone octamer. The linker histone, H1, binds both to the nucleosome, sealing the DNA coils, and to the linker DNA between nucleosomes, directing c...
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Gene expression in eukaryotes depends upon positioning, mobility and packaging of nucleosomes; thus, we need the detailed information of the human nucleosome core particle (NCP) structure, which could clarify chromatin properties. Here, we report the 2.5 A crystal structure of a human NCP. The overall structure is similar to those of other NCPs reported previously. However, the DNA path of huma...
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Electron spin resonance study of Mn (II) binding to chromatin and derivatives, including core particles, shows that Mn (II) is a good probe for testing the overall electrostatic balance of the nucleoproteic complex as well as DNA accessibility. Experimental results are in good agreement with a recent model proposed (Mirzabekov A. D. and Rich A. (1979) Proc. Natl. Acad. Sci. USA 76, 1118-1121), ...
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The genome of a human cell comprises 6 10 DNA base pairs corresponding to a DNA chain with a total contour length of about 2m. Free in solution, a DNAduplex of this length would occupy the volume of a sphere with a diameter of approximately 400 mm as estimated from its calculated radius of gyration. This amount of DNA is packaged into a nucleus with a typical diameter of 10 to 20 mm. The requir...
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ژورنال
عنوان ژورنال: Journal of Visualized Experiments
سال: 2013
ISSN: 1940-087X
DOI: 10.3791/50354