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- W2040849488 abstract "The role of the large amount (more than half of the genome) of noncoding DNA in higher organisms is not well understood. DNA evolved to function in the context of chromatin, and the possibility exists that some of the noncoding DNA serves to influence chromatin structure and function. In this age of genomics and bioinformatics, genomic DNA sequences are being searched for informational content beyond the known genetic code. The discovery that period-10 non-T, A/T, G (VWG) triplets are among the most abundant motifs in human genomic DNA suggests that they may serve some function in higher organisms. In this paper, we provide direct evidence that the regular oscillation of period-10 VWG that occurs in the chicken ovalbumin gene sequence with a dinucleosome-like period facilitates nucleosome array formation. Using a linker histone-dependent in vitro chromatin assembly system that spontaneously aligns nucleosomes into a physiological array, we show that nucleosomes tend to avoid DNA regions with low period-10 VWG counts. This avoidance leads to the formation of an array with a nucleosome repeat equal to half the period value of the oscillation in period-10 VWG, as determined by Fourier analysis. Two different half-period deletions in the wild-type DNA sequence altered the nucleosome array, as predicted computationally. In contrast, a full-period deletion had an insignificant effect on the nucleosome array formed, also consistent with the prediction. An inversion mutation, with no DNA sequences deleted, again altered the nucleosome array formed, as predicted computationally. Hence, a VWG dinucleosome signal is plausible." @default.
- W2040849488 created "2016-06-24" @default.
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- W2040849488 date "2004-06-01" @default.
- W2040849488 modified "2023-09-25" @default.
- W2040849488 title "DNA Sequence Alterations Affect Nucleosome Array Formation of the Chicken Ovalbumin Gene†" @default.
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- W2040849488 doi "https://doi.org/10.1021/bi049717f" @default.
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