Chromatin structure of the potential Z-forming sequence (dT-dG)n X (dC-dA)n. Evidence for an "alternating-B" conformation.
Chromatin structure of the potential Z-forming sequence (dT-dG)n X (dC-dA)n. Evidence for an "alternating-B" conformation.
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潜在 Z 形成序列 (dT-dG)n X (dC-dA)n 的染色质结构。
DOI:
10.1016/0022-2836(85)90218-9
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发表时间:
1985
影响因子:
5.6
通讯作者:
Garrard,WT
中科院分区:
文献类型:
--
作者:
Gross,DS;Huang,SY;Garrard,WT
The sequence (dT-dG)n· (dC-dA)nis the most abundant purine-pyrimidine dinucleotide repeat in eukaryotic genomes. This sequence and certain others that contain alternating purine-pyrimidine residues have been shown to adopt the left-handed,Z-DNA conformationin vitrowhen subjected to negative torsional stress or elevated ionic strengths. We have asked whether (dT-dG)n· (dC-dA)ntracts exist in topologically constrainedZ-form structuresin vivoby examining the chromatin organization of these sequences in cultured mouse cell nuclei. We find that these elements are quantitatively packaged into typical core particles which are embedded in canonical polynucleosomal arrays. In addition, these sequences neither flank nor reside within regions of chromatin that are preferentially sensitive to S1nuclease. These characteristics suggest that these tracts do not exist predominantly in theZ-formin vivo. Furthermore, employing techniques that permit prominent hybridization to DNA fragments as short as 18 bases, we provide evidence thatin vivo, most (dT-dG)n· (dC-dA)nelements instead adopt an “alternating-B” conformation on the nucleosomal surface.
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影响因子:
5.6
作者:
LOMONOSSOFF, GP;BUTLER, PJG;KLUG, A
通讯作者:
KLUG, A
影响因子:
--
作者:
R. Laskey
通讯作者:
R. Laskey
影响因子:
14.9
作者:
L. Lutter
通讯作者:
L. Lutter
DOI:
10.1016/0006-291x(83)91499-7
发表时间:
1983-04
影响因子:
3.1
作者:
P. Cockerill;G. Goodwin
通讯作者:
P. Cockerill;G. Goodwin
影响因子:
64.8
作者:
Walmsley,RM;Szostak,JW;Petes,TD
通讯作者:
Petes,TD