Enrichment of Non-B-Form DNA at D. melanogaster Centromeres.

Enrichment of Non-B-Form DNA at D. melanogaster Centromeres.
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D. melanogaster着丝粒非b型DNA的富集。

DOI:
10.1093/gbe/evac054
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发表时间:
2022-05-03
影响因子:
3.3
通讯作者:
Mellone, Barbara G.
Mellone, Barbara G.
中科院分区:
生物学2区
文献类型:
--
作者:
Patchigolla, Venkata S. P.;Mellone, Barbara G.

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着丝粒是在真核细胞分裂过程中介导遗传信息准确遗传的重要染色体区域。尽管其功能保守,但着丝粒不包含保守的 DNA 序列,而是通过着丝粒特异性组蛋白 H3 变体着丝粒蛋白 A 的存在进行表观遗传学标记。着丝粒 DNA 序列对着丝粒身份的功能贡献仍然难以捉摸。先前的研究发现,具有采用非规范二级 DNA 结构倾向的二元对称性在几个物种的着丝粒处丰富。这些发现提出了非规范 DNA 结构可能有助于着丝粒规范的提议。在这里,我们分析了最近鉴定的果蝇着丝粒 DNA 序列的预测二级结构。尽管二分体对称性仅在 Y 着丝粒上富集,但我们发现其他类型的非规范 DNA 结构,包括熔化 DNA 和 G-四链体,是所有黑腹果蝇着丝粒的共同特征。我们的工作与之前的模型一致,表明非规范 DNA 二级结构可能是着丝粒的保守特征,可能对着丝粒规范产生影响。
Centromeres are essential chromosomal regions that mediate the accurate inheritance of genetic information during eukaryotic cell division. Despite their conserved function, centromeres do not contain conserved DNA sequences and are instead epigenetically marked by the presence of the centromere-specific histone H3 variant centromeric protein A. The functional contribution of centromeric DNA sequences to centromere identity remains elusive. Previous work found that dyad symmetries with a propensity to adopt noncanonical secondary DNA structures are enriched at the centromeres of several species. These findings lead to the proposal that noncanonical DNA structures may contribute to centromere specification. Here, we analyze the predicted secondary structures of the recently identified centromere DNA sequences of Drosophila melanogaster. Although dyad symmetries are only enriched on the Y centromere, we find that other types of noncanonical DNA structures, including melted DNA and G-quadruplexes, are common features of all D. melanogaster centromeres. Our work is consistent with previous models suggesting that noncanonical DNA secondary structures may be conserved features of centromeres with possible implications for centromere specification.
DOI: 10.1126/science.aan6490
发表时间: 2018-01-05
期刊: Science (New York, N.Y.)
影响因子: --
作者:
Kabeche L;Nguyen HD;Buisson R;Zou L
通讯作者: Zou L
DOI: 10.1083/jcb.201305036
发表时间: 2014-02-03
期刊: The Journal of cell biology
影响因子: --
作者:
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通讯作者: Mellone BG
DOI: 10.1093/molbev/msy010
发表时间: 2018-04-01
影响因子: 10.7
作者:
Kasinathan S;Henikoff S
通讯作者: Henikoff S
DOI: 10.1534/genetics.118.301765
发表时间: 2019-01-01
期刊: GENETICS
影响因子: 3.3
作者:
Chang, Ching-Ho;Larracuente, Amanda M.
通讯作者: Larracuente, Amanda M.
DOI: 10.1038/sdata.2014.45
发表时间: 2014
期刊: SCIENTIFIC DATA
影响因子: 9.8
作者:
Kim, Kristi E.;Peluso, Paul;Babayan, Primo;Yeadon, P. Jane;Yu, Charles;Fisher, William W.;Chin, Chen-Shan;Rapicavoli, Nicole A.;Rank, David R.;Li, Joachim;Catcheside, David E. A.;Celniker, Susan E.;Phillippy, Adam M.;Bergman, Casey M.;Landolin, Jane M.
通讯作者: Landolin, Jane M.