arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0710.4030q-bio.GN
收藏

从DNA序列分析到人类基因组复制建模

From DNA sequence analysis to modeling replication in the human genome

Edward-Benedict Brodie, Samuel Nicolay, Marie Touchon, Benjamin Audit, Yves D'Aubenton-Carafa, Claude Thermes, Alain Arneodo

摘要:

我们探讨了大规模的行为,核苷酸组成链不对称沿人类染色体。正如我们观察到的,到目前为止,实验确定的9个复制起点中有7个,(TA+GC)偏斜显示出相当尖锐的向上跳跃,在两个连续的跳跃之间具有线性下降的曲线。我们提出了一个模型,复制定位良好的复制起点和随机终止,占所观察到的特征锯齿状的偏斜配置文件。我们成功地确定了287对假定的相邻复制起点,起点间距约1-2 Mbp,这可能对应于在间期核中观察到的复制灶,并被认为是在随后的细胞世代中持续存在的稳定结构。

英文摘要:

We explore the large-scale behavior of nucleotide compositional strand asymmetries along human chromosomes. As we observe for 7 of 9 origins of replication experimentally identified so far, the (TA+GC) skew displays rather sharp upward jumps, with a linear decreasing profile in between two successive jumps. We present a model of replication with well positioned replication origins and random terminations that accounts for the observed characteristic serrated skew profiles. We succeed in identifying 287 pairs of putative adjacent replication origins with an origin spacing approximately 1-2 Mbp that are likely to correspond to replication foci observed in interphase nuclei and recognized as stable structures that persist throughout subsequent cell generations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑