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首页> 外文期刊>Nucleic Acids Research >INTERACTION OF THE ICIA PROTEIN WITH AT-RICH REGIONS IN PLASMID REPLICATION ORIGINS
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INTERACTION OF THE ICIA PROTEIN WITH AT-RICH REGIONS IN PLASMID REPLICATION ORIGINS

机译:ICIA蛋白与质体复制起源中AT富集区的相互作用

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A set of AT-rich repeats is a common motif in prokaryotic replication origins, We have screened for proteins binding to the AT-rich repeat region in plasmids F, R1 and pSC101 using an electrophoretic mobility shift assay with PCR-amplified DNA fragments from the origins. The IciA protein, which is known to bind to the AT-rich repeat region in the Escherichia coli origin of chromosome replication, oriC, was found to bind to the corresponding region from plasmids F (oriS) and R1, but not to pSC101, DNase I footprint analysis showed that IciA interacted with the AT-rich region in both F and R1. When the iciA gene was deleted, the copy number of plasmid F increased somewhat, whereas there was no major effect on the replication of pSC101 and R1, or on the E.coli chromosome.
机译:一组富含AT的重复序列是原核生物复制起点中的常见基序。我们使用电泳迁移率变动分析(PCR扩增的DNA片段),筛选了与质粒F,R1和pSC101中富含AT的重复序列区域结合的蛋白质。起源。发现IciA蛋白与大肠杆菌中染色体复制起点oriC的富含AT的重复区域结合,发现它与质粒F(oriS)和R1的相应区域结合,但不与pSC101 DNase结合。我的足迹分析表明,IciA与F和R1中富含AT的区域相互作用。删除iciA基因后,质粒F的拷贝数有所增加,而对pSC101和R1的复制或大肠杆菌染色体没有重大影响。

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