Regulation of DNA replication in B.subtilis by YabA

描述（由申请方提供）：用于控制革兰氏阳性菌复制起始时间和频率的机制尚不清楚。YabA是B中复制起始的负调节因子。枯草杆菌，并保守在其他革兰氏阳性菌。YabA执行其调节功能的机制尚不清楚。 我发现YabA与染色体复制起点（oriC）相关联，并在复制解旋酶加载后的一个步骤中传递到那里。我提出了一系列的实验，以确定必要的因素（S）协会的YabA与oriC。我还建议实验，以确定亚细胞的位置YabA和它的关联与染色体的变化在复制周期。这些实验应该提供洞察YabA的功能，在复制起始抑制的时间。最后，我提出了几个在体内和体外实验，以确定YabA抑制复制起始的机制。

DESCRIPTION (provided by applicant): The mechanism(s) used to control the timing and frequency of replication initiation in Gram positive bacteria are unknown. YabA is a negative regulator of replication initiation in B. subtilis, and is conserved in other Gram positive bacteria. The mechanism by which YabA carries out its regulatory function is not yet understood. I found that YabA associates with the chromosomal origin of replication (oriC), and is delivered there at a step following the loading of the replicative helicase. I propose a series of experiments to identify the factor(s) necessary for association of YabA with oriC. I also propose experiments to determine if the subcellular location of YabA and its association with the chromosome changes during the replication cycle. These experiments should provide insights into the timing of YabA's function in inhibition of replication initiation. Finally, I propose several in vivo and in vitro experiments to determine the mechanism of inhibition of replication initiation by YabA.