CTP regulates membrane-binding activity of the nucleoid occlusion protein Noc
CTP regulates membrane-binding activity of the nucleoid occlusion protein Noc
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CTP 调节类核封闭蛋白 Noc 的膜结合活性
DOI:
10.1101/2021.02.11.430593
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Jalal A
中科院分区:
文献类型:
--
作者:
Jalal A
ATP- and GTP-dependent molecular switches are extensively used to control functions of proteins in a wide range of biological processes. However, CTP switches are rarely reported. Here, we report that a nucleoid occlusion protein Noc is a CTPase enzyme whose membrane-binding activity is directly regulated by a CTP switch. InBacillus subtilis, Noc nucleates on 16 bpNBSsites before associating with neighboring non-specific DNA to form large membrane-associated nucleoprotein complexes to physically occlude assembly of the cell division machinery. Byin vitroreconstitution, we show that (1) CTP is required for Noc to form theNBS-dependent nucleoprotein complex, and (2) CTP binding, but not hydrolysis, switches Noc to a membrane-active state. Overall, we suggest that CTP couples membrane-binding activity of Noc to nucleoprotein complex formation to ensure productive recruitment of DNA to the bacterial cell membrane for nucleoid occlusion activity.
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