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Structure of the E. coli nucleoid-associated protein YejK reveals a novel DNA binding clamp

Nucleic Acids Res. 2024-06; 
Maria A Schumacher, Rajiv R Singh, Raul Salinas
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Proteins, Expression, Isolation and Analysis The gene encoding E. coli YejK was purchased from Genscript Corporation and subcloned into pET15b using NdeI and BamHI restriction sites. Get A Quote

摘要

Nucleoid-associated proteins (NAPs) play central roles in bacterial chromosome organization and DNA processes. The Escherichia coli YejK protein is a highly abundant, yet poorly understood NAP. YejK proteins are conserved among Gram-negative bacteria but show no homology to any previously characterized DNA-binding protein. Hence, how YejK binds DNA is unknown. To gain insight into YejK structure and its DNA binding mechanism we performed biochemical and structural analyses on the E. coli YejK protein. Biochemical assays demonstrate that, unlike many NAPs, YejK does not show a preference for AT-rich DNA and binds non-sequence specifically. A crystal structure revealed YejK adopts a novel fold comprised of two do... More

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