西亚试剂：Chemical genomics in Escherichia coli identifies an inhibit

Chemical genomics in Escherichia coli identifies an inhibitor of bacterial lipoprotein targeting

Ranjana Pathania1,2,4, Soumaya Zlitni1,2, Courtney Barker1,2, Rahul Das3, David A Gerritsma2,3, Julie Lebert2,3, Emilia Awuah2,3, Giuseppe Melacini1,3, Fred A Capretta2,3 & Eric D Brown1,2

One of the most significant hurdles to developing new chemical probes of biological systems and new drugs to treat disease is that of understanding the mechanism of action of small molecules discovered with cell-based small-molecule screening. Here we have assembled an ordered, high-expression clone set of all of the essential genes from Escherichia coli and used it to systematically screen for suppressors of growth inhibitory compounds. Using this chemical genomic approach, we demonstrate that the targets of well-known antibiotics can be identified as high copy suppressors of chemical lethality. This approach led to the discovery of MAC13243, a molecule that belongs to a new chemical class and that has a unique mechanism and promising activity against multidrug-resistant Pseudomonas aeruginosa. We show that MAC13243 inhibits the function of the LolA protein and represents a new chemical probe of lipoprotein targeting in bacteria with promise as an antibacterial lead with Gram-negative selectivity.
 
1 Department of Biochemistry and Biomedical Sciences.
Michael G. DeGroote Institute of Infectious Disease Research.
2 Department of Chemistry, McMaster University, Hamilton, Ontario, Canada.
3 Present address: Department of Biotechnology, Indian Institute of Technology, Roorkee Uttaranchal, India.

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