2mc7
Structure of Salmonella MgtRStructure of Salmonella MgtR
Structural highlights
FunctionPublication Abstract from PubMedMgtR, a highly hydrophobic peptide expressed in Salmonella enterica serovar Typhimurium, inhibits growth in macrophages through binding to the membrane protein MgtC that has been identified as essential for replication in macrophages. While the Mycobacterium tuberculosis MgtC is highly homologous to its S. Typhi analogue, there does not appear to be an Mtb homologue for MgtR, raising significant pharmacological interest in this system. Here, solid-state NMR and EPR spectroscopy in lipid bilayer preparations were used to demonstrate the formation of a heterodimer between S. Typhi MgtR and the transmembrane helix 4 of Mtb MgtC. Based on the experimental restraints, a structural model of this heterodimer was developed using computational techniques. The result is that MgtR appears to be ideally situated in the membrane to influence the functionality of MgtC. Binding of MgtR, a Salmonella Transmembrane Regulatory Peptide, to MgtC, a Mycobacterium tuberculosis Virulence Factor: A Structural Study.,Jean-Francois FL, Dai J, Yu L, Myrick A, Rubin E, Fajer PG, Song L, Zhou HX, Cross TA J Mol Biol. 2013 Oct 17. pii: S0022-2836(13)00658-X. doi:, 10.1016/j.jmb.2013.10.014. PMID:24140750[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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