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100 1 _ |a Wiedemann, C.
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245 _ _ |a Legionella pneumophila macrophage infectivity potentiator protein appendage domains modulate protein dynamics and inhibitor binding
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520 _ _ |a Macrophage infectivity potentiator (MIP) proteins are widespread in human pathogens including Legionella pneumophila, the causative agent of Legionnaires' disease and protozoans such as Trypanosoma cruzi. All MIP proteins contain a FKBP (FK506 binding protein)-like prolyl-cis/trans-isomerase domain that hence presents an attractive drug target. Some MIPs such as the Legionella pneumophila protein (LpMIP) have additional appendage domains of mostly unknown function. In full-length, homodimeric LpMIP, the N-terminal dimerization domain is linked to the FKBP-like domain via a long, free-standing stalk helix. Combining X-ray crystallography, NMR and EPR spectroscopy and SAXS, we elucidated the importance of the stalk helix for protein dynamics and inhibitor binding to the FKBP-like domain and bidirectional crosstalk between the different protein regions. The first comparison of a microbial MIP and a human FKBP in complex with the same synthetic inhibitor was made possible by high-resolution structures of LpMIP with a [4.3.1]-aza-bicyclic sulfonamide and provides a basis for designing pathogen-selective inhibitors. Through stereospecific methylation, the affinity of inhibitors to L. pneumophila and T. cruzi MIP was greatly improved. The resulting X-ray inhibitor-complex structures of LpMIP and TcMIP at 1.49 and 1.34 Å, respectively, provide a starting point for developing potent inhibitors against MIPs from multiple pathogenic microorganisms.
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700 1 _ |a Whittaker, J. J.
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700 1 _ |a Pérez Carrillo, V. H.
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700 1 _ |a Goretzki, B.
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700 1 _ |a Dajka, M.
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700 1 _ |a Tebbe, F.
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700 1 _ |a Harder, J.-M.
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700 1 _ |a Krajczy, P. R.
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700 1 _ |a Joseph, B.
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700 1 _ |a Hausch, F.
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700 1 _ |a Guskov, A.
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700 1 _ |a Hellmich, Ute
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773 _ _ |a 10.1016/j.ijbiomac.2023.126366
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