5igi

Macrolide 2'-phosphotransferase type I - complex with guanosine and azithromycin

spinqualitylabelsall models 5igi, resolution 1.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5igi is a 1 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.2Å Ligands: GMP, IPA, ZIT Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q47396_ECOLX Publication Abstract from PubMed The macrolides are a class of antibiotic, characterized by a large macrocyclic lactone ring that can be inactivated by macrolide phosphotransferase enzymes. We present structures for MPH(2')-I and MPH(2')-II in the apo state, and in complex with GTP analogs and six different macrolides. These represent the first structures from the two main classes of macrolide phosphotransferases. The structures show that the enzymes are related to the aminoglycoside phosphotransferases, but are distinguished from them by the presence of a large interdomain linker that contributes to an expanded antibiotic binding pocket. This pocket is largely hydrophobic, with a negatively charged patch located at a conserved aspartate residue, rationalizing the broad-spectrum resistance conferred by the enzymes. Complementary mutation studies provide insights into factors governing substrate specificity. A comparison with macrolides bound to their natural target, the 50S ribosome, suggests avenues for next-generation antibiotic development. Structural Basis for Kinase-Mediated Macrolide Antibiotic Resistance.,Fong DH, Burk DL, Blanchet J, Yan AY, Berghuis AM Structure. 2017 May 2;25(5):750-761.e5. doi: 10.1016/j.str.2017.03.007. Epub 2017, Apr 13. PMID:28416110 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Phosphotransferase 3D structures

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