7md7 | pdb_00007md7

Crystal structure of the Thermus thermophilus 70S ribosome in complex with triphenylphosphonium analog of chloramphenicol CAM-C4-TPP and protein Y (YfiA) at 2.80A resolution

spinqualitylabelsall models 7md7, resolution 2.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7md7 is a 20 chain structure with sequence from Thermus thermophilus HB8. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.8Å Ligands: 0TD, 2MA, 2MG, 2MU, 4OC, 5MC, 5MU, 7MG, ARG, M2G, MA6, MG, MPD, OMG, PSU, UR3, YXM, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function RL2_THET8 One of the primary rRNA binding proteins. Required for association of the 30S and 50S subunits to form the 70S ribosome, for tRNA binding and peptide bond formation. It has been suggested to have peptidyltransferase activity; this is somewhat controversial (By similarity). Makes several contacts with the 16S rRNA (forming bridge B7b) in the 70S ribosome.[HAMAP-Rule:MF_01320_B] Publication Abstract from PubMed Chloramphenicol (CHL) is a ribosome-targeting antibiotic that binds to the peptidyl transferase center (PTC) of the bacterial ribosome and inhibits peptide bond formation. As an approach for modifying and potentially improving the properties of this inhibitor, we explored ribosome binding and inhibitory properties of a semi-synthetic triphenylphosphonium analog of CHL-CAM-C4-TPP. Our data demonstrate that this compound exhibits a ~5-fold stronger affinity for the bacterial ribosome and higher potency as an in vitro protein synthesis inhibitor compared to CHL. The X-ray crystal structure of the Thermus thermophilus 70S ribosome in complex with CAM-C4-TPP reveals that, while its amphenicol moiety binds at the PTC in a fashion identical to CHL, the C4-TPP tail adopts an extended propeller-like conformation within the ribosome exit tunnel where it establishes multiple hydrophobic Van der Waals interactions with the rRNA. The synthesized compound represents a promising chemical scaffold for further development by medicinal chemists because it simultaneously targets the two key functional centers of the bacterial ribosome-PTC and peptide exit tunnel. Binding and Action of Triphenylphosphonium Analog of Chloramphenicol upon the Bacterial Ribosome.,Chen CW, Pavlova JA, Lukianov DA, Tereshchenkov AG, Makarov GI, Khairullina ZZ, Tashlitsky VN, Paleskava A, Konevega AL, Bogdanov AA, Osterman IA, Sumbatyan NV, Polikanov YS Antibiotics (Basel). 2021 Apr 5;10(4):390. doi: 10.3390/antibiotics10040390. PMID:33916420 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ribosome 3D structures

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