2vbq: Difference between revisions
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< | ==Structure of AAC(6')-Iy in complex with bisubstrate analog CoA-S- monomethyl-acetylneamine.== | ||
<StructureSection load='2vbq' size='340' side='right'caption='[[2vbq]], [[Resolution|resolution]] 2.00Å' scene=''> | |||
You may | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2vbq]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2VBQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2VBQ FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BSJ:(3R,9Z)-17-[(2R,3S,4R,5R,6R)-5-AMINO-6-{[(1R,2R,3S,4R,6S)-4,6-DIAMINO-2,3-DIHYDROXYCYCLOHEXYL]OXY}-3,4-DIHYDROXYTETRAHYDRO-2H-PYRAN-2-YL]-3-HYDROXY-2,2-DIMETHYL-4,8,15-TRIOXO-12-THIA-5,9,16-TRIAZAHEPTADEC-9-EN-1-YL+[(2R,3S,4R,5R)-5-(6-AMINO-9H-PURIN-9-YL)-4-HYDROXY-3-(PHOSPHONOOXY)TETRAHYDROFURAN-2-YL]METHYL+DIHYDROGEN+DIPHOSPHATE'>BSJ</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NI:NICKEL+(II)+ION'>NI</scene></td></tr> | |||
- | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1s3z|1s3z]], [[1s5k|1s5k]], [[1s60|1s60]]</div></td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Aminoglycoside_N(6')-acetyltransferase Aminoglycoside N(6')-acetyltransferase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.1.82 2.3.1.82] </span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2vbq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2vbq OCA], [https://pdbe.org/2vbq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2vbq RCSB], [https://www.ebi.ac.uk/pdbsum/2vbq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2vbq ProSAT]</span></td></tr> | |||
</table> | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/vb/2vbq_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</jmolCheckbox> | |||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2vbq ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Aminoglycosides are antibacterial compounds that act by binding to the A site of the small 30S bacterial ribosomal subunit and inhibiting protein translation. Clinical resistance to aminoglycosides is generally the result of the expression of enzymes that covalently modify the antibiotic, including phosphorylation, adenylylation, and acetylation. Bisubstrate analogs for the aminoglycoside N-acetyltransferases are nanomolar inhibitors of Enterococcus faecium AAC(6')-Ii. However, in the case of the Salmonella enterica aac(6')-Iy-encoded aminoglycoside N-acetyltransferase, we demonstrate that a series of bisubstrate analogs are only micromolar inhibitors. In contrast to studies with AAC(6')-Ii, the inhibition constants toward AAC(6')-Iy are essentially independent of both the identity of the aminoglycoside component of the bisubstrate and the number of carbon atoms that are used to link the CoA and aminoglycoside components. The patterns of inhibition suggest that the CoA portion of the bisubstrate analog can bind to the enzyme-aminoglycoside substrate complex and that the aminoglycoside portion can bind to the enzyme-CoA product complex. However, at the high concentrations of bisubstrate analog used in crystallization experiments, we could crystallize and solve the three-dimensional structure of the enzyme-bisubstrate complex. The structure reveals that both the CoA and aminoglycoside portions bind in essentially the same positions as those previously observed for the enzyme-CoA-ribostamycin complex, with only a modest adjustment to accommodate the "linker". These results are compared to previous studies of the interaction of similar bisubstrate analogs with other aminoglycoside N-acetyltransferases. | |||
Kinetic and structural analysis of bisubstrate inhibition of the Salmonella enterica aminoglycoside 6'-N-acetyltransferase.,Magalhaes ML, Vetting MW, Gao F, Freiburger L, Auclair K, Blanchard JS Biochemistry. 2008 Jan 15;47(2):579-84. Epub 2007 Dec 21. PMID:18095712<ref>PMID:18095712</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2vbq" style="background-color:#fffaf0;"></div> | |||
[[Category: | == References == | ||
[[Category: Auclair, K | <references/> | ||
[[Category: Blanchard, J S | __TOC__ | ||
[[Category: Freiburger, L | </StructureSection> | ||
[[Category: Gao, F | [[Category: Large Structures]] | ||
[[Category: Magalhaes, M L | [[Category: Auclair, K]] | ||
[[Category: Vetting, M W | [[Category: Blanchard, J S]] | ||
[[Category: Freiburger, L]] | |||
[[Category: Gao, F]] | |||
[[Category: Magalhaes, M L]] | |||
[[Category: Vetting, M W]] | |||
[[Category: Acetyltransferase]] | [[Category: Acetyltransferase]] | ||
[[Category: Aminoglycoside]] | [[Category: Aminoglycoside]] | ||
| Line 27: | Line 44: | ||
[[Category: Drug resistance]] | [[Category: Drug resistance]] | ||
[[Category: Transferase]] | [[Category: Transferase]] | ||
Latest revision as of 20:28, 15 December 2021
Structure of AAC(6')-Iy in complex with bisubstrate analog CoA-S- monomethyl-acetylneamine.Structure of AAC(6')-Iy in complex with bisubstrate analog CoA-S- monomethyl-acetylneamine.
Structural highlights
Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedAminoglycosides are antibacterial compounds that act by binding to the A site of the small 30S bacterial ribosomal subunit and inhibiting protein translation. Clinical resistance to aminoglycosides is generally the result of the expression of enzymes that covalently modify the antibiotic, including phosphorylation, adenylylation, and acetylation. Bisubstrate analogs for the aminoglycoside N-acetyltransferases are nanomolar inhibitors of Enterococcus faecium AAC(6')-Ii. However, in the case of the Salmonella enterica aac(6')-Iy-encoded aminoglycoside N-acetyltransferase, we demonstrate that a series of bisubstrate analogs are only micromolar inhibitors. In contrast to studies with AAC(6')-Ii, the inhibition constants toward AAC(6')-Iy are essentially independent of both the identity of the aminoglycoside component of the bisubstrate and the number of carbon atoms that are used to link the CoA and aminoglycoside components. The patterns of inhibition suggest that the CoA portion of the bisubstrate analog can bind to the enzyme-aminoglycoside substrate complex and that the aminoglycoside portion can bind to the enzyme-CoA product complex. However, at the high concentrations of bisubstrate analog used in crystallization experiments, we could crystallize and solve the three-dimensional structure of the enzyme-bisubstrate complex. The structure reveals that both the CoA and aminoglycoside portions bind in essentially the same positions as those previously observed for the enzyme-CoA-ribostamycin complex, with only a modest adjustment to accommodate the "linker". These results are compared to previous studies of the interaction of similar bisubstrate analogs with other aminoglycoside N-acetyltransferases. Kinetic and structural analysis of bisubstrate inhibition of the Salmonella enterica aminoglycoside 6'-N-acetyltransferase.,Magalhaes ML, Vetting MW, Gao F, Freiburger L, Auclair K, Blanchard JS Biochemistry. 2008 Jan 15;47(2):579-84. Epub 2007 Dec 21. PMID:18095712[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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