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6wn9

From Proteopedia

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Current revision (14:45, 6 March 2024) (edit) (undo)
 
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<StructureSection load='6wn9' size='340' side='right'caption='[[6wn9]], [[Resolution|resolution]] 1.55&Aring;' scene=''>
<StructureSection load='6wn9' size='340' side='right'caption='[[6wn9]], [[Resolution|resolution]] 1.55&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[6wn9]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Staphylococcus_aureus_aureus Staphylococcus aureus aureus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6WN9 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6WN9 FirstGlance]. <br>
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<table><tr><td colspan='2'>[[6wn9]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Staphylococcus_aureus Staphylococcus aureus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6WN9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6WN9 FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.55&#8491;</td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[6vjp|6vjp]]</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">E5491_14435 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=46170 Staphylococcus aureus aureus])</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6wn9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6wn9 OCA], [https://pdbe.org/6wn9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6wn9 RCSB], [https://www.ebi.ac.uk/pdbsum/6wn9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6wn9 ProSAT]</span></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6wn9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6wn9 OCA], [http://pdbe.org/6wn9 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6wn9 RCSB], [http://www.ebi.ac.uk/pdbsum/6wn9 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6wn9 ProSAT]</span></td></tr>
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</table>
</table>
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<div style="background-color:#fffaf0;">
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== Function ==
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== Publication Abstract from PubMed ==
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[https://www.uniprot.org/uniprot/OATA_STAA8 OATA_STAA8] Responsible for O-acetylation at the C(6)-hydroxyl group of N-acetylmuramyl residues, forming the corresponding N,6-O-diacetylmuramic acid of the peptidoglycan (PubMed:15661003, PubMed:32350117). O-acetylation of the peptidoglycan is the major determinant for lysozyme resistance (PubMed:15661003).<ref>PMID:15661003</ref> <ref>PMID:32350117</ref>
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Many bacteria possess enzymes that modify the essential cell-wall polymer peptidoglycan by O-acetylation. This modification occurs in numerous Gram-positive pathogens, including methicillin-resistant Staphylococcus aureus a common cause of human infections. O-Acetylation of peptidoglycan protects bacteria from the lytic activity of lysozyme, a mammalian innate immune enzyme, and as such is important for bacterial virulence. The O-acetylating enzyme in Gram-positive bacteria, O-acetyltransferase A (OatA), is a two-domain protein consisting of an N-terminal integral membrane domain and a C-terminal extracytoplasmic domain. Here, we present the X-ray crystal structure at 1.71 A resolution and biochemical characterization of the C-terminal domain of S. aureus OatA. The structure revealed that this OatA domain adopts an SGNH-hydrolase fold and possesses a canonical catalytic triad. Site-specific replacement of active-site amino acids revealed the presence of a water-coordinating aspartate residue that limits esterase activity. This residue, although conserved in staphyloccocal OatA and most other homologs, is not present in the previously characterized streptococcal OatA. These results provide insights into the mechanism of acetyl transfer in the SGNH/GDSL hydrolase family and highlight important evolutionary differences between homologous OatA enzymes. Furthermore, this study enhances our understanding of PG O-acetyltransferases, which could guide the development of novel antibacterial drugs to combat infections with multidrug-resistant bacterial pathogens.
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Structural basis for the O-acetyltransferase function of the extracytoplasmic domain of OatA from Staphylococcus aureus.,Jones CS, Sychantha D, Howell PL, Clarke AJ J Biol Chem. 2020 Apr 29. pii: RA120.013108. doi: 10.1074/jbc.RA120.013108. PMID:32350117<ref>PMID:32350117</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 6wn9" style="background-color:#fffaf0;"></div>
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== References ==
== References ==
<references/>
<references/>
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</StructureSection>
</StructureSection>
[[Category: Large Structures]]
[[Category: Large Structures]]
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[[Category: Staphylococcus aureus aureus]]
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[[Category: Staphylococcus aureus]]
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[[Category: Clarke, A J]]
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[[Category: Clarke AJ]]
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[[Category: Howell, P L]]
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[[Category: Howell PL]]
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[[Category: Jones, C J]]
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[[Category: Jones CJ]]
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[[Category: Sychantha, D]]
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[[Category: Sychantha D]]
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[[Category: O-acetyltransferase]]
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[[Category: Peptidoglycan]]
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[[Category: Sgnh hydrolase]]
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[[Category: Transferase]]
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Current revision

Structure of Staphylococcus aureus peptidoglycan O-acetyltransferase A (OatA) C-terminal catalytic domain, Zn-bound

PDB ID 6wn9

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