6k8x: Difference between revisions
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New page: '''Unreleased structure''' The entry 6k8x is ON HOLD Authors: Bae, D.W., Jung, Y.E., An, Y.J., Jung, Y.E., Cha, S.S. Description: Crystal structure of a class C beta lactamase [[Catego... |
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The | ==Crystal structure of a class C beta lactamase== | ||
<StructureSection load='6k8x' size='340' side='right'caption='[[6k8x]], [[Resolution|resolution]] 1.59Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[6k8x]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Klebsiella_pneumoniae Klebsiella pneumoniae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6K8X OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6K8X FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.59Å</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=6k8x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6k8x OCA], [https://pdbe.org/6k8x PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6k8x RCSB], [https://www.ebi.ac.uk/pdbsum/6k8x PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6k8x ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/Q9XB24_KLEPN Q9XB24_KLEPN] | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
ACC-1 is a plasmid-encoded class C beta-lactamase identified in clinical isolates of Klebsiella pneumoniae, Proteus mirabilis, Salmonella enterica, and Escherichia coli ACC-1-producing bacteria are susceptible to cefoxitin whereas they are resistant to oxyimino cephalosporins. Here, we depict crystal structures of apo ACC-1, adenylylated ACC-1, and acylated ACC-1 complexed with cefotaxime and cefoxitin. ACC-1 has noteworthy structural alterations in the R2-loop, the Omega- loop, and the Phe119-loop along the active-site rim. The adenylate covalently bonded to the nucleophilic serine reveals a tetrahedral phosphorus mimicking the deacylation transition state. Cefotaxime in ACC-1 has a proper conformation for the substrate-assisted catalysis in that its C4 carboxylate and N5 nitrogen are adequately located to facilitate the deacylation reaction. In contrast, cefoxitin in ACC-1 has a distinct conformation in which those functional groups cannot contribute to catalysis. Furthermore, the orientation of the deacylating water relative to the acyl carbonyl group in ACC-1 is unfavorable for nucleophilic attack. | |||
Structural insights into catalytic relevances of substrates' poses in ACC-1.,Bae DW, Jung YE, An YJ, Na JH, Cha SS Antimicrob Agents Chemother. 2019 Aug 26. pii: AAC.01411-19. doi:, 10.1128/AAC.01411-19. PMID:31451494<ref>PMID:31451494</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
[[Category: | <div class="pdbe-citations 6k8x" style="background-color:#fffaf0;"></div> | ||
[[Category: | |||
[[Category: | ==See Also== | ||
[[Category: | *[[Beta-lactamase 3D structures|Beta-lactamase 3D structures]] | ||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Klebsiella pneumoniae]] | |||
[[Category: Large Structures]] | |||
[[Category: An YJ]] | |||
[[Category: Bae DW]] | |||
[[Category: Cha SS]] | |||
[[Category: Jung YE]] | |||
[[Category: Na JH]] | |||
Latest revision as of 10:28, 22 November 2023
Crystal structure of a class C beta lactamase
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