View source for 7yyb


==Crystal structure of Mycobacterium abscessus Phosphopantetheine adenylyltransferase in complex with Fragment 15==
<StructureSection load='7yyb' size='340' side='right'caption='[[7yyb]], [[Resolution|resolution]] 1.75&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7yyb]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Mycobacteroides_abscessus Mycobacteroides abscessus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7YYB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7YYB 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]] 1.751&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=QX4:4-hydroxy-6-methyl-2H-1-benzopyran-2-one'>QX4</scene></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=7yyb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7yyb OCA], [https://pdbe.org/7yyb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7yyb RCSB], [https://www.ebi.ac.uk/pdbsum/7yyb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7yyb ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/COAD_MYCA9 COAD_MYCA9] Reversibly transfers an adenylyl group from ATP to 4'-phosphopantetheine, yielding dephospho-CoA (dPCoA) and pyrophosphate.
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== Publication Abstract from PubMed ==
Anti-microbial resistance is a rising global healthcare concern that needs urgent attention as growing number of infections become difficult to treat with the currently available antibiotics. This is particularly true for mycobacterial infections like tuberculosis and leprosy and those with emerging opportunistic pathogens such as Mycobacterium abscessus, where multi-drug resistance leads to increased healthcare cost and mortality. M. abscessus is a highly drug-resistant non-tuberculous mycobacterium which causes life-threatening infections in people with chronic lung conditions such as cystic fibrosis. In this study, we explore M. abscessus phosphopantetheine adenylyl transferase (PPAT), an enzyme involved in the biosynthesis of Coenzyme A, as a target for the development of new antibiotics. We provide structural insights into substrate and feedback inhibitor binding modes of M. abscessus PPAT, thereby setting the basis for further chemical exploration of the enzyme. We then utilize a multi-dimensional fragment screening approach involving biophysical and structural analysis, followed by evaluation of compounds from a previous fragment-based drug discovery campaign against M. tuberculosis PPAT ortholog. This allowed the identification of an early-stage lead molecule exhibiting low micro molar affinity against M. abscessus PPAT (Kd 3.2 +/- 0.8 microM) and potential new ways to design inhibitors against this enzyme. The resulting crystal structures reveal striking conformational changes and closure of solvent channel of M. abscessus PPAT hexamer providing novel strategies of inhibition. The study thus validates the ligandability of M. abscessus PPAT as an antibiotic target and identifies crucial starting points for structure-guided drug discovery against this bacterium.

Structural Characterization of Mycobacterium abscessus Phosphopantetheine Adenylyl Transferase Ligand Interactions: Implications for Fragment-Based Drug Design.,Thomas SE, McCarthy WJ, El Bakali J, Brown KP, Kim SY, Blaszczyk M, Mendes V, Abell C, Floto RA, Coyne AG, Blundell TL Front Mol Biosci. 2022 May 30;9:880432. doi: 10.3389/fmolb.2022.880432., eCollection 2022. PMID:35712348<ref>PMID:35712348</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7yyb" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Mycobacteroides abscessus]]
[[Category: Blundell TL]]
[[Category: Coyne AG]]
[[Category: Thomas SE]]