View source for 6bmt


==Crystal Structure of a Recombinant form of Human Myeloperoxidase Bound to an Inhibitor from Staphylococcus delphini==
<StructureSection load='6bmt' size='340' side='right'caption='[[6bmt]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6bmt]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Staphylococcus_delphini Staphylococcus delphini]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6BMT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6BMT 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]] 2.403&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</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=6bmt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6bmt OCA], [https://pdbe.org/6bmt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6bmt RCSB], [https://www.ebi.ac.uk/pdbsum/6bmt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6bmt ProSAT]</span></td></tr>
</table>
== Disease ==
[https://www.uniprot.org/uniprot/PERM_HUMAN PERM_HUMAN] Defects in MPO are the cause of myeloperoxidase deficiency (MPOD) [MIM:[https://omim.org/entry/254600 254600]. A disorder characterized by decreased myeloperoxidase activity in neutrophils and monocytes that results in disseminated candidiasis.<ref>PMID:8142659</ref> <ref>PMID:7904599</ref> <ref>PMID:8621627</ref> <ref>PMID:9637725</ref> <ref>PMID:9354683</ref> 
== Function ==
[https://www.uniprot.org/uniprot/PERM_HUMAN PERM_HUMAN] Part of the host defense system of polymorphonuclear leukocytes. It is responsible for microbicidal activity against a wide range of organisms. In the stimulated PMN, MPO catalyzes the production of hypohalous acids, primarily hypochlorous acid in physiologic situations, and other toxic intermediates that greatly enhance PMN microbicidal activity.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Staphylococcus aureus and related species are highly adapted to their hosts and have evolved numerous strategies to evade the immune system. S. aureus shows resistance to killing following uptake into the phagosome, which suggests that the bacterium evades intracellular killing mechanisms used by neutrophils. We recently discovered an S. aureus protein (SPIN for Staphylococcal Peroxidase INhibitor) that binds to and inhibits myeloperoxidase (MPO), a major player in the oxidative defense of neutrophils. To allow for comparative studies between multiple SPIN sequences, we identified a panel of homologs from species closely related to S. aureus. Characterization of these proteins revealed that SPIN molecules from S. agnetis, S. delphini, S. schleiferi, and S. intermedius all bind human MPO with nanomolar affinities, and that those from S. delphini, S. schleiferi, and S. intermedius inhibit human MPO in a dose-dependent manner. A 2.4A resolution co-crystal structure of SPIN-delphini bound to recombinant human MPO allowed us to identify conserved structural features of SPIN proteins, and to propose sequence-dependent physical explanations for why SPIN-aureus binds human MPO with higher affinity than SPIN-delphini. Together, these studies expand our understanding of MPO binding and inhibition by a recently identified component of the staphylococcal innate immune evasion arsenal.

Identification and structural characterization of a novel myeloperoxidase inhibitor from Staphylococcus delphini.,Ploscariu NT, de Jong NWM, van Kessel KPM, van Strijp JAG, Geisbrecht BV Arch Biochem Biophys. 2018 Mar 7;645:1-11. doi: 10.1016/j.abb.2018.03.007. PMID:29524428<ref>PMID:29524428</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6bmt" style="background-color:#fffaf0;"></div>

==See Also==
*[[Myeloperoxidase|Myeloperoxidase]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Staphylococcus delphini]]
[[Category: Geisbrecht BV]]
[[Category: Ploscariu NT]]