View source for 6myj


==Pleurotus ostreatus OstreolysinA plus sphingomyelin==
<StructureSection load='6myj' size='340' side='right'caption='[[6myj]], [[Resolution|resolution]] 1.33&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6myj]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Pleurotus_ostreatus Pleurotus ostreatus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6MYJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6MYJ 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]] 1.33&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=K6V:N-[(2S)-1-hydroxypropan-2-yl]butanamide'>K6V</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</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=6myj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6myj OCA], [https://pdbe.org/6myj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6myj RCSB], [https://www.ebi.ac.uk/pdbsum/6myj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6myj ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/OLYA6_PLEOS OLYA6_PLEOS] Has hemolytic activity against bovine erythrocytes at nanomolar concentrations in vitro. Promotes active pleurotolysin B (PlyB)-dependent permeabilization of membranes rich in cholesterol and sphingomyelin. May play an important role in the initial phase of fungal fruiting.<ref>PMID:12020804</ref> <ref>PMID:23806422</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Sphingomyelin and cholesterol are essential lipids that are enriched in plasma membranes of animal cells, where they interact to regulate membrane properties and many intracellular signaling processes. Despite intense study, the interaction between these lipids in membranes is not well understood. Here, structural and biochemical analyses of ostreolysin A (OlyA), a protein that binds to membranes only when they contain both sphingomyelin and cholesterol, reveal that sphingomyelin adopts two distinct conformations in membranes when cholesterol is present. One conformation, bound by OlyA, is induced by stoichiometric, exothermic interactions with cholesterol, properties that are consistent with sphingomyelin/cholesterol complexes. In its second conformation, sphingomyelin is free from cholesterol and does not bind OlyA. A point mutation abolishes OlyA's ability to discriminate between these two conformations. In cells, levels of sphingomyelin/cholesterol complexes are held constant over a wide range of plasma membrane cholesterol concentrations, enabling precise regulation of the chemical activity of cholesterol.

Molecular Discrimination between Two Conformations of Sphingomyelin in Plasma Membranes.,Endapally S, Frias D, Grzemska M, Gay A, Tomchick DR, Radhakrishnan A Cell. 2019 Jan 25. pii: S0092-8674(18)31656-8. doi: 10.1016/j.cell.2018.12.042. PMID:30712872<ref>PMID:30712872</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6myj" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Pleurotus ostreatus]]
[[Category: Endapally S]]
[[Category: Radhakrishnan A]]
[[Category: Tomchick DR]]