View source for 6ux8


==Structure of monobody 33 MLKL N-terminal domain complex==
<StructureSection load='6ux8' size='340' side='right'caption='[[6ux8]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6ux8]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6UX8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6UX8 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]] 2.5&#8491;</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>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6ux8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ux8 OCA], [https://pdbe.org/6ux8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6ux8 RCSB], [https://www.ebi.ac.uk/pdbsum/6ux8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6ux8 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/MLKL_HUMAN MLKL_HUMAN] Required for the execution of programmed necrosis.<ref>PMID:22265414</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The necroptosis cell death pathway has been implicated in host defense and in the pathology of inflammatory diseases. While phosphorylation of the necroptotic effector pseudokinase Mixed Lineage Kinase Domain-Like (MLKL) by the upstream protein kinase RIPK3 is a hallmark of pathway activation, the precise checkpoints in necroptosis signaling are still unclear. Here we have developed monobodies, synthetic binding proteins, that bind the N-terminal four-helix bundle (4HB) "killer" domain and neighboring first brace helix of human MLKL with nanomolar affinity. When expressed as genetically encoded reagents in cells, these monobodies potently block necroptotic cell death. However, they did not prevent MLKL recruitment to the "necrosome" and phosphorylation by RIPK3, nor the assembly of MLKL into oligomers, but did block MLKL translocation to membranes where activated MLKL normally disrupts membranes to kill cells. An X-ray crystal structure revealed a monobody-binding site centered on the alpha4 helix of the MLKL 4HB domain, which mutational analyses showed was crucial for reconstitution of necroptosis signaling. These data implicate the alpha4 helix of its 4HB domain as a crucial site for recruitment of adaptor proteins that mediate membrane translocation, distinct from known phospholipid binding sites.

Identification of MLKL membrane translocation as a checkpoint in necroptotic cell death using Monobodies.,Petrie EJ, Birkinshaw RW, Koide A, Denbaum E, Hildebrand JM, Garnish SE, Davies KA, Sandow JJ, Samson AL, Gavin X, Fitzgibbon C, Young SN, Hennessy PJ, Smith PPC, Webb AI, Czabotar PE, Koide S, Murphy JM Proc Natl Acad Sci U S A. 2020 Mar 31. pii: 1919960117. doi:, 10.1073/pnas.1919960117. PMID:32234780<ref>PMID:32234780</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6ux8" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Synthetic construct]]
[[Category: Birkinshaw RW]]
[[Category: Murphy JM]]
[[Category: Petrie EJ]]