View source for 7nai


==Crystal structure of the TIR domain from human SARM1 in complex with 3AD==
<StructureSection load='7nai' size='340' side='right'caption='[[7nai]], [[Resolution|resolution]] 1.74&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7nai]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7NAI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7NAI 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]] 1.74&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=1O4:[[(2~{R},3~{S},4~{R},5~{R})-5-(6-aminopurin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl]+[(2~{R},3~{S},4~{R},5~{R})-5-(8-azanylisoquinolin-2-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methyl+hydrogen+phosphate'>1O4</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=7nai FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7nai OCA], [https://pdbe.org/7nai PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7nai RCSB], [https://www.ebi.ac.uk/pdbsum/7nai PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7nai ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/SARM1_HUMAN SARM1_HUMAN] Negative regulator of MYD88- and TRIF-dependent toll-like receptor signaling pathway which plays a pivotal role in activating axonal degeneration following injury. Promotes Wallerian degeneration an injury-induced axonal death pathway which involves degeneration of an axon distal to the injury site. Can activate neuronal death in response to stress. Regulates dendritic arborization through the MAPK4-JNK pathway. Involved in innate immune response. Inhibits both TICAM1/TRIF- and MYD88-dependent activation of JUN/AP-1, TRIF-dependent activation of NF-kappa-B and IRF3, and the phosphorylation of MAPK14/p38.<ref>PMID:15123841</ref> <ref>PMID:16964262</ref> <ref>PMID:16985498</ref> <ref>PMID:20306472</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The NADase SARM1 (sterile alpha and TIR motif containing 1) is a key executioner of axon degeneration and a therapeutic target for several neurodegenerative conditions. We show that a potent SARM1 inhibitor undergoes base exchange with the nicotinamide moiety of nicotinamide adenine dinucleotide (NAD(+)) to produce the bona fide inhibitor 1AD. We report structures of SARM1 in complex with 1AD, NAD(+) mimetics and the allosteric activator nicotinamide mononucleotide (NMN). NMN binding triggers reorientation of the armadillo repeat (ARM) domains, which disrupts ARM:TIR interactions and leads to formation of a two-stranded TIR domain assembly. The active site spans two molecules in these assemblies, explaining the requirement of TIR domain self-association for NADase activity and axon degeneration. Our results reveal the mechanisms of SARM1 activation and substrate binding, providing rational avenues for the design of new therapeutics targeting SARM1.

Structural basis of SARM1 activation, substrate recognition, and inhibition by small molecules.,Shi Y, Kerry PS, Nanson JD, Bosanac T, Sasaki Y, Krauss R, Saikot FK, Adams SE, Mosaiab T, Masic V, Mao X, Rose F, Vasquez E, Furrer M, Cunnea K, Brearley A, Gu W, Luo Z, Brillault L, Landsberg MJ, Di Antonio A, Kobe B, Milbrandt J, Hughes RO, Ve T Mol Cell. 2022 Mar 18. pii: S1097-2765(22)00216-7. doi:, 10.1016/j.molcel.2022.03.007. PMID:35334231<ref>PMID:35334231</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7nai" style="background-color:#fffaf0;"></div>

==See Also==
*[[SARM1 3D structures|SARM1 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Shi Y]]
[[Category: Ve T]]