View source for 4trg


==the SNL domain of SidC==
<StructureSection load='4trg' size='340' side='right'caption='[[4trg]], [[Resolution|resolution]] 2.59&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4trg]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Legionella_pneumophila Legionella pneumophila]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4TRG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4TRG 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]] 2.59&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=HG:MERCURY+(II)+ION'>HG</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=4trg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4trg OCA], [https://pdbe.org/4trg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4trg RCSB], [https://www.ebi.ac.uk/pdbsum/4trg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4trg ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q6RCR4_LEGPN Q6RCR4_LEGPN] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The activity of proteins delivered into host cells by the Dot/Icm injection apparatus allows Legionella pneumophila to establish a niche called the Legionella-containing vacuole (LCV), which is permissive for intracellular bacterial propagation. Among these proteins, substrate of Icm/Dot transporter (SidC) anchors to the cytoplasmic surface of the LCV and is important for the recruitment of host endoplasmic reticulum (ER) proteins to this organelle. However, the biochemical function underlying this activity is unknown. Here, we determined the structure of the N-terminal domain of SidC, which has no structural homology to any protein. Sequence homology analysis revealed a potential canonical catalytic triad formed by Cys46, His444, and Asp446 on the surface of SidC. Unexpectedly, we found that SidC is an E3 ubiquitin ligase that uses the C-H-D triad to catalyze the formation of high-molecular-weight polyubiquitin chains through multiple ubiquitin lysine residues. A C46A mutation completely abolished the E3 ligase activity and the ability of the protein to recruit host ER proteins as well as polyubiquitin conjugates to the LCV. Thus, SidC represents a unique E3 ubiquitin ligase family important for phagosomal membrane remodeling by L. pneumophila.

The Legionella effector SidC defines a unique family of ubiquitin ligases important for bacterial phagosomal remodeling.,Hsu F, Luo X, Qiu J, Teng YB, Jin J, Smolka MB, Luo ZQ, Mao Y Proc Natl Acad Sci U S A. 2014 Jul 8. pii: 201402605. PMID:25006264<ref>PMID:25006264</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4trg" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Legionella pneumophila]]
[[Category: Hsu FS]]
[[Category: Jin J]]
[[Category: Luo X]]
[[Category: Luo ZQ]]
[[Category: Mao Y]]
[[Category: Qiu J]]
[[Category: Smolka MB]]
[[Category: Teng Y]]