4eob: Difference between revisions
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==Structure of the type VI peptidoglycan amidase effector Tse1 from Pseudomonas aeruginosa== | |||
<StructureSection load='4eob' size='340' side='right'caption='[[4eob]], [[Resolution|resolution]] 2.61Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[4eob]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_aeruginosa_PAO1 Pseudomonas aeruginosa PAO1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4EOB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4EOB 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]] 2.611Å</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=4eob FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4eob OCA], [https://pdbe.org/4eob PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4eob RCSB], [https://www.ebi.ac.uk/pdbsum/4eob PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4eob ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/TSE1_PSEAE TSE1_PSEAE] Toxin secreted by the H1 type VI (H1-T6SS) secretion system into the periplasm of recipient cells. Degrades peptidoglycan via amidase activity thereby helping itself to compete with other bacteria (PubMed:21776080, PubMed:22700987, PubMed:22813741, PubMed:22931054). To protect itself, the bacterium synthesizes immunity protein Tsi1 that specifically interacts with and inactivates cognate toxin (PubMed:21776080, PubMed:22700987, PubMed:22931054).<ref>PMID:21776080</ref> <ref>PMID:22700987</ref> <ref>PMID:22813741</ref> <ref>PMID:22931054</ref> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The target range of a bacterial secretion system can be defined by effector substrate specificity or by the efficacy of effector delivery. Here, we report the crystal structure of Tse1, a type VI secretion (T6S) bacteriolytic amidase effector from Pseudomonas aeruginosa. Consistent with its role as a toxin, Tse1 has a more accessible active site than related housekeeping enzymes. The activity of Tse1 against isolated peptidoglycan shows its capacity to act broadly against Gram-negative bacteria and even certain Gram-positive species. Studies with intact cells indicate that Gram-positive bacteria can remain vulnerable to Tse1 despite cell wall modifications. However, interbacterial competition studies demonstrate that Tse1-dependent lysis is restricted to Gram-negative targets. We propose that the previously observed specificity for T6S against Gram-negative bacteria is a consequence of high local effector concentration achieved by T6S-dependent targeting to its site of action rather than inherent effector substrate specificity. | |||
Structure of a peptidoglycan amidase effector targeted to Gram-negative bacteria by the type VI secretion system.,Chou S, Bui NK, Russell AB, Lexa KW, Gardiner TE, LeRoux M, Vollmer W, Mougous JD Cell Rep. 2012 Jun 28;1(6):656-64. Epub 2012 May 31. PMID:22813741<ref>PMID:22813741</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 4eob" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Pseudomonas aeruginosa PAO1]] | |||
[[Category: | [[Category: Chou S]] | ||
[[Category: | [[Category: Mougous JD]] | ||
[[Category: | |||
[[Category: | |||
