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| | <StructureSection load='6uie' size='340' side='right'caption='[[6uie]], [[Resolution|resolution]] 2.55Å' scene=''> | | <StructureSection load='6uie' size='340' side='right'caption='[[6uie]], [[Resolution|resolution]] 2.55Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[6uie]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_aeruginosus"_(schroeter_1872)_trevisan_1885 "bacillus aeruginosus" (schroeter 1872) trevisan 1885]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6UIE OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6UIE FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6uie]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_aeruginosa Pseudomonas aeruginosa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6UIE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6UIE FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.55Å</td></tr> |
| - | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">pscK ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=287 "Bacillus aeruginosus" (Schroeter 1872) Trevisan 1885])</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=6uie FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6uie OCA], [https://pdbe.org/6uie PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6uie RCSB], [https://www.ebi.ac.uk/pdbsum/6uie PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6uie ProSAT]</span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6uie FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6uie OCA], [http://pdbe.org/6uie PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6uie RCSB], [http://www.ebi.ac.uk/pdbsum/6uie PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6uie ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/Q9I313_PSEAE Q9I313_PSEAE] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Battaile, K P]] | + | [[Category: Pseudomonas aeruginosa]] |
| - | [[Category: Lovell, S]] | + | [[Category: Battaile KP]] |
| - | [[Category: Muthuramalingam, M]] | + | [[Category: Lovell S]] |
| - | [[Category: Picking, W D]] | + | [[Category: Muthuramalingam M]] |
| - | [[Category: Psck]] | + | [[Category: Picking WD]] |
| - | [[Category: Transport protein]]
| + | |
| - | [[Category: Type iii secretion apparatus protein]]
| + | |
| Structural highlights
Function
Q9I313_PSEAE
Publication Abstract from PubMed
Many Gram-negative bacterial pathogens use type III secretion systems (T3SS) to inject proteins into eukaryotic cells to subvert normal cellular functions. The T3SS apparatus (injectisome) shares a common architecture in all systems studied thus far, comprising three major components - the cytoplasmic sorting platform, envelope-spanning basal body and external needle with tip complex. The sorting platform consists of an ATPase (SctN) connected to "pods" (SctQ) having six-fold symmetry via radial spokes (SctL). These pods interface with the 24-fold symmetric SctD inner membrane ring (IR) via an adaptor protein (SctK). Here we report the first high-resolution structure of a SctK protein family member, PscK from Pseudomonas aeruginosa, as well as the structure of its interacting partner, the cytoplasmic domain of PscD (SctD). The cytoplasmic domain of PscD forms a forkhead-associated (FHA) fold, like that of its homologues from other T3SS. PscK, on the other hand, forms a helix-rich structure that does not resemble any known protein fold. Based on these structural findings, we present the first model for an interaction between proteins from the sorting platform and the IR. We also test the importance of the PscD residues predicted to mediate this electrostatic interaction using a two-hybrid analysis. The functional need for these residues in vivo was then confirmed by monitoring secretion of the effector ExoU. These structures will contribute to the development of atomic-resolution models of the entire sorting platform and to our understanding of the mechanistic interface between the sorting platform and the basal body of the injectisome.
The Structures of SctK and SctD from Pseudomonas aeruginosa Reveal the Interface of the Type III Secretion System Basal Body and Sorting Platform.,Muthuramalingam M, Whittier SK, Lovell S, Battaile KP, Tachiyama S, Johnson DK, Picking WL, Picking WD J Mol Biol. 2020 Oct 26. pii: S0022-2836(20)30602-1. doi:, 10.1016/j.jmb.2020.10.027. PMID:33122003[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Muthuramalingam M, Whittier SK, Lovell S, Battaile KP, Tachiyama S, Johnson DK, Picking WL, Picking WD. The Structures of SctK and SctD from Pseudomonas aeruginosa Reveal the Interface of the Type III Secretion System Basal Body and Sorting Platform. J Mol Biol. 2020 Oct 26. pii: S0022-2836(20)30602-1. doi:, 10.1016/j.jmb.2020.10.027. PMID:33122003 doi:http://dx.doi.org/10.1016/j.jmb.2020.10.027
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