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| | ==CRYSTAL STRUCTURE OF C-TERMINAL DOMAIN OF CARGO PROTEINS OF TYPE IX SECRETION SYSTEM== | | ==CRYSTAL STRUCTURE OF C-TERMINAL DOMAIN OF CARGO PROTEINS OF TYPE IX SECRETION SYSTEM== |
| - | <StructureSection load='5hfs' size='340' side='right' caption='[[5hfs]], [[Resolution|resolution]] 1.97Å' scene=''> | + | <StructureSection load='5hfs' size='340' side='right'caption='[[5hfs]], [[Resolution|resolution]] 1.97Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[5hfs]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5HFS OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5HFS FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[5hfs]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Porphyromonas_gingivalis Porphyromonas gingivalis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5HFS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5HFS FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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]] 1.97Å</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Gingipain_R Gingipain R], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.22.37 3.4.22.37] </span></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <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'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5hfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5hfs OCA], [http://pdbe.org/5hfs PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5hfs RCSB], [http://www.ebi.ac.uk/pdbsum/5hfs PDBsum]</span></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=5hfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5hfs OCA], [https://pdbe.org/5hfs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5hfs RCSB], [https://www.ebi.ac.uk/pdbsum/5hfs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5hfs ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/CPG2_PORGI CPG2_PORGI]] Thiol protease which is believed to participate in intracellular degradation and turnover of proteins. Its proteolytic activity is a major factor in both periodontal tissue destruction and in bacterial host defense mechanisms. Activates complement C3 and C5 (By similarity). | + | [https://www.uniprot.org/uniprot/CPG2_PORGI CPG2_PORGI] Thiol protease which is believed to participate in intracellular degradation and turnover of proteins. Its proteolytic activity is a major factor in both periodontal tissue destruction and in bacterial host defense mechanisms. Activates complement C3 and C5 (By similarity). |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Gingipain R]] | + | [[Category: Large Structures]] |
| - | [[Category: Dubin, G]] | + | [[Category: Porphyromonas gingivalis]] |
| - | [[Category: Golik, P]] | + | [[Category: Dubin G]] |
| - | [[Category: Ksiazek, M]] | + | [[Category: Golik P]] |
| - | [[Category: Mizgalska, D]] | + | [[Category: Ksiazek M]] |
| - | [[Category: Nowak, M]] | + | [[Category: Mizgalska D]] |
| - | [[Category: Nowakowska, Z]] | + | [[Category: Nowak M]] |
| - | [[Category: Potempa, J]] | + | [[Category: Nowakowska Z]] |
| - | [[Category: Szmigielski, B]] | + | [[Category: Potempa J]] |
| - | [[Category: Hydrolase]]
| + | [[Category: Szmigielski B]] |
| - | [[Category: Ig-like domain]]
| + | |
| - | [[Category: Protease]]
| + | |
| - | [[Category: Type ix secretion system]]
| + | |
| Structural highlights
Function
CPG2_PORGI Thiol protease which is believed to participate in intracellular degradation and turnover of proteins. Its proteolytic activity is a major factor in both periodontal tissue destruction and in bacterial host defense mechanisms. Activates complement C3 and C5 (By similarity).
Publication Abstract from PubMed
In the recently characterized Type IX Secretion System (T9SS), the conserved C-terminal domain (CTD) in secreted proteins functions as an outer membrane translocation signal for export of virulence factors to the cell surface in the Gram-negative Bacteroidetes phylum. In the periodontal pathogen Porphyromonas gingivalis, the CTD is cleaved off by PorU sortase in a sequence-independent manner, and anionic lipopolysaccharide (A-LPS) is attached to many translocated proteins, thus anchoring them to the bacterial surface. Here, we solved the atomic structure of the CTD of gingipain B (RgpB) from P. gingivalis, alone and together with a preceding immunoglobulin-superfamily domain (IgSF). The CTD was found to possess a typical Ig-like fold encompassing seven antiparallel beta-strands organized in two beta-sheets, packed into a beta-sandwich structure that can spontaneously dimerise through C-terminal strand swapping. Small angle X-ray scattering (SAXS) revealed no fixed orientation of the CTD with respect to the IgSF. By introducing insertion or substitution of residues within the inter-domain linker in the native protein, we were able to show that despite the region being unstructured, it nevertheless is resistant to general proteolysis. These data suggest structural motifs located in the two adjacent Ig-like domains dictate the processing of CTDs by the T9SS secretion pathway.
The outer-membrane export signal of Porphyromonas gingivalis type IX secretion system (T9SS) is a conserved C-terminal beta-sandwich domain.,de Diego I, Ksiazek M, Mizgalska D, Koneru L, Golik P, Szmigielski B, Nowak M, Nowakowska Z, Potempa B, Houston JA, Enghild JJ, Thogersen IB, Gao J, Kwan AH, Trewhella J, Dubin G, Gomis-Ruth FX, Nguyen KA, Potempa J Sci Rep. 2016 Mar 23;6:23123. doi: 10.1038/srep23123. PMID:27005013[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ de Diego I, Ksiazek M, Mizgalska D, Koneru L, Golik P, Szmigielski B, Nowak M, Nowakowska Z, Potempa B, Houston JA, Enghild JJ, Thogersen IB, Gao J, Kwan AH, Trewhella J, Dubin G, Gomis-Ruth FX, Nguyen KA, Potempa J. The outer-membrane export signal of Porphyromonas gingivalis type IX secretion system (T9SS) is a conserved C-terminal beta-sandwich domain. Sci Rep. 2016 Mar 23;6:23123. doi: 10.1038/srep23123. PMID:27005013 doi:http://dx.doi.org/10.1038/srep23123
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