View source for 21co


==Mfa1 type V pilus from P.gingivalis==
<StructureSection load='21co' size='340' side='right'caption='[[21co]], [[Resolution|resolution]] 2.99&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[21co]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Porphyromonas_gingivalis_ATCC_33277 Porphyromonas gingivalis ATCC 33277]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=21CO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=21CO FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 2.99&#8491;</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></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=21co FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=21co OCA], [https://pdbe.org/21co PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=21co RCSB], [https://www.ebi.ac.uk/pdbsum/21co PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=21co ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/MFA1_PORG3 MFA1_PORG3] Structural subunit of the minor fimbriae (PubMed:12593606, PubMed:19589838, PubMed:24118823). These filamentous pili are attached to the cell surface; they mediate biofilm formation, adhesion onto host cells and onto other bacteria that are part of the oral microbiome (PubMed:11083792, PubMed:12593606, PubMed:15972485, PubMed:19589838, PubMed:23809984, PubMed:24118823, PubMed:26001707, PubMed:26437277). They play an important role in invasion of periodontal tissues and are recognized as major virulence factors. Mfa1 orthologs from different strains have highly divergent sequences, and this correlates with pathogenicity (Probable).<ref>PMID:11083792</ref> <ref>PMID:12593606</ref> <ref>PMID:15972485</ref> <ref>PMID:19589838</ref> <ref>PMID:23809984</ref> <ref>PMID:24118823</ref> <ref>PMID:26001707</ref> <ref>PMID:26437277</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Porphyromonas gingivalis is a primary pathogen causing periodontal disease. The cell has two kinds of type V pili, the Fim pilus and the Mfa pilus, both of which play essential roles in colonization, biofilm formation, and pathogenicity. The functional polymerized structure of the Fim pilus is known, whereas the structure and assembly mechanism of the Mfa pilus remain unclear. Here, we show the structure of the polymerized recombinant Mfa1 stalk pilin determined by cryo-electron microscopy at 3.0 A resolution. The atomic model of the Mfa1 filament reveals that Mfa1 pilins polymerize by protease-mediated strand exchange and retain a Ca(2+) ion in the metal-binding pocket, which modulates immune recognition of the Mfa pilus by human cells. Furthermore, we elucidated the three-dimensional architecture of the streptococcal-binding region on the Mfa pilus. Our results further strengthen evidence that protease-mediated strand exchange is the universal assembly mechanism of type V pili. Our structure of the polymerized Mfa pilus, which represents the functional state on the cell surface, provides targets for antimicrobial drug design to treat periodontal disease and P. gingivalis-related systemic diseases.

Cryo-EM structure of the native assembled Mfa type V pilus from the periodontal pathogen Porphyromonas gingivalis.,Shibata S, Matsunami H, Ouhara K, Taniguchi Y, Schreiber MT, Villar-Brillones A, Nakayama K, Shoji M, Wolf M Commun Biol. 2026 Jun 24. doi: 10.1038/s42003-026-10515-2. PMID:42336997<ref>PMID:42336997</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 21co" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Porphyromonas gingivalis ATCC 33277]]
[[Category: Matsunami H]]
[[Category: Shibata S]]
[[Category: Wolf M]]