View source for 4rdb


==Crystal structure of an immunoreactive 32 kDa antigen PG49 (PG_0181) from Porphyromonas gingivalis W83 at 1.45 A resolution (PSI Community Target, Nakayama)==
<StructureSection load='4rdb' size='340' side='right'caption='[[4rdb]], [[Resolution|resolution]] 1.45&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4rdb]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Porphyromonas_gingivalis_W83 Porphyromonas gingivalis W83]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4RDB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4RDB 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]] 1.45&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACN:ACETONE'>ACN</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</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=4rdb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4rdb OCA], [https://pdbe.org/4rdb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4rdb RCSB], [https://www.ebi.ac.uk/pdbsum/4rdb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4rdb ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/MFA4_PORGI MFA4_PORGI] Tip subunit of the minor fimbriae (PubMed:27062925). 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. They play an important role in invasion of periodontal tissues and are recognized as major virulence factors (Probable).[UniProtKB:B2RHG4]<ref>PMID:27062925</ref> 
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== Publication Abstract from PubMed ==
Pili are proteinaceous polymers of linked pilins that protrude from the cell surface of many bacteria and often mediate adherence and virulence. We investigated a set of 20 Bacteroidia pilins from the human microbiome whose structures and mechanism of assembly were unknown. Crystal structures and biochemical data revealed a diverse protein superfamily with a common Greek-key beta sandwich fold with two transthyretin-like repeats that polymerize into a pilus through a strand-exchange mechanism. The assembly mechanism of the central, structural pilins involves proteinase-assisted removal of their N-terminal beta strand, creating an extended hydrophobic groove that binds the C-terminal donor strands of the incoming pilin. Accessory pilins at the tip and base have unique structural features specific to their location, allowing initiation or termination of the assembly. The Bacteroidia pilus, therefore, has a biogenesis mechanism that is distinct from other known pili and likely represents a different type of bacterial pilus.

A Distinct Type of Pilus from the Human Microbiome.,Xu Q, Shoji M, Shibata S, Naito M, Sato K, Elsliger MA, Grant JC, Axelrod HL, Chiu HJ, Farr CL, Jaroszewski L, Knuth MW, Deacon AM, Godzik A, Lesley SA, Curtis MA, Nakayama K, Wilson IA Cell. 2016 Apr 21;165(3):690-703. doi: 10.1016/j.cell.2016.03.016. Epub 2016 Apr , 7. PMID:27062925<ref>PMID:27062925</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
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== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Porphyromonas gingivalis W83]]