View source for 2uy7


==Crystal structure of the P pilus rod subunit PapA==
<StructureSection load='2uy7' size='340' side='right'caption='[[2uy7]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2uy7]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895] and [https://en.wikipedia.org/wiki/Ecout Ecout]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2UY7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2UY7 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[2uy6|2uy6]], [[1n0l|1n0l]], [[1pdk|1pdk]], [[1qpp|1qpp]], [[1qpx|1qpx]], [[2j2z|2j2z]], [[2j7l|2j7l]], [[3dpa|3dpa]]</div></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=2uy7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2uy7 OCA], [https://pdbe.org/2uy7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2uy7 RCSB], [https://www.ebi.ac.uk/pdbsum/2uy7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2uy7 ProSAT]</span></td></tr>
</table>
== Function ==
[[https://www.uniprot.org/uniprot/PAPA_ECOLX PAPA_ECOLX]] Polymerizes to form the thick (6.8 nm in diameter) rod of the pilus (also called fimbria). The rod is a right-handed helical cylinder with 3.28 PapA subunits per turn. Pili are polar filaments radiating from the surface of the bacterium to a length of 0.5-1.5 micrometers and numbering 100-300 per cell, and enable bacteria to colonize the epithelium of specific host organs. 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/uy/2uy7_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2uy7 ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
P pili are important adhesive fibres involved in kidney infection by uropathogenic Escherichia coli strains. P pili are assembled by the conserved chaperone-usher pathway, which involves the PapD chaperone and the PapC usher. During pilus assembly, subunits are incorporated into the growing fiber via the donor-strand exchange (DSE) mechanism, whereby the chaperone's G1 beta-strand that complements the incomplete immunoglobulin-fold of each subunit is displaced by the N-terminal extension (Nte) of an incoming subunit. P pili comprise a helical rod, a tip fibrillum, and an adhesin at the distal end. PapA is the rod subunit and is assembled into a superhelical right-handed structure. Here, we have solved the structure of a ternary complex of PapD bound to PapA through donor-strand complementation, itself bound to another PapA subunit through DSE. This structure provides insight into the structural basis of the DSE reaction involving this important pilus subunit. Using gel filtration chromatography and electron microscopy on a number of PapA Nte mutants, we establish that PapA differs in its mode of assembly compared with other Pap subunits, involving a much larger Nte that encompasses not only the DSE region of the Nte but also the region N-terminal to it.

Crystal structure of the P pilus rod subunit PapA.,Verger D, Bullitt E, Hultgren SJ, Waksman G PLoS Pathog. 2007 May 18;3(5):e73. PMID:17511517<ref>PMID:17511517</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 2uy7" style="background-color:#fffaf0;"></div>

==See Also==
*[[Pilin 3D structures|Pilin 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Bacillus coli migula 1895]]
[[Category: Ecout]]
[[Category: Large Structures]]
[[Category: Bullitt, E]]
[[Category: Hultgren, S J]]
[[Category: Verger, D]]
[[Category: Waksman, G]]
[[Category: Chaperone]]
[[Category: Donor strand complementation]]
[[Category: Donor-strand exchange]]
[[Category: Dsc]]
[[Category: Dse]]
[[Category: Fimbria]]
[[Category: Nte]]
[[Category: Papa]]
[[Category: Papd]]
[[Category: Pili/n-terminal extension]]
[[Category: Pilus biogenesis]]