View source for 2whn


==N-terminal domain from the PilC type IV pilus biogenesis protein==
<StructureSection load='2whn' size='340' side='right'caption='[[2whn]], [[Resolution|resolution]] 2.05&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2whn]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_thermophilus_HB8 Thermus thermophilus HB8]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2WHN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2WHN 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]] 2.05&#8491;</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=2whn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2whn OCA], [https://pdbe.org/2whn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2whn RCSB], [https://www.ebi.ac.uk/pdbsum/2whn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2whn ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PILC_THET8 PILC_THET8] Essential inner membrane component of the type IV pilus (T4P) that plays a role in surface and host cell adhesion, colonization, biofilm maturation, virulence, and twitching, a form of surface-associated motility facilitated by cycles of extension, adhesion, and retraction of T4P fibers. Controls both pilus assembly and disassembly and plays an important role in PilB localization to the complex and ATPase activity.[UniProtKB:P22609]
== 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/wh/2whn_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=2whn ConSurf].
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== Publication Abstract from PubMed ==
Type IV pili are expressed from a wide variety of Gram-negative bacteria and play a major role in host cell adhesion and bacterial motility. PilC is one of at least a dozen different proteins that are implicated in Type IV pilus assembly in Thermus thermophilus and a member of a conserved family of integral inner membrane proteins which are components of the Type II secretion system (GspF) and the archeal flagellum. PilC/GspF family members contain repeats of a conserved helix-rich domain of around 100 residues in length. Here, we describe the crystal structure of one of these domains, derived from the N-terminal domain of Thermus thermophilus PilC. The N-domain forms a dimer, adopting a six helix bundle structure with an up-down-up-down-up-down topology. The monomers are related by a rotation of 170 degrees , followed by a translation along the axis of the final alpha-helix of approximately one helical turn. This means that the regions of contact on helices 5 and 6 in each monomer are overlapping, but different. Contact between the two monomers is mediated by a network of hydrophobic residues which are highly conserved in PilC homologs from other Gram-negative bacteria. Site-directed mutagenesis of residues at the dimer interface resulted in a change in oligomeric state of PilC from tetramers to dimers, providing evidence that this interface is also found in the intact membrane protein and suggesting that it is important to its function.

Structure and oligomerization of the PilC type IV pilus biogenesis protein from Thermus thermophilus.,Karuppiah V, Hassan D, Saleem M, Derrick JP Proteins. 2010 Jul;78(9):2049-57. PMID:20455262<ref>PMID:20455262</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Thermus thermophilus HB8]]
[[Category: Derrick JP]]
[[Category: Hassan D]]
[[Category: Karuppiah V]]
[[Category: Saleem M]]