View source for 3txa


==Structural Analysis of Adhesive Tip pilin, GBS104 from Group B Streptococcus agalactiae==
<StructureSection load='3txa' size='340' side='right'caption='[[3txa]], [[Resolution|resolution]] 2.62&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3txa]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptococcus_agalactiae_serogroup_V Streptococcus agalactiae serogroup V]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3TXA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3TXA 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]] 2.619&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CD:CADMIUM+ION'>CD</scene>, <scene name='pdbligand=LI:LITHIUM+ION'>LI</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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=3txa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3txa OCA], [https://pdbe.org/3txa PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3txa RCSB], [https://www.ebi.ac.uk/pdbsum/3txa PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3txa ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q8E0S5_STRA5 Q8E0S5_STRA5] 
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== Publication Abstract from PubMed ==
The crystal structure of a 75 kDa central fragment of GBS104, a tip pilin from the 2063V/R strain of Streptococcus agalactiae (group B streptococcus; GBS), is reported. In addition, a homology model of the remaining two domains of GBS104 was built and a model of full-length GBS104 was generated by combining the homology model (the N1 and N4 domains) and the crystal structure of the 75 kDa fragment (the N2 and N3 domains). This rod-shaped GBS104 model is constructed of three IgG-like domains (the N1, N2 and N4 domains) and one vWFA-like domain (the N3 domain). The N1 and N2 domains of GBS104 are assembled with distinct and remote segments contributed by the N- and C-termini. The metal-binding site in the N3 domain of GBS104 is in the closed/low-affinity conformation. Interestingly, this domain hosts two long arms that project away from the metal-binding site. Using site-directed mutagenesis, two cysteine residues that lock the N3 domain of GBS104 into the open/high-affinity conformation were introduced. Both wild-type and disulfide-locked recombinant proteins were tested for binding to extracellular matrix proteins such as collagen, fibronectin, fibrinogen and laminin, and an increase in fibronectin binding affinity was identified for the disulfide-locked N3 domain, suggesting that induced conformational changes may play a possible role in receptor binding.

Structure of Streptococcus agalactiae tip pilin GBS104: a model for GBS pili assembly and host interactions.,Krishnan V, Dwivedi P, Kim BJ, Samal A, Macon K, Ma X, Mishra A, Doran KS, Ton-That H, Narayana SV Acta Crystallogr D Biol Crystallogr. 2013 Jun;69(Pt 6):1073-89. doi:, 10.1107/S0907444913004642. Epub 2013 May 15. PMID:23695252<ref>PMID:23695252</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 3txa" style="background-color:#fffaf0;"></div>

==See Also==
*[[Pilin 3D structures|Pilin 3D structures]]
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Streptococcus agalactiae serogroup V]]
[[Category: Krishnan V]]
[[Category: Narayana SVL]]