View source for 1q9o

==S45-18 Fab Unliganded==
<StructureSection load='1q9o' size='340' side='right' caption='[[1q9o]], [[Resolution|resolution]] 1.79&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1q9o]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Q9O OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1Q9O FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1q9k|1q9k]], [[1q9l|1q9l]], [[1q9q|1q9q]], [[1q9r|1q9r]], [[1q9t|1q9t]], [[1q9v|1q9v]], [[1q9w|1q9w]]</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1q9o FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1q9o OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1q9o RCSB], [http://www.ebi.ac.uk/pdbsum/1q9o PDBsum]</span></td></tr>
</table>
== 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/q9/1q9o_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/chain_selection.php?pdb_ID=2ata ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
High-resolution structures reveal how a germline antibody can recognize a range of clinically relevant carbohydrate epitopes. The germline response to a carbohydrate immunogen can be critical to survivability, with selection for antibody gene segments that both confer protection against common pathogens and retain the flexibility to adapt to new disease organisms. We show here that antibody S25-2 binds several distinct inner-core epitopes of bacterial lipopolysaccharides (LPSs) by linking an inherited monosaccharide residue binding site with a subset of complementarity-determining regions (CDRs) of limited flexibility positioned to recognize the remainder of an array of different epitopes. This strategy allows germline antibodies to adapt to different epitopes while minimizing entropic penalties associated with the immobilization of labile CDRs upon binding of antigen, and provides insight into the link between the genetic origin of individual CDRs and their respective roles in antigen recognition.

Germline antibody recognition of distinct carbohydrate epitopes.,Nguyen HP, Seto NO, MacKenzie CR, Brade L, Kosma P, Brade H, Evans SV Nat Struct Biol. 2003 Dec;10(12):1019-25. Epub 2003 Nov 16. PMID:14625588<ref>PMID:14625588</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>

==See Also==
*[[Antibody|Antibody]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Mus musculus]]
[[Category: Brade, H]]
[[Category: Brade, L]]
[[Category: Evans, S V]]
[[Category: Kosma, P]]
[[Category: MacKenzie, C R]]
[[Category: Nguyen, H P]]
[[Category: Seto, N O]]
[[Category: Anti-carbohydrate]]
[[Category: Anti-lp]]
[[Category: Antibody]]
[[Category: Antigen-binding fragment]]
[[Category: Fab]]
[[Category: Immune system]]
[[Category: Immunoglobulin]]