View source for 1uac


==Crystal Structure of HYHEL-10 FV MUTANT SFSF Complexed with TURKEY WHITE LYSOZYME==
<StructureSection load='1uac' size='340' side='right'caption='[[1uac]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1uac]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Meleagris_gallopavo Meleagris gallopavo] and [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UAC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1UAC 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]] 1.7&#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=1uac FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1uac OCA], [https://pdbe.org/1uac PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1uac RCSB], [https://www.ebi.ac.uk/pdbsum/1uac PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1uac ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/LYSC_MELGA LYSC_MELGA] Lysozymes have primarily a bacteriolytic function; those in tissues and body fluids are associated with the monocyte-macrophage system and enhance the activity of immunoagents.
== 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/ua/1uac_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=1uac ConSurf].
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== Publication Abstract from PubMed ==
Decreased affinity of an antibody for a mutated epitope in an antigen can be enhanced and reversed by mutations in certain antibody residues. Here we describe the crystal structures of (a) the complex between a naturally mutated proteinaceous antigen and an antibody that was mutated and selected in vitro, and (b) the complex between the normal antigen and the mutated antibody. The mutated and selected antibody recognizes essentially the same epitope as in the wild-type antibody, indicating successful target site-directed functional alteration of the antibody. In comparing the structure of the mutated antigen-mutant antibody complex with the previously established structure of the wild-type antigen-wild-type antibody complex, we found that the enhanced affinity of the mutated antibody for the mutant antigen originated not from improvements in local complementarity around the mutated sites but from subtle and critical structural changes in nonmutated sites, including an increase in variable domain interactions. Our findings indicate that only a few mutations in the antigen-binding region of an antibody can lead to some structural changes in its paratopes, emphasizing the critical roles of the plasticity of loops in the complementarity-determining region and also the importance of the plasticity of the interaction between the variable regions of immunoglobulin heavy and light chains in determining the specificity of an antibody.

Structural consequences of target epitope-directed functional alteration of an antibody. The case of anti-hen lysozyme antibody, HyHEL-10.,Kumagai I, Nishimiya Y, Kondo H, Tsumoto K J Biol Chem. 2003 Jul 4;278(27):24929-36. Epub 2003 Apr 22. PMID:12709438<ref>PMID:12709438</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
*[[Lysozyme 3D structures|Lysozyme 3D structures]]
*[[Monoclonal Antibodies 3D structures|Monoclonal Antibodies 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Meleagris gallopavo]]
[[Category: Mus musculus]]
[[Category: Kondo H]]
[[Category: Kumagai I]]
[[Category: Nishimiya Y]]
[[Category: Tsumoto K]]