View source for 3v4u


==Structure of a monoclonal antibody complexed with its MHC-I antigen==
<StructureSection load='3v4u' size='340' side='right'caption='[[3v4u]], [[Resolution|resolution]] 1.64&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3v4u]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3V4U OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3V4U FirstGlance]. <br>
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[3uo1|3uo1]], [[3uyr|3uyr]], [[3v52|3v52]]</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=3v4u FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3v4u OCA], [https://pdbe.org/3v4u PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3v4u RCSB], [https://www.ebi.ac.uk/pdbsum/3v4u PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3v4u ProSAT]</span></td></tr>
</table>
== Function ==
[[https://www.uniprot.org/uniprot/HA1L_MOUSE HA1L_MOUSE]] Involved in the presentation of foreign antigens to the immune system. 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
MHC class I (MHC-I) proteins of the adaptive immune system require antigenic peptides for maintenance of mature conformation and immune function via specific recognition by MHC-I-restricted CD8(+) T lymphocytes. New MHC-I molecules in the endoplasmic reticulum are held by chaperones in a peptide-receptive (PR) transition state pending release by tightly binding peptides. In this study, we show, by crystallographic, docking, and molecular dynamics methods, dramatic movement of a hinged unit containing a conserved 3(10) helix that flips from an exposed "open" position in the PR transition state to a "closed" position with buried hydrophobic side chains in the peptide-loaded mature molecule. Crystallography of hinged unit residues 46-53 of murine H-2L(d) MHC-I H chain, complexed with mAb 64-3-7, demonstrates solvent exposure of these residues in the PR conformation. Docking and molecular dynamics predict how this segment moves to help form the A and B pockets crucial for the tight peptide binding needed for stability of the mature peptide-loaded conformation, chaperone dissociation, and Ag presentation.

The Peptide-receptive transition state of MHC class I molecules: insight from structure and molecular dynamics.,Mage MG, Dolan MA, Wang R, Boyd LF, Revilleza MJ, Robinson H, Natarajan K, Myers NB, Hansen TH, Margulies DH J Immunol. 2012 Aug 1;189(3):1391-9. Epub 2012 Jun 29. PMID:22753930<ref>PMID:22753930</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3v4u" style="background-color:#fffaf0;"></div>

==See Also==
*[[Monoclonal Antibodies 3D structures|Monoclonal Antibodies 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: Mage, M G]]
[[Category: Margulies, D H]]
[[Category: Natarajan, K]]
[[Category: Wang, R]]
[[Category: 3-10 helix]]
[[Category: Ig-fold]]
[[Category: Immune system]]