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[[Image:1p4l.gif|left|200px]]
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{{STRUCTURE_1p4l|  PDB=1p4l  |  SCENE=  }}
'''Crystal structure of NK receptor Ly49C mutant with its MHC class I ligand H-2Kb'''


==Crystal structure of NK receptor Ly49C mutant with its MHC class I ligand H-2Kb==
<StructureSection load='1p4l' size='340' side='right'caption='[[1p4l]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1p4l]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Gallus_gallus Gallus gallus] 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=1P4L OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1P4L 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]] 2.9&#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=1p4l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1p4l OCA], [https://pdbe.org/1p4l PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1p4l RCSB], [https://www.ebi.ac.uk/pdbsum/1p4l PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1p4l ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/HA1B_MOUSE HA1B_MOUSE] Involved in the presentation of foreign antigens to the immune system.
== 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/p4/1p4l_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=1p4l ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The Ly49 family of natural killer (NK) receptors regulates NK cell function by sensing major histocompatibility complex (MHC) class I. Ly49 receptors show complex patterns of MHC class I cross-reactivity and, in certain cases, peptide selectivity. To investigate whether specificity differences result from topological differences in MHC class I engagement, we determined the structure of the peptide-selective receptor Ly49C in complex with H-2K(b). The Ly49C homodimer binds two MHC class I molecules in symmetrical way, a mode distinct from that of Ly49A, which binds MHC class I asymmetrically. Ly49C does not directly contact the MHC-bound peptide. In addition, MHC crosslinking by Ly49C was demonstrated in solution. We propose a dynamic model for Ly49-MHC class I interactions involving conformational changes in the receptor, whereby variations in Ly49 dimerization mediate different MHC-binding modes.


==Overview==
Variable MHC class I engagement by Ly49 natural killer cell receptors demonstrated by the crystal structure of Ly49C bound to H-2K(b).,Dam J, Guan R, Natarajan K, Dimasi N, Chlewicki LK, Kranz DM, Schuck P, Margulies DH, Mariuzza RA Nat Immunol. 2003 Dec;4(12):1213-22. Epub 2003 Nov 2. PMID:14595439<ref>PMID:14595439</ref>
The Ly49 family of natural killer (NK) receptors regulates NK cell function by sensing major histocompatibility complex (MHC) class I. Ly49 receptors show complex patterns of MHC class I cross-reactivity and, in certain cases, peptide selectivity. To investigate whether specificity differences result from topological differences in MHC class I engagement, we determined the structure of the peptide-selective receptor Ly49C in complex with H-2K(b). The Ly49C homodimer binds two MHC class I molecules in symmetrical way, a mode distinct from that of Ly49A, which binds MHC class I asymmetrically. Ly49C does not directly contact the MHC-bound peptide. In addition, MHC crosslinking by Ly49C was demonstrated in solution. We propose a dynamic model for Ly49-MHC class I interactions involving conformational changes in the receptor, whereby variations in Ly49 dimerization mediate different MHC-binding modes.


==About this Structure==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
1P4L is a [[Protein complex]] structure of sequences 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=1P4L OCA].
</div>
<div class="pdbe-citations 1p4l" style="background-color:#fffaf0;"></div>


==Reference==
==See Also==
Variable MHC class I engagement by Ly49 natural killer cell receptors demonstrated by the crystal structure of Ly49C bound to H-2K(b)., Dam J, Guan R, Natarajan K, Dimasi N, Chlewicki LK, Kranz DM, Schuck P, Margulies DH, Mariuzza RA, Nat Immunol. 2003 Dec;4(12):1213-22. Epub 2003 Nov 2. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/14595439 14595439]
*[[Beta-2 microglobulin 3D structures|Beta-2 microglobulin 3D structures]]
*[[MHC 3D structures|MHC 3D structures]]
*[[MHC I 3D structures|MHC I 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Gallus gallus]]
[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: Mus musculus]]
[[Category: Protein complex]]
[[Category: Dam J]]
[[Category: Dam, J.]]
[[Category: Dimasi N]]
[[Category: Dimasi, N.]]
[[Category: Guan R]]
[[Category: Guan, R.]]
[[Category: Mariuzza RA]]
[[Category: Mariuzza, R A.]]
[[Category: Natarajan K]]
[[Category: Natarajan, K.]]
[[Category: C-type lectin-like domain]]
[[Category: Crystal structure]]
[[Category: Mhc class i]]
[[Category: Natural killer receptor]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 04:40:49 2008''

Latest revision as of 08:43, 6 November 2024

Crystal structure of NK receptor Ly49C mutant with its MHC class I ligand H-2Kb

1p4l, resolution 2.90Å

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