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1m4k

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{{STRUCTURE_1m4k| PDB=1m4k | SCENE= }}
{{STRUCTURE_1m4k| PDB=1m4k | SCENE= }}
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'''Crystal structure of the human natural killer cell activator receptor KIR2DS2 (CD158j)'''
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===Crystal structure of the human natural killer cell activator receptor KIR2DS2 (CD158j)===
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==Overview==
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Killer cell Ig-like receptors (KIRs) regulate the function of human natural killer and T cell subsets. A feature of the KIR locus is the clustering of homologous genes encoding for inhibitory and activating KIR. Inhibitory and activating KIR differ for ligand specificities and/or affinities. In particular, we show here with KIR tetramers that activating KIR2DS2 does not bind HLA-Cw3 molecules recognized by inhibitory KIR2DL2, despite 99% extracellular amino acid identity. We also report the 2.3-A structure of KIR2DS2, which reveals subtle displacements of two residues (Tyr45 and Gln71) involved in the interaction of KIR2DL2 with HLA-Cw3. These results show that KIR molecules cannot tolerate any variability in their three-dimensional structure without altering their MHC class I recognition capacities. Therefore, the mode of recognition used by KIR largely differs from the conformational changes that characterize T cell receptor or NKG2D interaction with their respective ligands.
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(as it appears on PubMed at http://www.pubmed.gov), where 12668644 is the PubMed ID number.
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{{ABSTRACT_PUBMED_12668644}}
==About this Structure==
==About this Structure==
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[[Category: Beta-sandwich]]
[[Category: Beta-sandwich]]
[[Category: Ig-like c2 type domain]]
[[Category: Ig-like c2 type domain]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 00:37:20 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jul 2 23:11:35 2008''

Revision as of 20:11, 2 July 2008

Image:1m4k.png

Template:STRUCTURE 1m4k

Crystal structure of the human natural killer cell activator receptor KIR2DS2 (CD158j)

Template:ABSTRACT PUBMED 12668644

About this Structure

1M4K is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Crystal structure of the human natural killer cell activating receptor KIR2DS2 (CD158j)., Saulquin X, Gastinel LN, Vivier E, J Exp Med. 2003 Apr 7;197(7):933-8. Epub 2003 Mar 31. PMID:12668644

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