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2016 ; 213
(5
): 791-807
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English Wikipedia
Killer cell immunoglobulin-like receptor 3DL1 polymorphism defines distinct
hierarchies of HLA class I recognition
#MMPMID27045007
Saunders PM
; Pymm P
; Pietra G
; Hughes VA
; Hitchen C
; O'Connor GM
; Loiacono F
; Widjaja J
; Price DA
; Falco M
; Mingari MC
; Moretta L
; McVicar DW
; Rossjohn J
; Brooks AG
; Vivian JP
J Exp Med
2016[May]; 213
(5
): 791-807
PMID27045007
show ga
Natural killer (NK) cells play a key role in immunity, but how HLA class I
(HLA-I) and killer cell immunoglobulin-like receptor 3DL1 (KIR3DL1) polymorphism
impacts disease outcome remains unclear. KIR3DL1 (*001/*005/*015) tetramers were
screened for reactivity against a panel of HLA-I molecules. This revealed
different and distinct hierarchies of specificity for each KIR3DL1 allotype, with
KIR3DL1*005 recognizing the widest array of HLA-I ligands. These differences were
further reflected in functional studies using NK clones expressing these specific
KIR3DL1 allotypes. Unexpectedly, the Ile/Thr80 dimorphism in the Bw4-motif did
not categorically define strong/weak KIR3DL1 recognition. Although the
KIR3DL1*001, *005, and *015 polymorphisms are remote from the KIR3DL1-HLA-I
interface, the structures of these three KIR3DL1-HLA-I complexes showed that the
broader HLA-I specificity of KIR3DL1*005 correlated with an altered KIR3DL1*005
interdomain positioning and increased mobility within its ligand-binding site.
Collectively, we provide a generic framework for understanding the impact of
KIR3DL1 polymorphism on the recognition of HLA-I allomorphs.
|*Polymorphism, Genetic
[MESH]
|Amino Acid Motifs
[MESH]
|Cell Line
[MESH]
|Female
[MESH]
|Histocompatibility Antigens Class I/chemistry/*genetics/*immunology
[MESH]