6v3j

KIR3DL1 in complex with HLA-B*57:03 presenting the peptide LSSPVTKSFKIR3DL1 in complex with HLA-B*57:03 presenting the peptide LSSPVTKSF

Structural highlights 6v3j is a 4 chain structure with sequence from Homo sapiens and Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.98Å Ligands: Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function I3ZN84_HUMAN Involved in the presentation of foreign antigens to the immune system.[SAAS:SAAS00291881] Publication Abstract from PubMed Micropolymorphisms within human leukocyte antigen (HLA) class I molecules can change the architecture of the peptide-binding cleft, leading to differences in peptide presentation and T cell recognition. The impact of such HLA variation on natural killer (NK) cell recognition remains unclear. Given the differential association of HLA-B*57:01 and HLA-B*57:03 with the control of HIV, recognition of these HLA-B57 allomorphs by the killer cell immunoglobulin-like receptor (KIR) 3DL1 was compared. Despite differing by only two polymorphic residues, both buried within the peptide-binding cleft, HLA-B*57:01 more potently inhibited NK cell activation. Direct-binding studies showed KIR3DL1 to preferentially recognize HLA-B*57:01, particularly when presenting peptides with positively charged position (P)Omega-2 residues. In HLA-B*57:01, charged POmega-2 residues were oriented toward the peptide-binding cleft and away from KIR3DL1. In HLA-B*57:03, the charged POmega-2 residues protruded out from the cleft and directly impacted KIR3DL1 engagement. Accordingly, KIR3DL1 recognition of HLA class I ligands is modulated by both the peptide sequence and conformation, as determined by the HLA polymorphic framework, providing a rationale for understanding differences in clinical associations. The molecular basis of how buried human leukocyte antigen polymorphism modulates natural killer cell function.,Saunders PM, MacLachlan BJ, Pymm P, Illing PT, Deng Y, Wong SC, Oates CVL, Purcell AW, Rossjohn J, Vivian JP, Brooks AG Proc Natl Acad Sci U S A. 2020 May 13. pii: 1920570117. doi:, 10.1073/pnas.1920570117. PMID:32404419 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Beta-2 microglobulin 3D structures MHC 3D structures MHC I 3D structures NK cell receptor

spinqualitylabelsall models 6v3j, resolution 1.98Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image