LILRA3 Binds HLA Class I Molecules with Reduced Affinities
Author Information
Author(s): Ryu Myongchol, Chen Yong, Qi Jianxun, Liu Jun, Fan Zheng, Nam Gol, Shi Yi, Cheng Hao, Gao George F.
Primary Institution: CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
Hypothesis
LILRA3 binds to HLA class I molecules, but with reduced affinities compared to other LILR family members.
Conclusion
LILRA3 binds both classical and non-classical HLA class I molecules, but with lower affinities than LILRB1 and LILRB2.
Supporting Evidence
- LILRA3 is the only secreted member of the LILR family.
- LILRA3 binds both classical HLA-A*0201 and non-classical HLA-G1.
- The binding affinity of LILRA3 is reduced compared to LILRB1 and LILRB2.
- The crystal structure of LILRA3 D1 domain supports its ability to bind HLA class I molecules.
Takeaway
LILRA3 is a special protein that can attach to certain immune molecules, but it doesn't hold on as tightly as some other similar proteins.
Methodology
The study used BIAcore® surface plasmon resonance analysis to evaluate the binding of LILRA3 to HLA class I molecules.
Limitations
The study did not explore the functional implications of LILRA3 binding in vivo.
Digital Object Identifier (DOI)
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