6JTO

Crystal structure of HLA-C05 in complex with a tumor mut10m peptide

Summary for 6JTO

• Entry DOI: 10.2210/pdb6jto/pdb
• Descriptor: HLA class I histocompatibility antigen, Cw-5 alpha chain, Beta-2-microglobulin, 10-mer peptide, ... (4 entities in total)
• Functional Keywords: major histocompatibility complex, immune system, antigen, hla
• Biological source: Homo sapiens (Human); More
• Total number of polymer chains: 3
• Total formula weight: 44267.99

Authors

Bai, P.,Zhou, Q.,Wei, P.,Lei, Y. (deposition date: 2019-04-11, release date: 2020-04-15, Last modification date: 2021-05-19)

Primary citation

Bai, P.,Zhou, Q.,Wei, P.,Bai, H.,Chan, S.K.,Kappler, J.W.,Marrack, P.,Yin, L.
Rational discovery of a cancer neoepitope harboring the KRAS G12D driver mutation.
Sci China Life Sci, 2021

PubMed Abstract: Cytotoxic T cells targeting cancer neoantigens harboring driver mutations can lead to durable tumor regression in an HLAI-dependent manner. However, it is difficult to extend the population of patients who are eligible for neoantigen-based immunotherapy, as immunogenic neoantigen-HLA pairs are rarely shared across different patients. Thus, a way to find other human leukocyte antigen (HLA) alleles that can also present a clinically effective neoantigen is needed. Recently, neoantigen-based immunotherapy targeting the KRAS G12D mutation in patients with HLA-C*08:02 has shown effectiveness. In a proof-of-concept study, we proposed a combinatorial strategy (the combination of phylogenetic and structural analyses) to find potential HLA alleles that could also present KRAS G12D neoantigen. Compared to in silico binding prediction, this strategy avoids the uneven accuracy across different HLA alleles. Our findings extend the population of patients who are potentially eligible for immunotherapy targeting the KRAS G12D mutation. Additionally, we provide an alternative way to predict neoantigen-HLA pairs, which maximizes the clinical usage of shared neoantigens.

PubMed: 33740187
DOI: 10.1007/s11427-020-1888-1

Experimental method

X-RAY DIFFRACTION (1.7 Å)