PMID- 37751693 OWN - NLM STAT- MEDLINE DCOM- 20230928 LR - 20231005 IS - 2667-2375 (Electronic) IS - 2667-2375 (Linking) VI - 3 IP - 9 DP - 2023 Sep 25 TI - Hybrid structural modeling of alloantibody binding to human leukocyte antigen with rapid and reproducible cross-linking mass spectrometry. PG - 100569 LID - S2667-2375(23)00213-8 [pii] LID - 10.1016/j.crmeth.2023.100569 [doi] LID - 100569 AB - Alloantibody recognition of donor human leukocyte antigen (HLA) is associated with poor clinical transplantation outcomes. However, the molecular and structural basis for the alloantibody-HLA interaction is not well understood. Here, we used a hybrid structural modeling approach on a previously studied alloantibody-HLA interacting pair with inputs from ab initio, in silico, and in vitro data. Highly reproducible cross-linking mass spectrometry data were obtained with both discovery- and targeted mass spectrometry-based approaches approaches. The cross-link information was then used together with predicted antibody F(v) structure, predicted antibody paratope, and in silico-predicted interacting surface to model the antibody-HLA interaction. This hybrid structural modeling approach closely recapitulates the key interacting residues from a previously solved crystal structure of an alloantibody-HLA-A *11:01 pair. These results suggest that a predictive-based hybrid structural modeling approach supplemented with cross-linking mass spectrometry data can provide functionally relevant structural models to understand the structural basis of antibody-HLA mismatch in transplantation. CI - Copyright (c) 2023 The Author(s). Published by Elsevier Inc. All rights reserved. FAU - Ser, Zheng AU - Ser Z AD - Functional Proteomics Laboratory, SingMass National Laboratory, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A *STAR), Singapore 138673, Singapore. FAU - Gu, Yue AU - Gu Y AD - Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore 117545, Singapore; Immunology Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore 117545, Singapore. FAU - Yap, Jiawei AU - Yap J AD - Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore 117545, Singapore; Immunology Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore 117545, Singapore. FAU - Lim, Yan Ting AU - Lim YT AD - Functional Proteomics Laboratory, SingMass National Laboratory, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A *STAR), Singapore 138673, Singapore. FAU - Wang, Shi Mei AU - Wang SM AD - Functional Proteomics Laboratory, SingMass National Laboratory, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A *STAR), Singapore 138673, Singapore. FAU - Hamidinia, Maryam AU - Hamidinia M AD - Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore 117545, Singapore; Immunology Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore 117545, Singapore. FAU - Murali, Tanusya Murali AU - Murali TM AD - Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore 117545, Singapore; Immunology Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore 117545, Singapore. FAU - Kumar, Ragini AU - Kumar R AD - Functional Proteomics Laboratory, SingMass National Laboratory, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A *STAR), Singapore 138673, Singapore. FAU - Gascoigne, Nicholas Rj AU - Gascoigne NR AD - Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore 117545, Singapore; Immunology Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore 117545, Singapore. FAU - MacAry, Paul A AU - MacAry PA AD - Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore 117545, Singapore; Immunology Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore 117545, Singapore. FAU - Sobota, Radoslaw M AU - Sobota RM AD - Functional Proteomics Laboratory, SingMass National Laboratory, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A *STAR), Singapore 138673, Singapore. Electronic address: rmsobota@imcb.a-star.edu.sg. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20230830 PL - United States TA - Cell Rep Methods JT - Cell reports methods JID - 9918227360606676 RN - 0 (Histocompatibility Antigens) RN - 0 (HLA Antigens) RN - 0 (Histocompatibility Antigens Class II) RN - 0 (Isoantibodies) RN - 0 (Immunoglobulin Variable Region) SB - IM MH - Humans MH - *Histocompatibility Antigens MH - *HLA Antigens MH - Histocompatibility Antigens Class II MH - Isoantibodies MH - Immunoglobulin Variable Region MH - Mass Spectrometry PMC - PMC10545907 OTO - NOTNLM OT - CP: Immunology OT - HLA OT - antibody OT - cross-linking mass spectrometry OT - human leukocyte antigen OT - mass spectrometry OT - molecular docking OT - proteomics OT - structural biology OT - transplantation COIS- Declaration of interests The authors declare no competing interests. EDAT- 2023/09/27 00:42 MHDA- 2023/09/28 06:43 PMCR- 2023/08/30 CRDT- 2023/09/26 18:17 PHST- 2023/03/16 00:00 [received] PHST- 2023/06/05 00:00 [revised] PHST- 2023/08/07 00:00 [accepted] PHST- 2023/09/28 06:43 [medline] PHST- 2023/09/27 00:42 [pubmed] PHST- 2023/09/26 18:17 [entrez] PHST- 2023/08/30 00:00 [pmc-release] AID - S2667-2375(23)00213-8 [pii] AID - 100569 [pii] AID - 10.1016/j.crmeth.2023.100569 [doi] PST - ppublish SO - Cell Rep Methods. 2023 Sep 25;3(9):100569. doi: 10.1016/j.crmeth.2023.100569. Epub 2023 Aug 30.