PMID- 26364917 OWN - NLM STAT- MEDLINE DCOM- 20170710 LR - 20181113 IS - 2042-0226 (Electronic) IS - 1672-7681 (Print) IS - 1672-7681 (Linking) VI - 14 IP - 3 DP - 2017 Mar TI - Screening and identification of mimotopes of the major shrimp allergen tropomyosin using one-bead-one-compound peptide libraries. PG - 308-318 LID - 10.1038/cmi.2015.83 [doi] AB - The one-bead-one-compound (OBOC) combinatorial peptide library is a powerful tool to identify ligand and receptor interactions. Here, we applied the OBOC library technology to identify mimotopes specific to the immunoglobulin E (IgE) epitopes of the major shellfish allergen tropomyosin. OBOC peptide libraries with 8-12 amino acid residues were screened with serum samples from patients with shellfish allergy for IgE mimotopes of tropomyosin. Twenty-five mimotopes were identified from the screening and their binding reactivity to tropomyosin-specific IgE was confirmed by peptide ELISA. These mimotopes could be divided into seven clusters based on sequence homology, and epitope mapping by EpiSearch of the clustered mimotopes was performed to characterize and confirm the validity of mimotopes. Five out of six of the predicted epitopes were found to overlap with previously identified epitopes of tropomyosin. To further confirm the mimicry potential of mimotopes, BALB/c mice were immunized with mimotopes conjugated to keyhole limpet hemocyanin and assayed for their capacity to induce tropomyosin-specific antibodies. BALB/c mice that received mimotope immunization were found to have an elevated level of tropomyosin-specific immunoglobulin G, but not mice that received an irrelevant mimotope. This study pioneers the successful application of the OBOC libraries using whole sera to screen and identify multiple shrimp allergen mimotopes and validates their mimicry potential using in vitro, in vivo, and in silico methods.Cellular & Molecular Immunology advance online publication, 14 september 2015; doi:10.1038/cmi.2015.83. FAU - Leung, Nicki Yh AU - Leung NY AD - School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China. FAU - Wai, Christine Yy AU - Wai CY AD - School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China. FAU - Ho, Marco Hk AU - Ho MH AD - Department of Pediatrics and Adolescent Medicine, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong SAR, China. FAU - Liu, Ruiwu AU - Liu R AD - Department of Biochemistry and Molecular Medicine, University of California, Davis, CA 95616, USA. FAU - Lam, Kit S AU - Lam KS AD - Department of Biochemistry and Molecular Medicine, University of California, Davis, CA 95616, USA. FAU - Wang, Jin Jun AU - Wang JJ AD - Division of Rheumatology/Allergy, School of Medicine, University of California, Davis, CA 95616, USA. FAU - Shu, Shang An AU - Shu SA AD - Division of Rheumatology/Allergy, School of Medicine, University of California, Davis, CA 95616, USA. FAU - Chu, Ka Hou AU - Chu KH AD - School of Life Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong SAR, China. FAU - Leung, Patrick Sc AU - Leung PS AD - Division of Rheumatology/Allergy, School of Medicine, University of California, Davis, CA 95616, USA. LA - eng GR - P30 CA093373/CA/NCI NIH HHS/United States PT - Journal Article DEP - 20150914 PL - China TA - Cell Mol Immunol JT - Cellular & molecular immunology JID - 101242872 RN - 0 (Allergens) RN - 0 (Epitopes) RN - 0 (Immunoglobulin G) RN - 0 (Peptide Library) RN - 0 (Peptides) RN - 0 (Tropomyosin) RN - 37341-29-0 (Immunoglobulin E) SB - IM CIN - Cell Mol Immunol. 2019 May;16(5):522. PMID: 30374146 MH - Allergens/*immunology MH - Amino Acid Sequence MH - Animals MH - Combinatorial Chemistry Techniques MH - Enzyme-Linked Immunosorbent Assay MH - Epitope Mapping MH - Epitopes/chemistry/*immunology MH - Humans MH - Immunization MH - Immunoglobulin E/immunology MH - Immunoglobulin G/immunology MH - *Mass Screening MH - Mice, Inbred BALB C MH - *Microspheres MH - Models, Molecular MH - Penaeidae/*immunology MH - *Peptide Library MH - Peptides/immunology MH - Structural Homology, Protein MH - Tropomyosin/*immunology PMC - PMC5360880 EDAT- 2015/09/15 06:00 MHDA- 2017/07/14 06:00 PMCR- 2018/03/01 CRDT- 2015/09/15 06:00 PHST- 2015/05/22 00:00 [received] PHST- 2015/08/06 00:00 [revised] PHST- 2015/08/06 00:00 [accepted] PHST- 2015/09/15 06:00 [pubmed] PHST- 2017/07/14 06:00 [medline] PHST- 2015/09/15 06:00 [entrez] PHST- 2018/03/01 00:00 [pmc-release] AID - cmi201583 [pii] AID - 10.1038/cmi.2015.83 [doi] PST - ppublish SO - Cell Mol Immunol. 2017 Mar;14(3):308-318. doi: 10.1038/cmi.2015.83. Epub 2015 Sep 14.