Abstract
Class-I restricted T cell-associated molecule (CRTAM) is a member of the immunoglobulin superfamily, and it is closely related to nectin-like protein. CRTAM is expressed in activated CD8 T cells, NKT cells, NK cells and in a subpopulation CD4 T cells. In this study, we produce as recombinant proteins, the Ig-domains of CRTAM (IgV–IgC), the IgV, and the IgC. These proteins were successfully purified in the soluble fraction only if the stalk region was included. The recombinant CRTAM recognizes its ligand nectin-like 2 in a cell-free system. We also demonstrate that the IgC domain of CRTAM is recognized by the anti-hCRTAM monoclonal antibody C8 with a 0.62 nM affinity. In conclusion, the stalk region of CRTAM provides solubility for the expression of its Ig-domains as recombinant proteins.
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Funding
The present work was supported by Cinvestav Grant to Vianney Ortiz Navarrete. Barragan-Galvez Juan Carlos is a doctoral student from the Programa de Doctorado en Ciencias Biomedicas, Universidad Nacional Autónoma de México (UNAM) and was supported by Consejo Nacional de Ciencia y Tecnología (CONACYT) scholarship 489981. The funding agencies had no role in study design, data collection and analysis, preparation of the manuscript or the decision to publish.
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Barragan-Galvez, J.C., Gonzalez-Orozco, M., Hernandez-Flores, A. et al. Prokaryotic Expression of the Immunoglobulin’s Domains of CRTAM to Characterize a Monoclonal Antibody. Protein J 39, 224–231 (2020). https://doi.org/10.1007/s10930-020-09896-y
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DOI: https://doi.org/10.1007/s10930-020-09896-y