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. 2021 Mar 25;12:625808. doi: 10.3389/fimmu.2021.625808

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Copyright © 2021 Xie, Chen, Chen, Jiang, Wang, Li, Sun and Liu

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The crystal structure of VSIG3 protein. (A) Coomassie blue staining results of E. coli expressed VSIG3 protein. (1: before IPTG induction; 2: after IPTG induction; 3: supernatant after lysis; 4: inclusion bodies). (B) The VSIG3 protein was eluted with different concentrations of imidazole solutions (20 mM, 50 mM, 250 mM). FT: Flow through solutions. (C) Purification of refolded VSIG3 protein by size exclusion chromatography on Superdex 75. (D) Overview of the human VSIG3-ECD protein crystal structure as a dimer. Protein monomers interact with each other by hydrogen bonding. Chain A (green), chain B (cyan). (E) Detail of the structure of VSIG3-ECD protein. Sequence of human VSIG3-ECD with labeled secondary structure. Cartoon structure of human VSIG3-ECD with labeled secondary structure.