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. 2021 Jan 15;11:1529. doi: 10.1038/s41598-020-80325-x

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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3D structure and sequence alignment of TMPRSS2 against the Trypsin. (a) The 3D structure of TMPRSS2 is colored in brown and the key residue in dark-green, the 3D structure of Trypsin is in hot pink color and its key residue in navy-blue. This figure has been produced by the UCSF Chimera 1.14-linux_x86_64 (https://www.cgl.ucsf.edu/chimera/download.html). (b) The pairwise alignment of NP_005647(TMPRSS2) with the 2AGE sequence of trypsin has been shown. The important matched residues have been put in rectangular (the catalytic triad in blue and important residue for binding in green). The missing residues in the PDB file have been shown by X and the double residues in one position put in parentheses.