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10.1016/j.csbj.2020.12.039

http://scihub22266oqcxt.onion/10.1016/j.csbj.2020.12.039
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33398234!7773544!33398234
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suck abstract from ncbi


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pmid33398234      Comput+Struct+Biotechnol+J 2021 ; 19 (ä): 518-529
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  • Computational design of SARS-CoV-2 spike glycoproteins to increase immunogenicity by T cell epitope engineering #MMPMID33398234
  • Ong E; Huang X; Pearce R; Zhang Y; He Y
  • Comput Struct Biotechnol J 2021[]; 19 (ä): 518-529 PMID33398234show ga
  • The development of effective and safe vaccines is the ultimate way to efficiently stop the ongoing COVID-19 pandemic, which is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Built on the fact that SARS-CoV-2 utilizes the association of its Spike (S) protein with the human angiotensin-converting enzyme 2 (ACE2) receptor to invade host cells, we computationally redesigned the S protein sequence to improve its immunogenicity and antigenicity. Toward this purpose, we extended an evolutionary protein design algorithm, EvoDesign, to create thousands of stable S protein variants that perturb the core protein sequence but keep the surface conformation and B cell epitopes. The T cell epitope content and similarity scores of the perturbed sequences were calculated and evaluated. Out of 22,914 designs with favorable stability energy, 301 candidates contained at least two pre-existing immunity-related epitopes and had promising immunogenic potential. The benchmark tests showed that, although the epitope restraints were not included in the scoring function of EvoDesign, the top S protein design successfully recovered 31 out of the 32 major histocompatibility complex (MHC)-II T cell promiscuous epitopes in the native S protein, where two epitopes were present in all seven human coronaviruses. Moreover, the newly designed S protein introduced nine new MHC-II T cell promiscuous epitopes that do not exist in the wildtype SARS-CoV-2. These results demonstrated a new and effective avenue to enhance a target protein's immunogenicity using rational protein design, which could be applied for new vaccine design against COVID-19 and other pathogens.
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