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10.3390/ijms21165807

http://scihub22266oqcxt.onion/10.3390/ijms21165807
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32823591!7461543!32823591
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suck abstract from ncbi


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pmid32823591      Int+J+Mol+Sci 2020 ; 21 (16): ä
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  • Nicotinic Cholinergic System and COVID-19: In Silico Identification of an Interaction between SARS-CoV-2 and Nicotinic Receptors with Potential Therapeutic Targeting Implications #MMPMID32823591
  • Farsalinos K; Eliopoulos E; Leonidas DD; Papadopoulos GE; Tzartos S; Poulas K
  • Int J Mol Sci 2020[Aug]; 21 (16): ä PMID32823591show ga
  • While SARS-CoV-2 uses angiotensin converting enzyme 2 (ACE2) as the receptor for cell entry, it is important to examine other potential interactions between the virus and other cell receptors. Based on the clinical observation of low prevalence of smoking among hospitalized COVID-19 patients, we examined and identified a "toxin-like" amino acid (aa) sequence in the Receptor Binding Domain of the Spike Glycoprotein of SARS-CoV-2 (aa 375-390), which is homologous to a sequence of the Neurotoxin homolog NL1, one of the many snake venom toxins that are known to interact with nicotinic acetylcholine receptors (nAChRs). We present the 3D structural location of this "toxin-like" sequence on the Spike Glycoprotein and the superposition of the modelled structure of the Neurotoxin homolog NL1 and the SARS-CoV-2 Spike Glycoprotein. We also performed computational molecular modelling and docking experiments using 3D structures of the SARS-CoV-2 Spike Glycoprotein and the extracellular domain of the nAChR alpha9 subunit. We identified a main interaction between the aa 381-386 of the SARS-CoV-2 Spike Glycoprotein and the aa 189-192 of the extracellular domain of the nAChR alpha9 subunit, a region which forms the core of the "toxin-binding site" of the nAChRs. The mode of interaction is very similar to the interaction between the alpha9 nAChR and alpha-bungarotoxin. A similar interaction was observed between the pentameric alpha7 AChR chimera and SARS-CoV-2 Spike Glycoprotein. The findings raise the possibility that SARS-CoV-2 may interact with nAChRs, supporting the hypothesis of dysregulation of the nicotinic cholinergic system being implicated in the pathophysiology of COVID-19. Nicotine and other nicotinic cholinergic agonists may protect nAChRs and thus have therapeutic value in COVID-19 patients.
  • |Amino Acid Sequence/genetics[MESH]
  • |Betacoronavirus/*metabolism[MESH]
  • |COVID-19[MESH]
  • |Computational Biology[MESH]
  • |Coronavirus Infections/physiopathology[MESH]
  • |Humans[MESH]
  • |Molecular Docking Simulation[MESH]
  • |Neurotoxins/genetics/metabolism[MESH]
  • |Pandemics[MESH]
  • |Pneumonia, Viral/physiopathology[MESH]
  • |Protein Structure, Tertiary/genetics[MESH]
  • |Receptors, Nicotinic/*genetics/*metabolism[MESH]
  • |SARS-CoV-2[MESH]
  • |Sequence Alignment[MESH]
  • |Snake Venoms/genetics[MESH]


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