tetano
Editor, Senior Moderator
J Biomol Struct Dyn
. 2020 Dec 9;1-19.
doi: 10.1080/07391102.2020.1851303. Online ahead of print.
Sensing the interactions between carbohydrate-binding agents and N-linked glycans of SARS-CoV-2 spike glycoprotein using molecular docking and simulation studies
Kiran Bharat Lokhande[SUP] 1 [/SUP], Girish R Apte[SUP] 2 [/SUP], Ashish Shrivastava[SUP] 3 [/SUP], Ashutosh Singh[SUP] 3 [/SUP], Jayanta K Pal[SUP] 2 [/SUP], K Venkateswara Swamy[SUP] 1 [/SUP], Rajesh Kumar Gupta[SUP] 2 [/SUP]
Affiliations
Abstract
A recent surge in finding new candidate vaccines and potential antivirals to tackle atypical pneumonia triggered by the novel severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) needs new and unexplored approaches in solving this global pandemic. The homotrimeric transmembrane spike (S) glycoprotein of coronaviruses which facilitates virus entry into the host cells is covered with N-linked glycans having oligomannose and complex sugars. These glycans provide a unique opportunity for their targeting via carbohydrate-binding agents (CBAs) which have shown their antiviral potential against coronaviruses and enveloped viruses. However, CBA-ligand interaction is not fully explored in developing novel carbohydrate-binding-based antivirals due to associated unfavorable responses with CBAs. CBAs possess unique carbohydrate-binding specificity, therefore, CBAs like mannose-specific plant lectins/lectin-like mimic Pradimicin-A (PRM-A) can be used for targeting N-linked glycans of S glycoproteins. Here, we report studies on the binding and stability of lectins (NPA, UDA, GRFT, CV-N and wild-type and mutant BanLec) and PRM-A with the S glycoprotein glycans via docking and MD simulation. MM/GBSA calculations were also performed for docked complexes. Interestingly, stable BanLec mutant (H84T) also showed similar docking affinity and interactions as compared to wild-type BanLec, thus, confirming that uncoupling the mitogenic activity did not alter the lectin binding activity of BanLec. The stability of the docked complexes, i.e. PRM-A and lectins with SARS-CoV-2 S glycoprotein showed favorable intermolecular hydrogen-bond formation during the 100 ns MD simulation. Taking these together, our predicted in silico results will be helpful in the design and development of novel CBA-based antivirals for the SARS-CoV-2 neutralization. Communicated by Ramaswamy H. Sarma.
Keywords: Lectin; Pradimicin-A; SARS-CoV-2; molecular docking and MD simulation; spike glycoprotein.
. 2020 Dec 9;1-19.
doi: 10.1080/07391102.2020.1851303. Online ahead of print.
Sensing the interactions between carbohydrate-binding agents and N-linked glycans of SARS-CoV-2 spike glycoprotein using molecular docking and simulation studies
Kiran Bharat Lokhande[SUP] 1 [/SUP], Girish R Apte[SUP] 2 [/SUP], Ashish Shrivastava[SUP] 3 [/SUP], Ashutosh Singh[SUP] 3 [/SUP], Jayanta K Pal[SUP] 2 [/SUP], K Venkateswara Swamy[SUP] 1 [/SUP], Rajesh Kumar Gupta[SUP] 2 [/SUP]
Affiliations
- PMID: 33292056
- DOI: 10.1080/07391102.2020.1851303
Abstract
A recent surge in finding new candidate vaccines and potential antivirals to tackle atypical pneumonia triggered by the novel severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) needs new and unexplored approaches in solving this global pandemic. The homotrimeric transmembrane spike (S) glycoprotein of coronaviruses which facilitates virus entry into the host cells is covered with N-linked glycans having oligomannose and complex sugars. These glycans provide a unique opportunity for their targeting via carbohydrate-binding agents (CBAs) which have shown their antiviral potential against coronaviruses and enveloped viruses. However, CBA-ligand interaction is not fully explored in developing novel carbohydrate-binding-based antivirals due to associated unfavorable responses with CBAs. CBAs possess unique carbohydrate-binding specificity, therefore, CBAs like mannose-specific plant lectins/lectin-like mimic Pradimicin-A (PRM-A) can be used for targeting N-linked glycans of S glycoproteins. Here, we report studies on the binding and stability of lectins (NPA, UDA, GRFT, CV-N and wild-type and mutant BanLec) and PRM-A with the S glycoprotein glycans via docking and MD simulation. MM/GBSA calculations were also performed for docked complexes. Interestingly, stable BanLec mutant (H84T) also showed similar docking affinity and interactions as compared to wild-type BanLec, thus, confirming that uncoupling the mitogenic activity did not alter the lectin binding activity of BanLec. The stability of the docked complexes, i.e. PRM-A and lectins with SARS-CoV-2 S glycoprotein showed favorable intermolecular hydrogen-bond formation during the 100 ns MD simulation. Taking these together, our predicted in silico results will be helpful in the design and development of novel CBA-based antivirals for the SARS-CoV-2 neutralization. Communicated by Ramaswamy H. Sarma.
Keywords: Lectin; Pradimicin-A; SARS-CoV-2; molecular docking and MD simulation; spike glycoprotein.