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Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Arch+Pharm+(Weinheim) 2021 ; 354 (11): e2100160 Nephropedia Template TP
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Binding of boswellic acids to functional proteins of the SARS-CoV-2 virus: Bioinformatic studies #MMPMID34427335
Caliebe RH; Scior T; Ammon HPT
Arch Pharm (Weinheim) 2021[Nov]; 354 (11): e2100160 PMID34427335show ga
Boswellic acids (BAs) have been shown to possess antiviral activity. Using bioinformatic methods, it was tested whether or not acetyl-11-keto-beta-boswellic acid (AKBA), 11-keto-beta-boswellic acid (KBA), beta-boswellic acid (BBA), and the phosphorylated active metabolite of Remdesivir(R) (RGS-P3) bind to functional proteins of SARS-CoV-2, that is, the replicase polyprotein P0DTD1, the spike glycoprotein P0DTC2, and the nucleoprotein P0DTC9. Using P0DTD1, AKBA and KBA showed micromolar binding affinity to the RNA-dependent RNA polymerase (RdRp) and to the main proteinase complex M(pro) . Phosphorylated BAs even bond in the nanomolar range. Due to their positive and negative charges, BAs and RGS-P3 bond to corresponding negative and positive areas of the protein. BAs and RGS-P3 docked in the tunnel-like cavity of RdRp. BAs also docked into the elongated surface rim of viral M(pro) . In both cases, binding occurred with active site amino acids in the lower micromolecular to upper nanomolar range. KBA, BBA, and RGS-P3 also bond to P0DTC2 and P0DTC9. The binding energies for BAs were in the range of -5.8 to -6.3 kcal/mol. RGS-P3 and BAs occluded the centrally located pore of the donut-like protein structure of P0DTC9 and, in the case of P0DTC2, RGS-P3 and BAs impacted the double-wing-like protein structure. The data of this bioinformatics study clearly show that BAs bind to three functional proteins of the SARS-CoV-2 virus responsible for adhesion and replication, as does RGS-P3, a drug on the market to treat this disease. The binding effectiveness of BAs can be increased through phosphate esterification. Whether or not BAs are druggable against the SARS-CoV-2 disease remains to be established.