Table 4.

Possible binding sites of NSP7-NSP8 against known anti-viral drugs

Drugs		Total binding sites			(7JLT) NSP7-NSP8 of COVID-19
Amprenavir	Known similar target molecule				Protease, HIV-1
	Binding properties	2	1	Superposition type	L
				RMSD	1.09 Å
				Amino acid targets of drug	184 LEU 130 VAL 132 ILE
				No. of residues in known binding	18
				Human similar targets	5
			2	Superposition type	R
				RMSD	1.07 Å
				Amino acid targets of drug	13 LEU 11 VAL 16 VAL 12 VAL
				No. of residues in known binding	18
				Human similar targets	5
Darunavir	Known similar target molecule				Protease, HIV-1
	Binding properties	1	1	Superposition type	R
				RMSD	0.99 Å
				Amino acid targets of drug	13 LEU 11 VAL 16 VAL
				No. of residues in known binding	20
				Human similar targets	6
Nelfinavir	Known similar target molecule				Protease, HIV-1
	Binding properties	1	1	Superposition type	R
				RMSD	0.92 Å
				Amino acid targets of drug	77 ASP 78 ASN 93 THR
				No. of residues in known binding	30
				Human similar targets	10
Rimantadine	Known similar target molecule				M2 protein, Influeza A
	Binding properties	1	1	Superposition type	L
				RMSD	0.96 Å
				Amino acid targets of drug	83 VAL 86 ALA 85 SER
				No. of residues in known binding	10
				Human similar targets	0
Saquinavir	Known similar target molecule				Protease, HIV-1
	Binding properties	1	1	Superposition type	R
				RMSD	0.97 Å
				Amino acid targets of drug	160 VAL 183 PRO 185 ILE
				No. of residues in known binding	31
				Human similar targets	5

Features of different drug binding motifs. HIV-1 Human Immunodeficiency virus 1, RMSD Root Mean Square Deviation, Å angstrom, ILE isoleucine, GLY glycine, VAL valine, LEU leucine, PRO proline, ASP aspartic acid