Revista de Proteómica y Bioinformática
Acceso abierto

abstracto

Un enfoque bioinformático para la desactivación de la glicoproteína de pico COVID-19 por Modificación química de residuos de asparagina y lisina a través de vitamina B6 y Vitamina C

Homa Torabizadeh*

To invade human cells, COVID-19 uses its spike glycoprotein as the major surface protein. This glycoprotein can be inactivated through chemical modification of surface accessible asparagine and lysine residues by vitamin B6 (pyridoxal-5'-phosphate, PLP) and vitamin C (ascorbic acid). This reversible reaction leading to the formation of a Schiff base (aldimine), and consequent reduction by ascorbate lead to form a stable phosphopyridoxyl-lysyl or asparagyl covalent bonds. For this purpose, at first, the spike glycoprotein sequences in similar proteins with 100% identity was specified by using of UniProtKB that is located at the ExPASy server. All of these proteins have a 1,255 length and 139,125 Mass (Da) respectively. Then, GetArea software was used for accessible surface area determination of each sequence by employing of PDB files that is reserved at PDB website. The results revealed that, 51 out of 81 (for asparagine) and 22 out of 48 (for lysine) are accessible for PLP reaction. Thus, terminal amino groups (NH₂) of asparagine and lysine can react with PLP and produce Schiff base bond an then it can be converts to a strong covalent bond by ascorbic acid reduction. In this way, attachment and fusion process can be prevented. This may be a way for vaccine and drug preparation.