Introduction of SNAPG

SNAPG protein structure obtained from Danio rerio organism comprises of 4 identical molecular chains (Chain A, B, C and D) interacting to one another via non-bonded contacts. Each chain is 307 amino acid residues in length and made of 69% helical secondary structure of 16 helices, 34 helix-helix interaction, 8 beta turns and 2 gamma turns[1]. Two types of molecular component were observed to formed interactions with SNAPG molecule. These molecular components were sulfanate ion(SO4) and selenomethionine (MSE)(Figure 1). The sulfanate ions interact differently to different residues of different chain, unlike MSE in which included into SNAPG amino acid sequences as modified residue (Figure 1.B,C & 2).

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