Figure 3 - full size

Figure 3.
FIGURE 3. Stereo views of the superpositions of GTP bound to pig GTP-specific SCS (black) with ADP bound to E. coli SCS (gray) (Protein Data Bank (43) identifier 1cqi (7)) (A), GDP bound to pig GTP-specific SCS (gray) (B), and ATP bound to glycinamide ribonucleotide transformylase (gray) (PDB identifier 1kj8) (54) (C). The superpositions were based on structurally similar residues and performed using the program O (51) with a cutoff of 3.8 Å. Possible hydrogen-bonding interactions and ionic interactions between GTP and the pig GTP-specific SCS are represented by black dashed lines.