Figure 2
Structural features of L. monocytogenes GTP cyclohydrolase I. (a) Close-up of the active site. Conserved amino acids are shown in stick representation. (b) Active-site composition; the view is along one C2 axis. Monomer 1 (blue) and monomer 2 (orange) belong to the `top' pentamer; monomer 3 (green) belongs to the `bottom' pentamer. Intense coloring indicates the active site (one of ten) formed by these monomers. (c) View along the C5 axis. Monomers of the `top' pentamer are shown in distinct colors and the `bottom' pentamer is in black and white. (d) Monomer architecture. H, helix; S, strand. These figures were prepared using PyMOL (DeLano, 2004). Corresponding color coding is used in (a) and (b); arbitrary color coding is used in (c) and (d). |