Catalytic Intermediate Crystal Structures of Cysteine Desulfurase from the Archaeon Thermococcus onnurineus NA1

Figure 6

Dihedral angles of ToCDS protomers in crystals I, II, III, and IV. (a) Averaged dihedral angle of each catalytic state. Positive dihedral angles are for the internal aldimine. Negative dihedral angles are for the external aldimine. (b) Superimposed structures of ToCDS NAT (cyan), GD (purple), and IAA (yellow). Structures were superimposed based on the position of the PLP pyridine ring.

(a)

(b)