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Figure 4
Views of the active-site residues of FAE-III: Ser133, Asp194 and His247. Electron density is shown at 1σ in cyan and 3σ in purple. (a) The native enzyme with an active catalytic triad. (b) The FAE-III–ferulic acid complex as seen in molecule A. His247 has changed position, leaving an inactive triad. (c) Molecule B of the FAE-III–ferulic acid complex. His247 is seen in both the active and inactive conformations. (b) and (c) also show the two conformations of the catalytic Ser133 residue.

Journal logoBIOLOGICAL
CRYSTALLOGRAPHY
ISSN: 1399-0047
Volume 60| Part 5| April 2004| Pages 878-887
doi:10.1107/S0907444904004937
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