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Figure 1.
Fig. 1. The three-dimensional structure of (A)
endopolygalacturonase I and (B) endopolygalacturonase II with
the N- and C-termini indicated, viewed onto β-sheet PB2a
(yellow). PB2b (blue) is the bottom β-sheet. PB1 is shown in
green and PB3 is shown in red. The active site (Asp186, Asp207
and Asp208) is visible at the top, between the T1 loop regions
(on the right side) and the T3 loop regions (on the left side).
The glycosylation of endopolygalacturonase I and the loops
bordering the active site cleft are shown in ball-and-stick
representation (endopolygalacturonase I residues 124–128
(left) and 299–301 (right), endopolygalacturonase II residues
121–123 (left) and 293–295 (right)). The smallest distance
at the entry of the active site cleft is indicated with a dashed
line and the value is shown [34]. (For interpretation of the
references to color in this figure legend, the reader is
referred to the web version of this article.)
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