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Figure 4.
Figure 4. (a) Superposition of DNA intercalation sites for
four Sso7d/Sac7d-DNA complexes: Sso7d-GCGATCGC, Sso7d-GTGATCGC,
Sso7d-GTAATTAC and Sac7d-GTAATTAC. The models are fitted by the
common backbone atoms of protein. (b) The schematic diagram of
the DNA backbone conformation in Sso7d-GTGATCGC. The sugars
around the intercalation site adopt C3'-endo (N-type) pucker,
similar to A-DNA conformation. The right panel shows the
intercalation site of DNA, fitted to A-DNA using base-pair atoms.
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