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. 2020 Aug 5;48(16):9372–9386. doi: 10.1093/nar/gkaa644

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© The Author(s) 2020. Published by Oxford University Press on behalf of Nucleic Acids Research.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 3. — The conformation of free GapR tetramer resembles that in the GapR/DNA complex. (A) Overlay of 2D ¹H–¹⁵N HSQC spectra of free GapR (blue) and with the addition of 10A DNA at DNA/protein ratios of 0.2 (gold), 0.6 (red) and 1.0 (green). (B) Overlay of 2D ¹H–¹³C HSQC spectra of free (blue) GapR and with the addition of 10A DNA at DNA/protein ratios of 0.2 (gold), 0.6 (red) and 1.0 (green). Inserted boxes show an enlargement (a) or 1D ¹H slices (b) of the signals from the methyl group of M38. (C) Comparison of experimental SAXS curve (black circle) of GapR/11AT complex and calculated scattering curve (red) based on the crystal structure 6CG8. (D, E) Comparison of experimental SAXS curve (black circle) of free GapR and the calculated scattering curve (red) based on the tetrameric GapR structure from 6CG8 (D) or the dimeric structure of free GapR (E).