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. Author manuscript; available in PMC: 2013 Dec 27.
Published in final edited form as: Nature. 2013 Jun 5;498(7455):521–525. doi: 10.1038/nature12283

Figure 1. NMR structure of the p7(5a) hexamer and its comparison to the EM map.

Figure 1

Figure 1

a, Ensemble of 15 low-energy structures calculated using NMR restraints summarized in Supplementary Table 1. b, Two-dimensional drawing illustrating the intermonomer interactions among the H1, H2, and H3 helical segments that are responsible for the hexameric assembly. c, Three-dimensional cartoon representation describing the global arrangement of helical segments and amino acids that appear to play a role in the packing of H3 against H1 and H2. d, Fitting the lowest energy structure from the ensemble to the 16 Å EM map (EM database ID:1661)4. The fitting correlation is 0.94 as calculated with the program Chimera.