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. 2005 Mar 31;24(8):1502–1511. doi: 10.1038/sj.emboj.7600634

Figure 1.

Figure 1

Oligomerization of the SeqA–N dimer. (A) Ribbon diagram of a single SeqA–N subunit. (B) A SeqA–N dimer. The two subunits are shown as yellow and green ribbon diagrams. (C) The asymmetric unit contains two SeqA–N dimers related by a noncrystallographic dyad axis and a 43 screw axis. The two SeqA–N dimers colored yellow–green and blue–red, respectively, are shown in a ribbons diagram (left) and molecular surface representation (right). (D) Two views of the SeqA–N filament. The black bar indicates a complete helical turn consisting of four dimers. The 43 axis and the noncrystallographic (gray arrows) and crystallographic (gray ovals) dyad axes are indicated. (E) Crystal packing of the SeqA filaments shown as a ribbon diagram. Filaments pack according to the crystallographic 31 axis. The central filament is shown with the SeqA monomers colored yellow and green. The top and bottom filaments are shown in light and dark gray, respectively.