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Figure 1.
Figure 1: Structure of the presynaptic nucleoprotein filament.
a, Structure of the RecA[6]–(ADP-AlF[4]-Mg)[6]–(dT)[18]
complex. The six RecA protomers are numbered from the N-terminal
RecA of the fusion protein and are coloured pink, brown, green,
cyan, purple and magenta, respectively. Only 15 of the 18
nucleotides are ordered (red). The DNA backbone is traced by a
red coil. The six ADP-AlF[4]-Mg molecules are coloured gold. The
five individual rotation/translation axes that relate adjacent
RecA protomers are shown as grey vertical lines. b, The L1 and
L2 loop regions and the  F
and G
helices that bind to ssDNA are coloured and numbered as in a,
with the rest of each RecA structure omitted for clarity. The
ssDNA is numbered starting with the 5'-most nucleotide in each
nucleotide triplet. The 5'-most and 3'-most nucleotide triplets
have only two and one ordered nucleotides, respectively.
Portions of the L1 and L2 loops of the C-terminal RecA are
disordered (dashed lines).
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