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. 2008 Sep 16;36(18):5882–5895. doi: 10.1093/nar/gkn587

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© 2008 The Author(s)

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 1. — Reverse gyrase and its helicase-like domain. (A) Full-length reverse gyrase, consists of an N-terminal helicase-like domain [H1, light blue, H2, cyan, H3 (latch), blue] and a C-terminal topoisomerase domain (orange). The helicase-like domain construct comprises the helicase-like domain (H1 and H2), and the latch-domain H3 that is inserted into H2. The positions of K106 in the Walker A motif and of the catalytic tyrosine, Y851 (black), and the putative zinc fingers (gray) are indicated. (B) Structure of A. fulgidus reverse gyrase [PDB-ID 1GKU, Ref. (10)], color-coded as in (A). The regions carrying the putative zinc fingers are missing in the electron density.