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. 2013 Nov 15;27(22):2500–2511. doi: 10.1101/gad.229385.113

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© 2013 Sysoeva et al.; Published by Cold Spring Harbor Laboratory Press

This article is distributed exclusively by Cold Spring Harbor Laboratory Press for the first six months after the full-issue publication date (see http://genesdev.cshlp.org/site/misc/terms.xhtml). After six months, it is available under a Creative Commons License (Attribution-NonCommercial 3.0 Unported), as described at http://creativecommons.org/licenses/by-nc/3.0/.

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Figure 6. — Structural similarity in the arrangement of functional loops in diverse homomeric ATPases with different topologies. (A) The functional loops are shown for each ATPase in both the 3D models and the cartoon depicting structural folds. Loop L1 (embellished H2 insertion) of NtrC1 contains at its tip the “GAFTGA” motif for binding σ54. Structures used: 2GXA for E1 helicase and 3ICE for Rho factor (Enemark and Joshua-Tor 2006; Thomsen and Berger 2009) (B) A hypothetical model of an α helix (orange) interacting with the pore of NtrC1 through the T217 residues facing the central channel. See also Supplemental Figure S4.