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. 2018 Jan 8;9:97. doi: 10.1038/s41467-017-02570-5

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 6 — Proposed mechanism of RNA degradation by Cg-mtEXO. The cycle of ATP binding, hydrolysis and ADP release (black arrows) induces conformational changes of Suv3 helicase (blue arrows). The RecA2 domain (purple) would move toward the RecA1 domain (cyan) and away from it (blue arrows), while Suv3-Dss1 contacts would be maintained. The movements of RecA domains lead to the translocation of the 3′ end of the RNA (orange) into the RNA-binding channel and toward the active site of Dss1 nuclease (blue)