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. 2019 May 27;47(13):7094–7104. doi: 10.1093/nar/gkz470

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© The Author(s) 2019. Published by Oxford University Press on behalf of Nucleic Acids Research.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 3. — The crystal structure of Mycobacterium tuberculosis σ^H-RPo and σ^H/E-RPo. (A) The nucleic-acid scaffold used for the structure determination. (B) The schematic diagram of M. tuberculosis σ^H and interaction of the σ_3.2-like linker of σ^H (σ^H_3.2) with RNAP active-center cleft. (C) The schematic diagram of M. tuberculosis σ^H/E and interaction of σ^E_3.2 with RNAP active-center cleft. (D) The domain σ_3.2 of Ec σ^E, Ec σ⁷⁰, Mtb σ^E, Mtb σ^L, Mtb σ^H factors follow similar path to enter and exit RNAP active-center cleft.