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. 2019 Oct 17;9:356. doi: 10.3389/fcimb.2019.00356

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Copyright © 2019 Chen, Rathod, Chiu, Chen, Tsai and Huang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Amino acid sequence alignment of C. difficile–encoded Lrp with other members of the Lrp/AsnC family. C. difficile Lrp amino acid sequences shared on average about 40% identity with the other Lrp sequences. The residues predicted to encode the DNA-binding HTH motif are identified. Secondary structural elements are indicated by barrels (α-helix) and arrows (β-sheet). Conserved lysin and arginine residues within the HTH domain are highlighted with a red star.