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. 2019 Oct 30;10:2457. doi: 10.3389/fmicb.2019.02457

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Copyright © 2019 Wang, Jiang, Zhang, Cao, Zhang, Chen, Li, Wang, Zhang, Song and Li.

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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Distribution in bacteria (A) and phylogenetic analysis (B) of Chi23 and its homologs. (A) Distribution of Chi23 homologs in bacteria from marine and soil environments. All the Chi23 homologs are potential single-domain proteins. (B) A neighbor-joining tree of the GH18 subfamily B endochitinases. Bootstrap analysis of 1,000 replicates was conducted, and values above 50% are shown. Chitinases from the GH18 subfamily A were used as an outgroup. The crystal structures of Chi23 and MmChi60 are also shown.