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. 2021 Mar 2;11:4951. doi: 10.1038/s41598-021-84329-z

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© The Author(s) 2021

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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Encapsulin structure and cargo loading. (A) Electrostatic surface representation of a T. maritima T1 encapsulin protomer (PDB ID: 3DKT) in complex with its native targeting peptide viewed from the interior side of the assembled shell. The inset shows the targeting peptide binding pocket. (B) Cut-away views of T1 (T. maritima) and T3 (M. xanthus, PDB ID: 4PT2) encapsulins viewed along the fivefold symmetry axis. A single T1 protomer (electrostatic surface) and five targeting peptides (orange) are highlighted. The protomers forming a pentameric facet in the viewing direction are shown in green.