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. 2021 Feb 25;13:34. doi: 10.1186/s13073-021-00850-w

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© The Author(s) 2021

Open AccessThis 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/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 3 — Structure and conservation of COPB1 protein, and structural effect of missense variants. a Simple schematic diagram of COPB1 (β-COP) structure showing two main structural domains; trunk domain and appendage domain, and relative location of the c.957+1G>T and p.Phe551Val variants located towards the N terminal of the trunk domain. b COPB1 (β-COP) structure with the location of the 12 amino acids (in red) which are deleted due to exon 8 skipping caused by c957+1G>T. c COPB1 (β-COP) structure in context of COPI complex. Note exon 8 (red) makes up an important link between the scaffold and adaptor subcomplexes. d Alignment of COPB1 amino acid sequence from H. sapiens to yeast showing very high conservation of Phe551 across all species tested. e 3D structural modelling of COPB1 in complex with COPB2 and COPG1 showing the location of Phe551 near the site of interaction with COPG1. f Higher resolution image showing the location of Phe551Val mutation in a turn in the trunk domain