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Open AccessArticle

Crystal Structure of Chaperonin GroEL from Xanthomonas oryzae pv. oryzae

Department of Biological Sciences, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
Genomics Division, National Institute of Agricultural Sciences, Rural Development Administration (RDA), Jeonju 03016, Korea
Department of Biotechnology, Sangmyung University, 20 Hongji-dong 2-gil, Jongno-gu, Seoul 03016, Korea
Author to whom correspondence should be addressed.
These authors contributed equally to this paper.
Crystals 2019, 9(8), 399;
Received: 16 July 2019 / Revised: 28 July 2019 / Accepted: 28 July 2019 / Published: 2 August 2019
(This article belongs to the Special Issue Crystallographic Studies of Enzymes)
PDF [2043 KB, uploaded 20 August 2019]


Xanthomonas oryzae pv. oryzae (Xoo) is a plant pathogen that causes bacterial blight of rice, with outbreaks occurring in most rice-growing countries. Thus far, there is no effective pesticide against bacterial blight. Chaperones in bacterial pathogens are important for the stabilization and delivery of effectors into host cells to cause disease. In bacteria, GroEL/GroES complex mediates protein folding and protects proteins against misfolding and aggregation caused by environmental stress. We determined the crystal structure of GroEL from Xanthomonas oryzae pv. oryzae (XoGroEL) at 3.2 Å resolution, which showed the open form of two conserved homoheptameric rings stacked back-to-back. In the open form structure, the apical domain of XoGroEL had a higher B factor than the intermediate and equatorial domains, indicating that the apical domain had a flexible conformation before the binding of substrate unfolded protein and ATP. The XoGroEL structure will be helpful in understanding the function and catalytic mechanism of bacterial chaperonin GroELs. View Full-Text
Keywords: GroEL; chaperonin; Xanthomonas oryzae pv. oryzae (Xoo); protein crystallography GroEL; chaperonin; Xanthomonas oryzae pv. oryzae (Xoo); protein crystallography

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Tran, H.-T.; Lee, J.; Park, H.; Kim, J.-G.; Kim, S.; Ahn, Y.-J.; Kang, L.-W. Crystal Structure of Chaperonin GroEL from Xanthomonas oryzae pv. oryzae. Crystals 2019, 9, 399.

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