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Structural adaptation of the plant protease Deg1 to repair photosystem II during light exposure

Kley, Juliane, Schmidt, Bastian, Boyanov, Boril, Stolt-Bergner, Peggy C., Kirk, Rebecca, Ehrmann, Michael, Knopf, Ronit R., Naveh, Leah, Adam, Zach and Clausen, Tim 2011. Structural adaptation of the plant protease Deg1 to repair photosystem II during light exposure. Nature Structural & Molecular Biology 18 (6) , pp. 728-731. 10.1038/nsmb.2055

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Abstract

Deg1 is a chloroplastic protease involved in maintaining the photosynthetic machinery. Structural and biochemical analyses reveal that the inactive Deg1 monomer is transformed into the proteolytically active hexamer at acidic pH. The change in pH is sensed by His244, which upon protonation, repositions a specific helix to trigger oligomerization. This system ensures selective activation of Deg1 during daylight, when acidification of the thylakoid lumen occurs and photosynthetic proteins are damaged.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Subjects: Q Science > QH Natural history
Publisher: Nature Publishing Group
ISSN: 1545-9993
Last Modified: 04 Jun 2017 06:10
URI: http://orca.cf.ac.uk/id/eprint/56932

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