Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 7-Day Trial for You or Your Team.

Learn More →

Inactivation of the extrinsic subunit of photosystem II, PsbU, in Synechococcus PCC 7942 results in elevated resistance to oxidative stress

Inactivation of the extrinsic subunit of photosystem II, PsbU, in Synechococcus PCC 7942 results... PsbU is a subunit of the extrinsic complex attached to the core of photosystem II. A PsbU‐mutant of Synechococcus PCC 7942 was isolated based on its elevated resistance to externally applied oxidative stress. PsbU‐mutant exhibits fast rates of degradation of the photosystem II core protein, D1, under sub‐saturating as well as high‐light conditions. While forward electron transfer is not affected, back electron flow is severely impaired in the mutant. We suggest that impairment of psbU results in production of reactive‐oxygen‐species, which trigger antioxidative mechanisms even under standard growth conditions. Accordingly, when challenged with external oxidative stress, these cells are more resistant than wild type cells. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png FEBS Letters Wiley

Inactivation of the extrinsic subunit of photosystem II, PsbU, in Synechococcus PCC 7942 results in elevated resistance to oxidative stress

Download PDF
6 pages

Loading next page...
 
/lp/wiley/inactivation-of-the-extrinsic-subunit-of-photosystem-ii-psbu-in-dCRntm4cD4

References (49)

Publisher
Wiley
Copyright
© 2015 Federation of European Biochemical Societies
eISSN
1873-3468
DOI
10.1016/j.febslet.2006.03.020
Publisher site
See Article on Publisher Site

Abstract

PsbU is a subunit of the extrinsic complex attached to the core of photosystem II. A PsbU‐mutant of Synechococcus PCC 7942 was isolated based on its elevated resistance to externally applied oxidative stress. PsbU‐mutant exhibits fast rates of degradation of the photosystem II core protein, D1, under sub‐saturating as well as high‐light conditions. While forward electron transfer is not affected, back electron flow is severely impaired in the mutant. We suggest that impairment of psbU results in production of reactive‐oxygen‐species, which trigger antioxidative mechanisms even under standard growth conditions. Accordingly, when challenged with external oxidative stress, these cells are more resistant than wild type cells.

Journal

FEBS Letters – Wiley

Published: Apr 3, 2006

Keywords: ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;

There are no references for this article.