Titre du document / Document title

Bioinformatic analysis of the genomes of the cyanobacteria Synechocystis sp. PCC 6803 and Synechococcus elongatus PCC 7942 for the presence of peroxiredoxins and their transcript regulation under stress

Auteur(s) / Author(s)

STORK Tina ⁽¹⁾ ; MICHEL Klaus-Peter ⁽²⁾ ; PISTORIUS Elfriede K. ⁽²⁾ ; DIETZ Karl-Josef ⁽¹⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Biochemistry and Physiology of Plants, Faculty of Biology, University of Bielefeld, Universitätsstrasse 25, 3615 Bielefeld, ALLEMAGNE
⁽²⁾ Molecular Cell Physiology, Faculty of Biology, University of Bielefeld, Universitätsstrasse 25, 33615 Bielefeld, ALLEMAGNE

Résumé / Abstract

The genomes of the cyanobacteria Synechocystis sp. PCC 6803 and Synechococcus elongatus PCC 7942 encode five and six open reading frames (ORFs), respectively, with similarity to peroxide-detoxifying peroxiredoxins (Prx). In addition to one highly conserved gene each for 2-Cys Prx and 1-Cys Prx, the Synechocystis sp. PCC 6803 genome contains one Typell Prx and two PrxQ-like ORFs, while Synechococcus elongatus PCC 7942 has four PrxQ-like ORFs. The transcript regulation of all these bioinformatically identified genes was analysed under selected stress conditions, i.e. light limitation and light stress, hydrogen peroxide, methylviologen, salinity, as well as nitrogen-and iron-deficiency. The results on specific time- and stress-dependent regulation of transcript amounts suggest conserved as well as variable functions of these putative Prx-s in antioxidant defence. The results are discussed in the context of evolution and physiological function, particularly in relation to photosynthesis.

Revue / Journal Title

Journal of experimental botany    ISSN  0022-0957   CODEN JEBOA6 

Source / Source

2005, vol. 56, n^o422, pp. 3193-3206 [14 page(s) (article)] (1 p.3/4)

Langue / Language

Anglais

Editeur / Publisher

Oxford University Press, Oxford, ROYAUME-UNI  (1950) (Revue)

Mots-clés anglais / English Keywords

Photosynthesis

;

Antioxidant

;

Salinity

;

Gene

;

Oxidative stress

;

Mots-clés français / French Keywords

Photosynthèse

;

Antioxydant

;

Salinité

;

Gène

;

Stress oxydatif

;

Mots-clés espagnols / Spanish Keywords

Fotosíntesis

;

Antioxidante

;

Salinidad

;

Gen

;

Estrés oxidativo

;

Mots-clés d'auteur / Author Keywords

Oxidative stress

;

peroxiredoxins

;

photosynthesis

;

Synechococcus elongatus PCC 7942

;

Synechocystis sp. PCC 6803

;

Localisation / Location

INIST-CNRS, Cote INIST : 6923, 35400013539706.0180