An ancient function of PGR5 in iron delivery?

Leister, Dario; Marino, Giada; Minagawa, Jun und Dann, Marcel (2022): An ancient function of PGR5 in iron delivery? In: Trends in Plant Science, Bd. 27, Nr. 10: S. 971-980

Abstract

In all phototrophic organisms, the photosynthetic apparatus must be protected from light-induced damage. One important mechanism that mitigates photo -damage in plants is antimycin A (AA)-sensitive cyclic electron flow (CEF), the evo-lution of which remains largely obscure. Here we show that proton gradient regulation 5 (PGR5), a key protein involved in AA-sensitive CEF, displays intriguing commonalities - including sequence and structural features - with a group of ferritin-like proteins. We therefore propose that PGR5 may originally have been involved in prokaryotic iron mobilization and delivery, which facilitated a primordial type of CEF as a side effect. The abandonment of the bacterioferritin system during the transformation of cyanobacterial endosymbionts into chloroplasts might have allowed PGR5 to functionally specialize in CEF.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Biologie
• Themengebiete: 500 Naturwissenschaften und Mathematik > 570 Biowissenschaften; Biologie
• ISSN: 1360-1385
• Sprache: Englisch