Singlet oxygen inhibits ATPase and proton translocation activity of the thylakoid ATP synthase CF1CFo.
FEBS Lett
; 584(1): 147-52, 2010 Jan 04.
Article
em En
| MEDLINE
| ID: mdl-19925794
ABSTRACT
Singlet oxygen ((1)O(2)) produced in plants during photosynthesis has a strong damaging effect not only on both photosystems but also on the whole photosynthetic machinery. This is also applicable for the adenosine triphosphate (ATP) synthase. Here we describe the impact of (1)O(2) generated by the photosensitizer Rose Bengal on the ATP hydrolysis and ATP-driven proton translocation activity of CF1CFo. Both activities were reduced dramatically within 1min of exposure. Interestingly, it is shown that oxidized thylakoid ATP synthase is more susceptible to (1)O(2) than CF1CFo in its reduced state, a new insight on the mechanism of (1)O(2) interaction with the gamma subunit.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Prótons
/
Tilacoides
/
Oxigênio Singlete
/
ATPases de Cloroplastos Translocadoras de Prótons
Idioma:
En
Revista:
FEBS Lett
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Alemanha