A Complex containing PGRL1 and PGR5 is involved in the switch between linear and cyclic electron flow in Arabidopsis
Articolo
Data di Pubblicazione:
2008
Citazione:
A Complex containing PGRL1 and PGR5 is involved in the switch between linear and cyclic electron flow in Arabidopsis / G. Dal Corso, P. Pesaresi, S. Masiero, E. Aseeva, D. Schunemann, G. Finazzi, P. Joliot, R. Barbato, D. Leister. - In: CELL. - ISSN 0092-8674. - 132:2(2008 Jan 25), pp. 273-285.
Abstract:
During photosynthesis, two photoreaction centers
located in the thylakoid membranes of the chloroplast,
photosystems I and II (PSI and PSII), use light
energy to mobilize electrons to generate ATP and
NADPH. Different modes of electron flow exist, of
which the linear electron flow is driven by PSI and
PSII, generating ATP and NADPH, whereas the cyclic
electron flow (CEF) only generates ATP and is driven
by the PSI alone. Different environmental and metabolic
conditions require the adjustment of ATP/
NADPH ratios and a switch of electron distribution
between the two photosystems. With the exception
of PGR5, other components facilitating CEF are unknown.
Here, we report the identification of PGRL1,
a transmembrane protein present in thylakoids
of Arabidopsis thaliana. Plants lacking PGRL1 show
perturbation of CEF, similar to PGR5-deficient plants.
We find that PGRL1 and PGR5 interact physically
and associate with PSI. We therefore propose
that the PGRL1-PGR5 complex facilitates CEF in
eukaryotes.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
CELLBIO; PROTEINS; SIGNALING
Elenco autori:
G. Dal Corso, P. Pesaresi, S. Masiero, E. Aseeva, D. Schunemann, G. Finazzi, P. Joliot, R. Barbato, D. Leister
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