We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
The stress-induced SCP/HLIP family of small light-harvesting-like proteins (ScpABCDE) protects Photosystem II from photoinhibitory damages in the cyanobacterium Synechocystis sp. PCC 6803.
- Authors
Tibiletti, Tania; Rehman, Ateeq Ur; Vass, Imre; Funk, Christiane
- Abstract
Small CAB-like proteins (SCPs) are single-helix light-harvesting-like proteins found in all organisms performing oxygenic photosynthesis. We investigated the effect of growth in moderate salt stress on these stress-induced proteins in the cyanobacterium Synechocystis sp. PCC 6803 depleted of Photosystem I (PSI), which expresses SCPs constitutively, and compared these cells with a PSI-less/ScpABCDE mutant. SCPs, by stabilizing chlorophyll-binding proteins and Photosystem II (PSII) assembly, protect PSII from photoinhibitory damages, and in their absence electrons accumulate and will lead to ROS formation. The presence of 0.2 M NaCl in the growth medium increased the respiratory activity and other PSII electron sinks in the PSI-less/ScpABCDE strain. We postulate that this salt-induced effect consumes the excess of PSII-generated electrons, reduces the pressure of the electron transport chain, and thereby prevents O production.
- Subjects
LIGHT-harvesting complex (Photosynthesis); PHOTOSYSTEMS; SYNECHOCYSTIS; EFFECT of light on cyanobacteria; PLANT photoinhibition; ELECTRON transport
- Publication
Photosynthesis Research, 2018, Vol 135, Issue 1-3, p103
- ISSN
0166-8595
- Publication type
Article
- DOI
10.1007/s11120-017-0426-3