Abstract
The role of an AAA protease FtsH (slr0228) in the turnover of the D1 protein was studied under moderate heat stress conditions using wild-type cells of the cyanobacterium Synechocystis PCC 6803 and the mutant cells lacking a homologue of FtsH (slr0228). When the growth temperature of the wild-type was shifted from 30 °C to 40 °C, growth and oxygen-evolving activity were partially inhibited. Under the same heat stress, growth of the mutant was inhibited more significantly (63% inhibition after 5 days heat stress, compared with 26% inhibition with the wild-type cells) and the oxygen-evolving activity was also impaired in parallel. With heat stress at 42 °C, the level of the D1 protein of wild type cells was decreased, whereas that in mutant cells was not. The responses of cyanobacterial cells to heat stress observed here are quite similar to those to light stress that were reported previously [P. Silva, E. Thompson, S. Bailey, O. Kruse, C. W. Mullineaux, C. Robinson, N. H. Mann and P. J. Nixon, Plant Cell, 2003, 15, 2152-2164, ref. 24]. From these results, we suggest that the FtsH protease (slr0228) is responsible for both the heat-induced and light-induced degradation of the D1 protein. Notably, the amount of FtsH increased when the wild-type cells were exposed to heat stress or light stress, indicating that the up-regulation of the FtsH protease in the thylakoids is crucial for the cyanobacterial cells to cope with these abiotic stresses.
| Original language | English |
|---|---|
| Pages (from-to) | 983-990 |
| Number of pages | 8 |
| Journal | Photochemical and Photobiological Sciences |
| Volume | 4 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - Dec 2005 |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Cell Biology
- Biochemistry, Genetics and Molecular Biology(all)
- Biochemistry
- Biophysics
Cite this
Quality control of photosystem II : An FtsH protease plays an essential role in the turnover of the reaction center D1 protein in Synechocystis PCC 6803 under heat stress as well as light stress conditions. / Kamata, Takashi; Hiramoto, Hideki; Morita, Noriko; Shen, Jian-Ren; Mann, Nicholas H.; Yamamoto, Yasusi.
In: Photochemical and Photobiological Sciences, Vol. 4, No. 12, 12.2005, p. 983-990.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Quality control of photosystem II
T2 - An FtsH protease plays an essential role in the turnover of the reaction center D1 protein in Synechocystis PCC 6803 under heat stress as well as light stress conditions
AU - Kamata, Takashi
AU - Hiramoto, Hideki
AU - Morita, Noriko
AU - Shen, Jian-Ren
AU - Mann, Nicholas H.
AU - Yamamoto, Yasusi
PY - 2005/12
Y1 - 2005/12
N2 - The role of an AAA protease FtsH (slr0228) in the turnover of the D1 protein was studied under moderate heat stress conditions using wild-type cells of the cyanobacterium Synechocystis PCC 6803 and the mutant cells lacking a homologue of FtsH (slr0228). When the growth temperature of the wild-type was shifted from 30 °C to 40 °C, growth and oxygen-evolving activity were partially inhibited. Under the same heat stress, growth of the mutant was inhibited more significantly (63% inhibition after 5 days heat stress, compared with 26% inhibition with the wild-type cells) and the oxygen-evolving activity was also impaired in parallel. With heat stress at 42 °C, the level of the D1 protein of wild type cells was decreased, whereas that in mutant cells was not. The responses of cyanobacterial cells to heat stress observed here are quite similar to those to light stress that were reported previously [P. Silva, E. Thompson, S. Bailey, O. Kruse, C. W. Mullineaux, C. Robinson, N. H. Mann and P. J. Nixon, Plant Cell, 2003, 15, 2152-2164, ref. 24]. From these results, we suggest that the FtsH protease (slr0228) is responsible for both the heat-induced and light-induced degradation of the D1 protein. Notably, the amount of FtsH increased when the wild-type cells were exposed to heat stress or light stress, indicating that the up-regulation of the FtsH protease in the thylakoids is crucial for the cyanobacterial cells to cope with these abiotic stresses.
AB - The role of an AAA protease FtsH (slr0228) in the turnover of the D1 protein was studied under moderate heat stress conditions using wild-type cells of the cyanobacterium Synechocystis PCC 6803 and the mutant cells lacking a homologue of FtsH (slr0228). When the growth temperature of the wild-type was shifted from 30 °C to 40 °C, growth and oxygen-evolving activity were partially inhibited. Under the same heat stress, growth of the mutant was inhibited more significantly (63% inhibition after 5 days heat stress, compared with 26% inhibition with the wild-type cells) and the oxygen-evolving activity was also impaired in parallel. With heat stress at 42 °C, the level of the D1 protein of wild type cells was decreased, whereas that in mutant cells was not. The responses of cyanobacterial cells to heat stress observed here are quite similar to those to light stress that were reported previously [P. Silva, E. Thompson, S. Bailey, O. Kruse, C. W. Mullineaux, C. Robinson, N. H. Mann and P. J. Nixon, Plant Cell, 2003, 15, 2152-2164, ref. 24]. From these results, we suggest that the FtsH protease (slr0228) is responsible for both the heat-induced and light-induced degradation of the D1 protein. Notably, the amount of FtsH increased when the wild-type cells were exposed to heat stress or light stress, indicating that the up-regulation of the FtsH protease in the thylakoids is crucial for the cyanobacterial cells to cope with these abiotic stresses.
UR - http://www.scopus.com/inward/record.url?scp=29144501511&partnerID=8YFLogxK
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U2 - 10.1039/b506068k
DO - 10.1039/b506068k
M3 - Article
VL - 4
SP - 983
EP - 990
JO - Photochemical and Photobiological Sciences
JF - Photochemical and Photobiological Sciences
SN - 1474-905X
IS - 12
ER -