Constructed deletions in lumen-exposed regions of the D1 protein in the cyanobacterium Synechocystis 6803: Effects on D1 insertion and accumulation in the thylakoid membrane, and on Photosystem II assembly

1996 ◽  
Vol 49 (2) ◽  
pp. 131-140 ◽  
Author(s):  
Gaza Salih ◽  
Ronney Wiklund ◽  
Taina Tyystj�rvi ◽  
Pirkko M�enp�� ◽  
Catherine Gerez ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Thylakoid Membrane ◽  
D1 Protein ◽  
Synechocystis 6803

Studies of Components of the Thylakoid Membrane of Undamaged and Damaged Spruce Trees at Different Mountain Sites

1993 ◽  
Vol 48 (11-12) ◽  
pp. 911-922 ◽  
Author(s):  
Aloysius Wild ◽  
Petra Strobel ◽  
Ute Flammersfeld
Keyword(s):  
Electron Transport ◽  
Photosystem Ii ◽  
Chlorophyll Content ◽  
Thylakoid Membrane ◽  
Electron Transport Rate ◽  
D1 Protein ◽  
Cytochrome F ◽  
West Germany ◽  
Transport Rate ◽  
Photosynthetic Membranes

During a five-year period, components of the thylakoid membrane in needles of the second generation of undamaged and damaged trees of Norway spruce were studied at three different mountain sites in West Germany. Visible signs of damage at these sites are a yellowing of the light-exposed sides of the needles as well as the loss of needles. The goal of this study was to determine damage-induced alterations in composition and physiological reactions of the thylakoid membranes in spruce needles. In order to meet this purpose, contents of chlorophyll a and b, electron transport rate of photosystem II, contents of the D 1 protein, cytochrome f, as well as P-700 were measured. The chlorophyll content in the needles of the damaged spruce trees was significantly lower than in the needles of the undamaged trees. In addition to this, the typical annual course of chlorophyll content was exclusively observed in the needles of the undamaged spruce trees. If related to dry weight, a drastic reduction of the electron transport rate and of the redox components of the thylakoid membrane was observed due to damage, indicating a degeneration of the photosynthetic membranes. The contents of D1 protein and the photosynthetic electron transport rates were also markedly reduced in the needles of the damaged trees, when related to chlorophyll content of thylakoids, suggesting an early and particular impairment of photosystem II. The comparison of spruce trees showing different signs of damage demonstrates that certain biochemical parameters concerning the photosynthetic membranes (chlorophyll, cytochrome f, ratio photosystem II/I) reflect the extent of damage and are suitable for an early indication of a beginning, but still invisible damage of spruce trees.

Charge stabilization and recombination in Photosystem II containing the D1′ protein product of the psbA1 gene in Synechocystis 6803

2004 ◽  
Vol 6 (20) ◽  
pp. 4832-4837 ◽  
Author(s):  
Cosmin Sicora ◽  
Ronney Wiklund ◽  
Christer Jansson ◽  
Imre Vass
Keyword(s):  
Photosystem Ii ◽  
D1 Protein ◽  
Protein Product ◽  
Synechocystis 6803 ◽  
Charge Stabilization

Distribution and Characteristics of Triazine-Resistant Powell Amaranth (Amaranthus powellii) in Idaho

Weed Science ◽  
1992 ◽  
Vol 40 (4) ◽  
pp. 507-512 ◽  
Author(s):  
Charlotte V. Eberlein ◽  
Kassim Al-Khatib ◽  
Mary J. Guttieri ◽  
E. Patrick Fuerst
Keyword(s):  
Hydrogen Bonding ◽  
Photosystem Ii ◽  
Thylakoid Membrane ◽  
D1 Protein ◽  
Protein Sequencing ◽  
Potato Field ◽  
Triazine Herbicides ◽  
Binding Studies ◽  
Triazine Resistance ◽  
Amaranthus Powellii

A triazine-resistant (TR) biotype of Powell amaranth was discovered in 1989 in a potato field treated with metribuzin. A survey of all agricultural counties in Idaho showed that the TR Powell amaranth infestation was localized in the southeastern corner of Gooding county in southern Idaho. To determine the mechanism of triazine resistance, I50values for inhibition of photosystem II were determined for atrazine, metribuzin, and diuron using thylakoids isolated from TR and triazine-susceptible (TS) biotypes. TR/TS ratios based on I50values were 134 for atrazine, 62 for metribuzin, and 1.9 for diuron. Results of binding studies with atrazine and metribuzin were consistent with the I50studies, indicating that resistance was due to reduced binding of triazines to the thylakoid membrane D1 protein. Sequencing the chloroplastpsbA gene from TR and TS biotypes revealed a serine 264 to glycine change in the TR biotype. The mutation presumably resulted in reduced hydrogen bonding between triazine herbicides and the Dl protein.

Turnover of the D1 protein and of Photosystem II in a Synechocystis 6803 mutant lacking Tyrz

1995 ◽  
Vol 45 (2) ◽  
pp. 99-104 ◽  
Author(s):  
Wim Vermaas ◽  
Cathy Madsen ◽  
Jiujiang Yu ◽  
Janine Visser ◽  
James Metz ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
D1 Protein ◽  
Synechocystis 6803

Recovery of Photosystem II Activity in PhotoinhibitedSynechocystisCells:  Light-Dependent Translation Activity Is Required besides Light-Independent Synthesis of the D1 Protein†

Biochemistry ◽  
2000 ◽  
Vol 39 (8) ◽  
pp. 2032-2041 ◽  
Author(s):  
Sabine Constant ◽  
Yael Eisenberg-Domovitch ◽  
Itzhak Ohad ◽  
Diana Kirilovsky
Keyword(s):  
Photosystem Ii ◽  
D1 Protein ◽  
Independent Synthesis ◽  
Photosystem Ii Activity

Breakdown of the photosystem II reaction center D1 protein under photoinhibitory conditions: identification and localization of the C-terminal degradation products

Biochemistry ◽  
1991 ◽  
Vol 30 (42) ◽  
pp. 10220-10226 ◽  
Author(s):  
Roberto Barbato ◽  
Giulia Friso ◽  
Maria Teresa Giardi ◽  
Fernanda Rigoni ◽  
Giorgio Mario Giacometti
Keyword(s):  
Photosystem Ii ◽  
Reaction Center ◽  
Degradation Products ◽  
D1 Protein
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