Abstract:
:The dependence on temperature of tryptophan fluorescence lifetime in trimeric photosystem I (PSI) complexes from cyanobacteria Synechocystis sp. PCC 6803 during the heating of pre-frozen to - 180 °C in the dark or in the light-activated preparations has been studied. Fluorescence lifetime in samples frozen in the light was longer than in samples frozen in the dark. For samples in 65% glycerol at λreg = 335 nm and at 20 °C, the lifetime of components were as follows: τ1 ≈ 1.2 ns, τ2 ≈ 4.9 ns, and τ3 ≈ 20 ns. The contribution of the first component was negligible. To analyze the contribution of components 2 and 3 derived from frozen-thawed samples, two temperature ranges from - 180 to - 90 °C and above - 90 °C are considered. In doing so, the contributions of these components appear antiphase course to each other. The dependence on temperature of these contributions is explained by the influence of the microconformational protein dynamics on the tryptophan fluorescence lifetime. In the present work, a comparative analysis of temperature-dependent conformational dynamics and electron transfer in cyanobacterial PSI (Schlodder et al., in Biochemistry 37:9466-9476, 1998) and Rhodobacter sphaeroides reaction center complexes (Knox et al., in J Photochem Photobiol B 180:140-148, 2018) was also carried out.
journal_name
Photosynth Resjournal_title
Photosynthesis researchauthors
Knox PP,Korvatovskiy BN,Gorokhov VV,Goryachev SN,Mamedov MD,Paschenko VZdoi
10.1007/s11120-018-0595-8subject
Has Abstractpub_date
2019-03-01 00:00:00pages
441-448issue
1-3eissn
0166-8595issn
1573-5079pii
10.1007/s11120-018-0595-8journal_volume
139pub_type
杂志文章abstract::Since 1986, non-uniform photosynthesis over the leaf area that may be attributed to patchy stomatal closure, has been an important issue in stress physiology of photosynthesis. In this review, I first outline the gaseous environment within the intercellular spaces, because this is the most fundamental background of th...
journal_title:Photosynthesis research
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更新日期:2008-02-01 00:00:00
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journal_title:Photosynthesis research
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pub_type: 杂志文章,评审
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更新日期:2012-09-01 00:00:00
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pub_type: 杂志文章
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更新日期:1996-01-01 00:00:00
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pub_type: 杂志文章
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更新日期:1996-08-01 00:00:00
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更新日期:2007-05-01 00:00:00
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pub_type: 杂志文章
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更新日期:1993-08-01 00:00:00
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更新日期:2008-05-01 00:00:00
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更新日期:2010-11-01 00:00:00
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更新日期:1988-10-01 00:00:00
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更新日期:2009-10-01 00:00:00
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journal_title:Photosynthesis research
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更新日期:2001-01-01 00:00:00
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pub_type: 杂志文章
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journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1007/BF00028750
更新日期:1981-06-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
doi:10.1007/BF00039172
更新日期:1992-08-01 00:00:00
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journal_title:Photosynthesis research
pub_type: 杂志文章
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更新日期:1993-10-01 00:00:00