1ilx

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[[Image:1ilx.gif|left|200px]]
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{{Seed}}
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[[Image:1ilx.png|left|200px]]
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{{STRUCTURE_1ilx| PDB=1ilx | SCENE= }}
{{STRUCTURE_1ilx| PDB=1ilx | SCENE= }}
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'''Excited State Dynamics in Photosystem II Revised. New Insights from the X-ray Structure.'''
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===Excited State Dynamics in Photosystem II Revised. New Insights from the X-ray Structure.===
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==Overview==
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The heart of oxygenic photosynthesis is photosystem II (PSII), a multisubunit protein complex that uses solar energy to drive the splitting of water and production of molecular oxygen. The effectiveness of the photochemical reaction center of PSII depends on the efficient transfer of excitation energy from the surrounding antenna chlorophylls. A kinetic model for PSII, based on the x-ray crystal structure coordinates of 37 antenna and reaction center pigment molecules, allows us to map the major energy transfer routes from the antenna chlorophylls to the reaction center chromophores. The model shows that energy transfer to the reaction center is slow compared with the rate of primary electron transport and depends on a few bridging chlorophyll molecules. This unexpected energetic isolation of the reaction center in PSII is similar to that found in the bacterial photosystem, conflicts with the established view of the photophysics of PSII, and may be a functional requirement for primary photochemistry in photosynthesis. In addition, the model predicts a value for the intrinsic photochemical rate constant that is 4 times that found in bacterial reaction centers.
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The line below this paragraph, {{ABSTRACT_PUBMED_11459991}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 11459991 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11459991}}
==About this Structure==
==About this Structure==
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[[Category: Antenna chlorophyll]]
[[Category: Antenna chlorophyll]]
[[Category: Exitation transfer]]
[[Category: Exitation transfer]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 20:08:18 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 13:29:51 2008''

Revision as of 10:29, 1 July 2008

Image:1ilx.png

Template:STRUCTURE 1ilx

Excited State Dynamics in Photosystem II Revised. New Insights from the X-ray Structure.

Template:ABSTRACT PUBMED 11459991

About this Structure

Full crystallographic information is available from OCA.

Reference

Excited-state dynamics in photosystem II: insights from the x-ray crystal structure., Vasil'ev S, Orth P, Zouni A, Owens TG, Bruce D, Proc Natl Acad Sci U S A. 2001 Jul 17;98(15):8602-7. PMID:11459991

Page seeded by OCA on Tue Jul 1 13:29:51 2008

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