2pps

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[[Image:2pps.gif|left|200px]]
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{{Seed}}
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[[Image:2pps.png|left|200px]]
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{{STRUCTURE_2pps| PDB=2pps | SCENE= }}
{{STRUCTURE_2pps| PDB=2pps | SCENE= }}
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'''PHOTOSYNTHETIC REACTION CENTER AND CORE ANTENNA SYSTEM (TRIMERIC), ALPHA CARBON ONLY'''
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===PHOTOSYNTHETIC REACTION CENTER AND CORE ANTENNA SYSTEM (TRIMERIC), ALPHA CARBON ONLY===
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==Overview==
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The 4 A X-ray structure model of trimeric photosystem I of the cyanobacterium Synechococcus elongatus reveals 31 transmembrane, nine surface and three stromal alpha-helices per monomer, assigned to the 11 protein subunits: PsaA and PsaB are related by a pseudo two-fold axis normal to the membrane plane, along which the electron transfer pigments are arranged. 65 antenna chlorophyll a (Chl a) molecules separated by &lt; or = 16 A form an oval, clustered net continuous with the electron transfer chain through the second and third Chl a pairs of the electron transfer system. This suggests a dual role for these Chl a both in excitation energy and electron transfer. The architecture of the protein core indicates quinone and iron-sulphur type reaction centres to have a common ancestor.
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The line below this paragraph, {{ABSTRACT_PUBMED_8901876}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 8901876 is the PubMed ID number.
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{{ABSTRACT_PUBMED_8901876}}
==About this Structure==
==About this Structure==
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[[Category: Photosynthetic reaction center]]
[[Category: Photosynthetic reaction center]]
[[Category: Thermophilic cyanobacterium]]
[[Category: Thermophilic cyanobacterium]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 13:35:37 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 09:54:41 2008''

Revision as of 06:54, 28 July 2008

Image:2pps.png

Template:STRUCTURE 2pps

PHOTOSYNTHETIC REACTION CENTER AND CORE ANTENNA SYSTEM (TRIMERIC), ALPHA CARBON ONLY

Template:ABSTRACT PUBMED 8901876

About this Structure

This structure supersedes the now removed PDB entry 1pps. Full crystallographic information is available from OCA.

Reference

Photosystem I at 4 A resolution represents the first structural model of a joint photosynthetic reaction centre and core antenna system., Krauss N, Schubert WD, Klukas O, Fromme P, Witt HT, Saenger W, Nat Struct Biol. 1996 Nov;3(11):965-73. PMID:8901876

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