1c51

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{{STRUCTURE_1c51| PDB=1c51 | SCENE= }}
{{STRUCTURE_1c51| PDB=1c51 | 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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An improved electron density map of photosystem I (PSI) calculated at 4-A resolution yields a more detailed structural model of the stromal subunits PsaC, PsaD, and PsaE than previously reported. The NMR structure of the subunit PsaE of PSI from Synechococcus sp. PCC7002 (Falzone, C. J., Kao, Y.-H., Zhao, J., Bryant, D. A., and Lecomte, J. T. J. (1994) Biochemistry 33, 6052-6062) has been used as a model to interpret the region of the electron density map corresponding to this subunit. The spatial orientation with respect to other subunits is described as well as the possible interactions between the stromal subunits. A first model of PsaD consisting of a four-stranded beta-sheet and an alpha-helix is suggested, indicating that this subunit partly shields PsaC from the stromal side. In addition to the improvements on the stromal subunits, the structural model of the membrane-integral region of PSI is also extended. The current electron density map allows the identification of the N and C termini of the subunits PsaA and PsaB. The 11-transmembrane alpha-helices of these subunits can now be assigned uniquely to the hydrophobic segments identified by hydrophobicity analyses.
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(as it appears on PubMed at http://www.pubmed.gov), where 10066799 is the PubMed ID number.
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{{ABSTRACT_PUBMED_10066799}}
==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 Fri May 2 12:20:08 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 20:13:09 2008''

Revision as of 17:13, 30 June 2008

Image:1c51.png

Template:STRUCTURE 1c51

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

Template:ABSTRACT PUBMED 10066799

About this Structure

Full crystallographic information is available from OCA.

Reference

Photosystem I, an improved model of the stromal subunits PsaC, PsaD, and PsaE., Klukas O, Schubert WD, Jordan P, Krauss N, Fromme P, Witt HT, Saenger W, J Biol Chem. 1999 Mar 12;274(11):7351-60. PMID:10066799

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