2pps
From Proteopedia
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==Overview== | ==Overview== | ||
| - | The 4 A X-ray structure model of trimeric photosystem I of the | + | 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 < 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. |
==About this Structure== | ==About this Structure== | ||
| - | 2PPS is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Synechococcus_elongatus Synechococcus elongatus] with <scene name='pdbligand=CLA:'>CLA</scene>, <scene name='pdbligand=PQN:'>PQN</scene> and <scene name='pdbligand=SF4:'>SF4</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. This structure | + | 2PPS is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Synechococcus_elongatus Synechococcus elongatus] with <scene name='pdbligand=CLA:'>CLA</scene>, <scene name='pdbligand=PQN:'>PQN</scene> and <scene name='pdbligand=SF4:'>SF4</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. This structure supersedes the now removed PDB entry 1PPS. Known structural/functional Site: <scene name='pdbsite=ETS:The+Cofactors+Cla+2001+-+2006,+Pqn+2007+And+Fs4+2008+-+2+...'>ETS</scene>. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PPS OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Krauss, N.]] | [[Category: Krauss, N.]] | ||
[[Category: Saenger, W.]] | [[Category: Saenger, W.]] | ||
| - | [[Category: Schubert, W | + | [[Category: Schubert, W D.]] |
| - | [[Category: Witt, H | + | [[Category: Witt, H T.]] |
[[Category: CLA]] | [[Category: CLA]] | ||
[[Category: PQN]] | [[Category: PQN]] | ||
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[[Category: thermophilic cyanobacterium]] | [[Category: thermophilic cyanobacterium]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 18:31:57 2008'' |
Revision as of 16:31, 21 February 2008
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PHOTOSYNTHETIC REACTION CENTER AND CORE ANTENNA SYSTEM (TRIMERIC), ALPHA CARBON ONLY
Overview
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 < 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.
About this Structure
2PPS is a Protein complex structure of sequences from Synechococcus elongatus with , and as ligands. This structure supersedes the now removed PDB entry 1PPS. Known structural/functional Site: . 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
Page seeded by OCA on Thu Feb 21 18:31:57 2008
Categories: Protein complex | Synechococcus elongatus | Fromme, P. | Klukas, O. | Krauss, N. | Saenger, W. | Schubert, W D. | Witt, H T. | CLA | PQN | SF4 | Core-antenna light-harvesting system | Helix-bundle membrane protein | Oxygenic photosynthesis | Photosynthetic reaction center | Thermophilic cyanobacterium
