2axt
From Proteopedia
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|PDB= 2axt |SIZE=350|CAPTION= <scene name='initialview01'>2axt</scene>, resolution 3.00Å | |PDB= 2axt |SIZE=350|CAPTION= <scene name='initialview01'>2axt</scene>, resolution 3.00Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand= | + | |LIGAND= <scene name='pdbligand=BCR:BETA-CAROTENE'>BCR</scene>, <scene name='pdbligand=BCT:BICARBONATE+ION'>BCT</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=DGD:DIGALACTOSYL+DIACYL+GLYCEROL+(DGDG)'>DGD</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=LHG:1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE'>LHG</scene>, <scene name='pdbligand=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</scene>, <scene name='pdbligand=MGE:(1S)-2-(ALPHA-L-ALLOPYRANOSYLOXY)-1-[(TRIDECANOYLOXY)METHYL]ETHYL+PALMITATE'>MGE</scene>, <scene name='pdbligand=OEC:OXYGEN+EVOLVING+SYSTEM'>OEC</scene>, <scene name='pdbligand=PHO:PHEOPHYTIN+A'>PHO</scene>, <scene name='pdbligand=PQ9:5-[(2E,6E,10E,14E,18E,22E)-3,7,11,15,19,23,27-HEPTAMETHYLOCTACOSA-2,6,10,14,18,22,26-HEPTAENYL]-2,3-DIMETHYLBENZO-1,4-QUINONE'>PQ9</scene>, <scene name='pdbligand=SQD:1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL'>SQD</scene>, <scene name='pdbligand=UNK:UNKNOWN'>UNK</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2axt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2axt OCA], [http://www.ebi.ac.uk/pdbsum/2axt PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2axt RCSB]</span> | ||
}} | }} | ||
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[[Category: Saenger, W.]] | [[Category: Saenger, W.]] | ||
[[Category: Zouni, A.]] | [[Category: Zouni, A.]] | ||
| - | [[Category: BCR]] | ||
| - | [[Category: BCT]] | ||
| - | [[Category: CA]] | ||
| - | [[Category: CLA]] | ||
| - | [[Category: DGD]] | ||
| - | [[Category: FE2]] | ||
| - | [[Category: HEM]] | ||
| - | [[Category: LHG]] | ||
| - | [[Category: LMT]] | ||
| - | [[Category: MGE]] | ||
| - | [[Category: OEC]] | ||
| - | [[Category: PHO]] | ||
| - | [[Category: PQ9]] | ||
| - | [[Category: SQD]] | ||
| - | [[Category: UNK]] | ||
[[Category: membrane complex]] | [[Category: membrane complex]] | ||
[[Category: photosystem]] | [[Category: photosystem]] | ||
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[[Category: transmembrane alpha-helix]] | [[Category: transmembrane alpha-helix]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 01:58:47 2008'' |
Revision as of 22:58, 30 March 2008
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| , resolution 3.00Å | |||||||
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| Ligands: | , , , , , , , , , , , , , , | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal Structure of Photosystem II from Thermosynechococcus elongatus
Overview
Oxygenic photosynthesis in plants, algae and cyanobacteria is initiated at photosystem II, a homodimeric multisubunit protein-cofactor complex embedded in the thylakoid membrane. Photosystem II captures sunlight and powers the unique photo-induced oxidation of water to atmospheric oxygen. Crystallographic investigations of cyanobacterial photosystem II have provided several medium-resolution structures (3.8 to 3.2 A) that explain the general arrangement of the protein matrix and cofactors, but do not give a full picture of the complex. Here we describe the most complete cyanobacterial photosystem II structure obtained so far, showing locations of and interactions between 20 protein subunits and 77 cofactors per monomer. Assignment of 11 beta-carotenes yields insights into electron and energy transfer and photo-protection mechanisms in the reaction centre and antenna subunits. The high number of 14 integrally bound lipids reflects the structural and functional importance of these molecules for flexibility within and assembly of photosystem II. A lipophilic pathway is proposed for the diffusion of secondary plastoquinone that transfers redox equivalents from photosystem II to the photosynthetic chain. The structure provides information about the Mn4Ca cluster, where oxidation of water takes place. Our study uncovers near-atomic details necessary to understand the processes that convert light to chemical energy.
About this Structure
2AXT is a Protein complex structure of sequences from Thermosynechococcus elongatus. Full crystallographic information is available from OCA.
Reference
Towards complete cofactor arrangement in the 3.0 A resolution structure of photosystem II., Loll B, Kern J, Saenger W, Zouni A, Biesiadka J, Nature. 2005 Dec 15;438(7070):1040-4. PMID:16355230
Page seeded by OCA on Mon Mar 31 01:58:47 2008
