1qzv
From Proteopedia
(New page: 200px<br /><applet load="1qzv" size="450" color="white" frame="true" align="right" spinBox="true" caption="1qzv, resolution 4.44Å" /> '''Crystal structure of...) |
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| - | [[Image:1qzv.gif|left|200px]]<br /><applet load="1qzv" size=" | + | [[Image:1qzv.gif|left|200px]]<br /><applet load="1qzv" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1qzv, resolution 4.44Å" /> | caption="1qzv, resolution 4.44Å" /> | ||
'''Crystal structure of plant photosystem I'''<br /> | '''Crystal structure of plant photosystem I'''<br /> | ||
==Overview== | ==Overview== | ||
| - | Oxygenic photosynthesis is the principal producer of both oxygen and | + | Oxygenic photosynthesis is the principal producer of both oxygen and organic matter on Earth. The conversion of sunlight into chemical energy is driven by two multisubunit membrane protein complexes named photosystem I and II. We determined the crystal structure of the complete photosystem I (PSI) from a higher plant (Pisum sativum var. alaska) to 4.4 A resolution. Its intricate structure shows 12 core subunits, 4 different light-harvesting membrane proteins (LHCI) assembled in a half-moon shape on one side of the core, 45 transmembrane helices, 167 chlorophylls, 3 Fe-S clusters and 2 phylloquinones. About 20 chlorophylls are positioned in strategic locations in the cleft between LHCI and the core. This structure provides a framework for exploration not only of energy and electron transfer but also of the evolutionary forces that shaped the photosynthetic apparatus of terrestrial plants after the divergence of chloroplasts from marine cyanobacteria one billion years ago. |
==About this Structure== | ==About this Structure== | ||
| - | 1QZV is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Pisum_sativum Pisum sativum] with CL1, PQN and SF4 as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http:// | + | 1QZV is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Pisum_sativum Pisum sativum] with <scene name='pdbligand=CL1:'>CL1</scene>, <scene name='pdbligand=PQN:'>PQN</scene> and <scene name='pdbligand=SF4:'>SF4</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QZV OCA]. |
==Reference== | ==Reference== | ||
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[[Category: plant photosynthetic reaction center]] | [[Category: plant photosynthetic reaction center]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:45:29 2008'' |
Revision as of 12:45, 21 February 2008
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Crystal structure of plant photosystem I
Overview
Oxygenic photosynthesis is the principal producer of both oxygen and organic matter on Earth. The conversion of sunlight into chemical energy is driven by two multisubunit membrane protein complexes named photosystem I and II. We determined the crystal structure of the complete photosystem I (PSI) from a higher plant (Pisum sativum var. alaska) to 4.4 A resolution. Its intricate structure shows 12 core subunits, 4 different light-harvesting membrane proteins (LHCI) assembled in a half-moon shape on one side of the core, 45 transmembrane helices, 167 chlorophylls, 3 Fe-S clusters and 2 phylloquinones. About 20 chlorophylls are positioned in strategic locations in the cleft between LHCI and the core. This structure provides a framework for exploration not only of energy and electron transfer but also of the evolutionary forces that shaped the photosynthetic apparatus of terrestrial plants after the divergence of chloroplasts from marine cyanobacteria one billion years ago.
About this Structure
1QZV is a Protein complex structure of sequences from Pisum sativum with , and as ligands. Full crystallographic information is available from OCA.
Reference
Crystal structure of plant photosystem I., Ben-Shem A, Frolow F, Nelson N, Nature. 2003 Dec 11;426(6967):630-5. PMID:14668855
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