2bhw

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[[Image:2bhw.gif|left|200px]]<br /><applet load="2bhw" size="350" color="white" frame="true" align="right" spinBox="true"
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[[Image:2bhw.gif|left|200px]]
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caption="2bhw, resolution 2.5&Aring;" />
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'''PEA LIGHT-HARVESTING COMPLEX II AT 2.5 ANGSTROM RESOLUTION'''<br />
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{{Structure
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|PDB= 2bhw |SIZE=350|CAPTION= <scene name='initialview01'>2bhw</scene>, resolution 2.5&Aring;
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|SITE= <scene name='pdbsite=AC1:Dgd+Binding+Site+For+Chain+C'>AC1</scene>
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|LIGAND= <scene name='pdbligand=LUX:(3R,3'R,6'S,9R,9'R,13R,13'S)-4',5'-DIDEHYDRO-5',6',7',8',9,9',10,10',11,11',12,12',13,13',14,14',15,15'-OCTADECAHYDRO-BETA,BETA-CAROTENE-3,3'-DIOL'>LUX</scene>, <scene name='pdbligand=NEX:(1R,3R)-6-{(3E,5E,7E,9E,11E,13E,15E,17E)-18-[(1S,4R,6R)-4-HYDROXY-2,2,6-TRIMETHYL-7-OXABICYCLO[4.1.0]HEPT-1-YL]-3,7,12,16-TETRAMETHYLOCTADECA-1,3,5,7,9,11,13,15,17-NONAENYLIDENE}-1,5,5-TRIMETHYLCYCLOHEXANE-1,3-DIOL'>NEX</scene>, <scene name='pdbligand=XAT:(3S,5R,6S,3'S,5'R,6'S)-5,6,5',6'-DIEPOXY-5,6,5',6'-+TETRAHYDRO-BETA,BETA-CAROTENE-3,3'-DIOL'>XAT</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=CHL:CHLOROPHYLL+B'>CHL</scene>, <scene name='pdbligand=LHG:1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE'>LHG</scene> and <scene name='pdbligand=DGD:DIGALACTOSYL DIACYL GLYCEROL (DGDG)'>DGD</scene>
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|ACTIVITY=
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|GENE=
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}}
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'''PEA LIGHT-HARVESTING COMPLEX II AT 2.5 ANGSTROM RESOLUTION'''
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==Overview==
==Overview==
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==About this Structure==
==About this Structure==
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2BHW is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Pisum_sativum Pisum sativum] with <scene name='pdbligand=LUX:'>LUX</scene>, <scene name='pdbligand=NEX:'>NEX</scene>, <scene name='pdbligand=XAT:'>XAT</scene>, <scene name='pdbligand=CLA:'>CLA</scene>, <scene name='pdbligand=CHL:'>CHL</scene>, <scene name='pdbligand=LHG:'>LHG</scene> and <scene name='pdbligand=DGD:'>DGD</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Known structural/functional Site: <scene name='pdbsite=AC1:Dgd+Binding+Site+For+Chain+C'>AC1</scene>. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2BHW OCA].
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2BHW is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Pisum_sativum Pisum sativum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2BHW OCA].
==Reference==
==Reference==
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Mechanisms of photoprotection and nonphotochemical quenching in pea light-harvesting complex at 2.5 A resolution., Standfuss J, Terwisscha van Scheltinga AC, Lamborghini M, Kuhlbrandt W, EMBO J. 2005 Mar 9;24(5):919-28. Epub 2005 Feb 17. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15719016 15719016]
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Mechanisms of photoprotection and nonphotochemical quenching in pea light-harvesting complex at 2.5 A resolution., Standfuss J, Terwisscha van Scheltinga AC, Lamborghini M, Kuhlbrandt W, EMBO J. 2005 Mar 9;24(5):919-28. Epub 2005 Feb 17. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15719016 15719016]
[[Category: Pisum sativum]]
[[Category: Pisum sativum]]
[[Category: Single protein]]
[[Category: Single protein]]
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[[Category: transmembrane]]
[[Category: transmembrane]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 16:37:58 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 16:02:09 2008''

Revision as of 14:02, 20 March 2008

Image:2bhw.gif


PDB ID 2bhw

Drag the structure with the mouse to rotate
, resolution 2.5Å
Sites:
Ligands: , , , , , and
Coordinates: save as pdb, mmCIF, xml



PEA LIGHT-HARVESTING COMPLEX II AT 2.5 ANGSTROM RESOLUTION


Overview

The plant light-harvesting complex of photosystem II (LHC-II) collects and transmits solar energy for photosynthesis in chloroplast membranes and has essential roles in regulation of photosynthesis and in photoprotection. The 2.5 A structure of pea LHC-II determined by X-ray crystallography of stacked two-dimensional crystals shows how membranes interact to form chloroplast grana, and reveals the mutual arrangement of 42 chlorophylls a and b, 12 carotenoids and six lipids in the LHC-II trimer. Spectral assignment of individual chlorophylls indicates the flow of energy in the complex and the mechanism of photoprotection in two close chlorophyll a-lutein pairs. We propose a simple mechanism for the xanthophyll-related, slow component of nonphotochemical quenching in LHC-II, by which excess energy is transferred to a zeaxanthin replacing violaxanthin in its binding site, and dissipated as heat. Our structure shows the complex in a quenched state, which may be relevant for the rapid, pH-induced component of nonphotochemical quenching.

About this Structure

2BHW is a Single protein structure of sequence from Pisum sativum. Full crystallographic information is available from OCA.

Reference

Mechanisms of photoprotection and nonphotochemical quenching in pea light-harvesting complex at 2.5 A resolution., Standfuss J, Terwisscha van Scheltinga AC, Lamborghini M, Kuhlbrandt W, EMBO J. 2005 Mar 9;24(5):919-28. Epub 2005 Feb 17. PMID:15719016

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