2bhw

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[[Image:2bhw.gif|left|200px]]
[[Image:2bhw.gif|left|200px]]
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{{Structure
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<!--
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|PDB= 2bhw |SIZE=350|CAPTION= <scene name='initialview01'>2bhw</scene>, resolution 2.5&Aring;
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The line below this paragraph, containing "STRUCTURE_2bhw", creates the "Structure Box" on the page.
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|SITE= <scene name='pdbsite=AC1:Dgd+Binding+Site+For+Chain+C'>AC1</scene>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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|LIGAND= <scene name='pdbligand=CHL:CHLOROPHYLL+B'>CHL</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=DGD:DIGALACTOSYL+DIACYL+GLYCEROL+(DGDG)'>DGD</scene>, <scene name='pdbligand=LHG:1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE'>LHG</scene>, <scene name='pdbligand=LUX:(3R,3&#39;R,6&#39;S,9R,9&#39;R,13R,13&#39;S)-4&#39;,5&#39;-DIDEHYDRO-5&#39;,6&#39;,7&#39;,8&#39;,9,9&#39;,10,10&#39;,11,11&#39;,12,12&#39;,13,13&#39;,14,14&#39;,15,15&#39;-OCTADECAHYDRO-BETA,BETA-CAROTENE-3,3&#39;-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&#39;S,5&#39;R,6&#39;S)-5,6,5&#39;,6&#39;-DIEPOXY-5,6,5&#39;,6&#39;-+TETRAHYDRO-BETA,BETA-CAROTENE-3,3&#39;-DIOL'>XAT</scene>
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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|ACTIVITY=
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or leave the SCENE parameter empty for the default display.
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|GENE=
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-->
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|DOMAIN=
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{{STRUCTURE_2bhw| PDB=2bhw | SCENE= }}
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|RELATEDENTRY=
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2bhw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2bhw OCA], [http://www.ebi.ac.uk/pdbsum/2bhw PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2bhw RCSB]</span>
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}}
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'''PEA LIGHT-HARVESTING COMPLEX II AT 2.5 ANGSTROM RESOLUTION'''
'''PEA LIGHT-HARVESTING COMPLEX II AT 2.5 ANGSTROM RESOLUTION'''
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[[Category: Scheltinga, A C.Terwisscha Van.]]
[[Category: Scheltinga, A C.Terwisscha Van.]]
[[Category: Standfuss, J.]]
[[Category: Standfuss, J.]]
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[[Category: chlorophyll]]
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[[Category: Chlorophyll]]
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[[Category: chloroplast]]
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[[Category: Chloroplast]]
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[[Category: chromophore]]
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[[Category: Chromophore]]
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[[Category: lhc-ii]]
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[[Category: Lhc-ii]]
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[[Category: light-harvesting]]
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[[Category: Light-harvesting]]
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[[Category: membrane]]
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[[Category: Membrane]]
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[[Category: membrane protein]]
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[[Category: Membrane protein]]
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[[Category: phosphorylation]]
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[[Category: Phosphorylation]]
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[[Category: photosynthesis]]
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[[Category: Photosynthesis]]
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[[Category: photosystem i]]
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[[Category: Photosystem i]]
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[[Category: photosystem ii]]
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[[Category: Photosystem ii]]
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[[Category: plastid]]
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[[Category: Plastid]]
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[[Category: thylakoid]]
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[[Category: Thylakoid]]
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[[Category: transit peptide]]
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[[Category: Transit peptide]]
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[[Category: transmembrane]]
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[[Category: Transmembrane]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 20:18:44 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 02:06:41 2008''
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Revision as of 17:18, 3 May 2008

Image:2bhw.gif

Template:STRUCTURE 2bhw

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 Page seeded by OCA on Sat May 3 20:18:44 2008

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