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New page: left|200px<br /><applet load="1gh0" size="450" color="white" frame="true" align="right" spinBox="true" caption="1gh0, resolution 2.2Å" /> '''CRYSTAL STRUCTURE OF ...
 
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[[Image:1gh0.gif|left|200px]]<br /><applet load="1gh0" size="450" color="white" frame="true" align="right" spinBox="true"
caption="1gh0, resolution 2.2&Aring;" />
'''CRYSTAL STRUCTURE OF C-PHYCOCYANIN FROM SPIRULINA PLATENSIS'''<br />


==Overview==
==CRYSTAL STRUCTURE OF C-PHYCOCYANIN FROM SPIRULINA PLATENSIS==
The crystal structure of C-phycocyanin from the cyanobacterium S., platensis has been determined at 2.2 A resolution. The crystals belong to, the monoclinic crystal form, which has not been previously reported for, phycobiliprotein structures. The structure was solved using the, molecular-replacement method with a final R value of 18.9% (R(free) =, 23.7%) after model building and refinement. In the crystals used for the, study, the C-phycocyanin hexamers formed by face-to-face association of, two trimers are arranged in layers rather than in columns. Three different, kinds of packing between adjacent hexamers in the layer were compared. The, tight packing of two adjacent hexamers formed by four trimers in the, asymmetric unit brings beta155 PCB chromophores close together, so it is, possible that lateral energy transfer takes place through the, beta155-beta155 route.
<StructureSection load='1gh0' size='340' side='right'caption='[[1gh0]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1gh0]] is a 24 chain structure with sequence from [https://en.wikipedia.org/wiki/Arthrospira_platensis Arthrospira platensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GH0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1GH0 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CYC:PHYCOCYANOBILIN'>CYC</scene>, <scene name='pdbligand=MEN:N-METHYL+ASPARAGINE'>MEN</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1gh0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gh0 OCA], [https://pdbe.org/1gh0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1gh0 RCSB], [https://www.ebi.ac.uk/pdbsum/1gh0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1gh0 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PHCA_ARTPT PHCA_ARTPT] Light-harvesting photosynthetic bile pigment-protein from the phycobiliprotein complex.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/gh/1gh0_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1gh0 ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The crystal structure of C-phycocyanin from the cyanobacterium S. platensis has been determined at 2.2 A resolution. The crystals belong to the monoclinic crystal form, which has not been previously reported for phycobiliprotein structures. The structure was solved using the molecular-replacement method with a final R value of 18.9% (R(free) = 23.7%) after model building and refinement. In the crystals used for the study, the C-phycocyanin hexamers formed by face-to-face association of two trimers are arranged in layers rather than in columns. Three different kinds of packing between adjacent hexamers in the layer were compared. The tight packing of two adjacent hexamers formed by four trimers in the asymmetric unit brings beta155 PCB chromophores close together, so it is possible that lateral energy transfer takes place through the beta155-beta155 route.


==About this Structure==
Structure of C-phycocyanin from Spirulina platensis at 2.2 A resolution: a novel monoclinic crystal form for phycobiliproteins in phycobilisomes.,Wang XQ, Li LN, Chang WR, Zhang JP, Gui LL, Guo BJ, Liang DC Acta Crystallogr D Biol Crystallogr. 2001 Jun;57(Pt 6):784-92. Epub 2001, May 25. PMID:11375497<ref>PMID:11375497</ref>
1GH0 is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Arthrospira_platensis Arthrospira platensis] with CYC as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1GH0 OCA].


==Reference==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
Structure of C-phycocyanin from Spirulina platensis at 2.2 A resolution: a novel monoclinic crystal form for phycobiliproteins in phycobilisomes., Wang XQ, Li LN, Chang WR, Zhang JP, Gui LL, Guo BJ, Liang DC, Acta Crystallogr D Biol Crystallogr. 2001 Jun;57(Pt 6):784-92. Epub 2001, May 25. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11375497 11375497]
</div>
<div class="pdbe-citations 1gh0" style="background-color:#fffaf0;"></div>
 
==See Also==
*[[Phycocyanin|Phycocyanin]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Arthrospira platensis]]
[[Category: Arthrospira platensis]]
[[Category: Protein complex]]
[[Category: Large Structures]]
[[Category: Chang, W.R.]]
[[Category: Chang W-R]]
[[Category: Liang, D.C.]]
[[Category: Liang D-C]]
[[Category: Wang, X.Q.]]
[[Category: Wang X-Q]]
[[Category: CYC]]
[[Category: c-phycocyanin from spirulina platensis]]
 
''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 16:03:01 2007''

Latest revision as of 23:31, 27 December 2023

CRYSTAL STRUCTURE OF C-PHYCOCYANIN FROM SPIRULINA PLATENSIS

1gh0, resolution 2.20Å

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