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[[Image:1kn1.gif|left|200px]]
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{{STRUCTURE_1kn1|  PDB=1kn1  |  SCENE=  }}
'''Crystal structure of allophycocyanin'''


==Crystal structure of allophycocyanin==
<StructureSection load='1kn1' size='340' side='right'caption='[[1kn1]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1kn1]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Neopyropia_yezoensis Neopyropia yezoensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KN1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1KN1 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></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=1kn1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kn1 OCA], [https://pdbe.org/1kn1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1kn1 RCSB], [https://www.ebi.ac.uk/pdbsum/1kn1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1kn1 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PHAA_NEOYE PHAA_NEOYE] Light-harvesting photosynthetic tetrapyrrole chromophore-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/kn/1kn1_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=1kn1 ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The crystal structure of allophycocyanin from red algae Porphyra yezoensis (APC-PY) at 2.2-A resolution has been determined by the molecular replacement method. The crystal belongs to space group R32 with cell parameters a = b = 105.3 A, c = 189.4 A, alpha = beta = 90 degrees, gamma = 120 degrees. After several cycles of refinement using program X-PLOR and model building based on the electron density map, the crystallographic R-factor converged to 19.3% (R-free factor is 26.9%) in the range of 10.0 to 2.2 A. The r.m.s. deviations of bond length and angles are 0.015 A and 2.9 degrees, respectively. In the crystal, two APC-PY trimers associate face to face into a hexamer. The assembly of two trimers within the hexamer is similar to that of C-phycocyanin (C-PC) and R-phycoerythrin (R-PE) hexamers, but the assembly tightness of the two trimers to the hexamer is not so high as that in C-PC and R-PE hexamers. The chromophore-protein interactions and possible pathway of energy transfer were discussed. Phycocyanobilin 1alpha84 of APC-PY forms 5 hydrogen bonds with 3 residues in subunit 2beta of another monomer. In R-PE and C-PC, chromophore 1alpha84 only forms 1 hydrogen bond with 2beta77 residue in subunit 2beta. This result may support and explain great spectrum difference exists between APC trimer and monomer.


==Overview==
Crystal structure of allophycocyanin from red algae Porphyra yezoensis at 2.2-A resolution.,Liu JY, Jiang T, Zhang JP, Liang DC J Biol Chem. 1999 Jun 11;274(24):16945-52. PMID:10358042<ref>PMID:10358042</ref>
The crystal structure of allophycocyanin from red algae Porphyra yezoensis (APC-PY) at 2.2-A resolution has been determined by the molecular replacement method. The crystal belongs to space group R32 with cell parameters a = b = 105.3 A, c = 189.4 A, alpha = beta = 90 degrees, gamma = 120 degrees. After several cycles of refinement using program X-PLOR and model building based on the electron density map, the crystallographic R-factor converged to 19.3% (R-free factor is 26.9%) in the range of 10.0 to 2.2 A. The r.m.s. deviations of bond length and angles are 0.015 A and 2.9 degrees, respectively. In the crystal, two APC-PY trimers associate face to face into a hexamer. The assembly of two trimers within the hexamer is similar to that of C-phycocyanin (C-PC) and R-phycoerythrin (R-PE) hexamers, but the assembly tightness of the two trimers to the hexamer is not so high as that in C-PC and R-PE hexamers. The chromophore-protein interactions and possible pathway of energy transfer were discussed. Phycocyanobilin 1alpha84 of APC-PY forms 5 hydrogen bonds with 3 residues in subunit 2beta of another monomer. In R-PE and C-PC, chromophore 1alpha84 only forms 1 hydrogen bond with 2beta77 residue in subunit 2beta. This result may support and explain great spectrum difference exists between APC trimer and monomer.


==About this Structure==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
1KN1 is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Porphyra_yezoensis Porphyra yezoensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KN1 OCA].
</div>
<div class="pdbe-citations 1kn1" style="background-color:#fffaf0;"></div>


==Reference==
==See Also==
Crystal structure of allophycocyanin from red algae Porphyra yezoensis at 2.2-A resolution., Liu JY, Jiang T, Zhang JP, Liang DC, J Biol Chem. 1999 Jun 11;274(24):16945-52. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10358042 10358042]
*[[Allophycocyanin 3D structures|Allophycocyanin 3D structures]]
[[Category: Porphyra yezoensis]]
== References ==
[[Category: Protein complex]]
<references/>
[[Category: Chang, W R.]]
__TOC__
[[Category: Jiang, T.]]
</StructureSection>
[[Category: Liang, D C.]]
[[Category: Large Structures]]
[[Category: Liu, J Y.]]
[[Category: Neopyropia yezoensis]]
[[Category: Zhang, J P.]]
[[Category: Chang WR]]
[[Category: Helix-turn-helix]]
[[Category: Jiang T]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May  2 22:56:03 2008''
[[Category: Liang DC]]
[[Category: Liu JY]]
[[Category: Zhang JP]]

Latest revision as of 10:29, 23 October 2024

Crystal structure of allophycocyaninCrystal structure of allophycocyanin

Structural highlights

1kn1 is a 2 chain structure with sequence from Neopyropia yezoensis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.2Å
Ligands:
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

PHAA_NEOYE Light-harvesting photosynthetic tetrapyrrole chromophore-protein from the phycobiliprotein complex.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The crystal structure of allophycocyanin from red algae Porphyra yezoensis (APC-PY) at 2.2-A resolution has been determined by the molecular replacement method. The crystal belongs to space group R32 with cell parameters a = b = 105.3 A, c = 189.4 A, alpha = beta = 90 degrees, gamma = 120 degrees. After several cycles of refinement using program X-PLOR and model building based on the electron density map, the crystallographic R-factor converged to 19.3% (R-free factor is 26.9%) in the range of 10.0 to 2.2 A. The r.m.s. deviations of bond length and angles are 0.015 A and 2.9 degrees, respectively. In the crystal, two APC-PY trimers associate face to face into a hexamer. The assembly of two trimers within the hexamer is similar to that of C-phycocyanin (C-PC) and R-phycoerythrin (R-PE) hexamers, but the assembly tightness of the two trimers to the hexamer is not so high as that in C-PC and R-PE hexamers. The chromophore-protein interactions and possible pathway of energy transfer were discussed. Phycocyanobilin 1alpha84 of APC-PY forms 5 hydrogen bonds with 3 residues in subunit 2beta of another monomer. In R-PE and C-PC, chromophore 1alpha84 only forms 1 hydrogen bond with 2beta77 residue in subunit 2beta. This result may support and explain great spectrum difference exists between APC trimer and monomer.

Crystal structure of allophycocyanin from red algae Porphyra yezoensis at 2.2-A resolution.,Liu JY, Jiang T, Zhang JP, Liang DC J Biol Chem. 1999 Jun 11;274(24):16945-52. PMID:10358042[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

See Also

References

  1. ↑ Liu JY, Jiang T, Zhang JP, Liang DC. Crystal structure of allophycocyanin from red algae Porphyra yezoensis at 2.2-A resolution. J Biol Chem. 1999 Jun 11;274(24):16945-52. PMID:10358042

1kn1, resolution 2.20Å

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