1LIA

CRYSTAL STRUCTURE OF R-PHYCOERYTHRIN FROM POLYSIPHONIA AT 2.8 A RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.180 

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This is version 1.2 of the entry. See complete history


Literature

Crystal structure of R-phycoerythrin from Polysiphonia urceolata at 2.8 A resolution.

Chang, W.R.Jiang, T.Wan, Z.L.Zhang, J.P.Yang, Z.X.Liang, D.C.

(1996) J Mol Biol 262: 721-731

  • DOI: 10.1006/jmbi.1996.0547
  • Primary Citation of Related Structures:  
    1LIA

  • PubMed Abstract: 
  • The structure of R-phycoerythrin (R-PE) from Polysiphonia urceolata was determined at 2.8 A resolution. The crystals belong to space group R3 with unit cell dimensions of a = b = 189.8 A, c = 60.1 A. The subunit composition of R-PE is (alpha 2 beta 2)3 g ...

    The structure of R-phycoerythrin (R-PE) from Polysiphonia urceolata was determined at 2.8 A resolution. The crystals belong to space group R3 with unit cell dimensions of a = b = 189.8 A, c = 60.1 A. The subunit composition of R-PE is (alpha 2 beta 2)3 gamma. The three-dimensional structure of R-PE was solved by the multiple isomorphous replacement method. After several cycles of model building and refinement, the crystallographic R-factor of the final model is 18.0% with data from 10.0 to 2.8 A resolution. The four phycoerythrobilin chromophores alpha 84, alpha 140a, beta 84 and beta 155 in an (alpha beta) unit are each covalently bound to a cysteine residue through ring A. The phycourobilin chromophore is bound to cysteine beta 50 by ring A and bound to cysteine beta 61 by ring D. The ring A and ring D of phycourobilin deviate from the conjugate plane formed by ring B and ring C and the four rings form a boat-shaped structure. R-PE contains a 34 kDa gamma subunit that is assumed to lie in the central channel of the molecular disc (alpha 2 beta 2)3. The energy transfer and relationship between cysteine residues and chromophores are discussed.


    Related Citations: 
    • Crystal Structure of R-Phycoerythrin from Polysiphonia Urceolata at 0.5Nm Resolution
      Chang, W.R., Wan, Z.L., Jiang, T., Zhang, J.P., Song, H.W., Wang, S.G., Gui, L.L., Liang, D.C., Zhu, J.C., Yang, Z.X.
      (1995) Prog Nat Sci 5: 202

    Organizational Affiliation

    National Laboratory of Biomacromolecules, Chinese Academy of Sciences, Beijing, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
R-PHYCOERYTHRIN AK164Polysiphonia urceolataMutation(s): 0 
Gene Names: cpeArpeA
Find proteins for P84861 (Polysiphonia urceolata)
Explore P84861 
Go to UniProtKB:  P84861
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
R-PHYCOERYTHRIN BL177Polysiphonia urceolataMutation(s): 0 
Gene Names: cpeBrpeB
Find proteins for P84862 (Polysiphonia urceolata)
Explore P84862 
Go to UniProtKB:  P84862
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.180 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 189.8α = 90
b = 189.8β = 90
c = 60.1γ = 120
Software Package:
Software NamePurpose
XENGENdata collection
X-PLORmodel building
X-PLORrefinement
XENGENdata reduction
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-07-29
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance