1B8D

CRYSTAL STRUCTURE OF A PHYCOUROBILIN-CONTAINING PHYCOERYTHRIN

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.175 

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This is version 1.2 of the entry. See complete history. 


Literature

Crystal structure of a phycourobilin-containing phycoerythrin at 1.90-A resolution.

Ritter, S., Hiller, R.G., Wrench, P.M., Welte, W., Diederichs, K.

(1999) J Struct Biol 126: 86-97

  • DOI: 10.1006/jsbi.1999.4106
  • Primary Citation of Related Structures:  
    1B8D

  • PubMed Abstract: 

    • The structure of R-phycoerythrin (R-PE) from the red alga Griffithsia monilis was solved at 1.90-A resolution by molecular replacement, using the atomic coordinates of cyanobacterial phycocyanin from Fremyella diplosiphon as a model. The crystallographic R factor for the final model is 17 ...

    The structure of R-phycoerythrin (R-PE) from the red alga Griffithsia monilis was solved at 1.90-A resolution by molecular replacement, using the atomic coordinates of cyanobacterial phycocyanin from Fremyella diplosiphon as a model. The crystallographic R factor for the final model is 17.5% (Rfree 22.7%) for reflections in the range 100-1.90 A. The model consists of an (alphabeta)2 dimer with an internal noncrystallographic dyad and a fragment of the gamma-polypeptide. The alpha-polypeptide (164 amino acid residues) has two covalently bound phycoerythrobilins at positions alpha82 and alpha139. The beta-polypeptide (177 residues) has two phycoerythrobilins bound to residues beta82 and beta158 and one phycourobilin covalently attached to rings A and D at residues beta50 and beta61, respectively. The electron density of the gamma-polypeptide is mostly averaged out by threefold crystallographic symmetry, but a dipeptide (Gly-Tyr) and one single Tyr could be modeled. These two tyrosine residues of the gamma-polypeptide are in close proximity to the phycoerythrobilins at position beta82 of two symmetry-related beta-polypeptides and are related by the same noncrystallographic dyad as the (alphabeta)2 dimer. Possible energy transfer pathways are discussed briefly.

    Organizational Affiliation: 

    Institut für Biophysik und Strahlenbiologie, Universität Freiburg, Albertstrasse 23, Freiburg, D-79104, Germany.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (RHODOPHYTAN PHYCOERYTHRIN (ALPHA CHAIN)) A, K164Griffithsia monilisMutation(s): 0 
Gene Names: cpeA, rpeA
Find proteins for O36005 (Griffithsia monilis)
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Go to UniProtKB:  O36005
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (RHODOPHYTAN PHYCOERYTHRIN (BETA CHAIN)) B, L177Griffithsia monilisMutation(s): 0 
Gene Names: cpeB
Find proteins for O36004 (Griffithsia monilis)
Explore O36004 
Go to UniProtKB:  O36004
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (RHODOPHYTAN PHYCOERYTHRIN (GAMMA CHAIN)) G6Griffithsia monilisMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.175 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 187.35α = 90
b = 187.35β = 90
c = 59.31γ = 120
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
XDSdata reduction
XSCALEdata scaling
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-02-18
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance