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)) AK164Griffithsia monilisMutation(s): 0 
Gene Names: cpeArpeA
Find proteins for O36005 (Griffithsia monilis)
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Go to UniProtKB:  O36005
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (RHODOPHYTAN PHYCOERYTHRIN (BETA CHAIN)) BL177Griffithsia 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