Crystal structure of oxidized Symerythrin from Cyanophora paradoxa

Experimental Data Snapshot

  • Resolution: 1.20 Å
  • R-Value Free: 0.125 
  • R-Value Work: 0.101 
  • R-Value Observed: 0.102 

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This is version 1.2 of the entry. See complete history


A diiron protein autogenerates a valine-phenylalanine cross-link.

Cooley, R.B.Rhoads, T.W.Arp, D.J.Karplus, P.A.

(2011) Science 332: 929-929

  • DOI: https://doi.org/10.1126/science.1205687
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    All known internal covalent cross-links in proteins involve functionalized groups having oxygen, nitrogen, or sulfur atoms present to facilitate their formation. Here, we report a carbon-carbon cross-link between two unfunctionalized side chains. This valine-phenyalanine cross-link, produced in an oxygen-dependent reaction, is generated by its own carboxylate-bridged diiron center and serves to stabilize the metallocenter. This finding opens the door to new types of posttranslational modifications, and it demonstrates new catalytic potential of diiron centers.

  • Organizational Affiliation

    Department of Biochemistry and Biophysics, 2011 Agriculture and Life Sciences Building, Oregon State University, Corvallis, OR 97331, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
179Cyanophora paradoxaMutation(s): 0 
Gene Names: ORF180
Find proteins for P48329 (Cyanophora paradoxa)
Explore P48329 
Go to UniProtKB:  P48329
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP48329
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.20 Å
  • R-Value Free: 0.125 
  • R-Value Work: 0.101 
  • R-Value Observed: 0.102 
  • Space Group: P 32
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.593α = 90
b = 81.593β = 90
c = 46.277γ = 120
Software Package:
Software NamePurpose
SCALAdata scaling
PDB_EXTRACTdata extraction
ADSCdata collection
MOSFLMdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-05-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description