5F1E

Apo protein of Sandercyanin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Blue protein with red fluorescence

Ghosh, S.Yu, C.L.Ferraro, D.J.Sudha, S.Pal, S.K.Schaefer, W.F.Gibson, D.T.Ramaswamy, S.

(2016) Proc.Natl.Acad.Sci.USA 113: 11513-11518

  • DOI: 10.1073/pnas.1525622113
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The walleye (Sander vitreus) is a golden yellow fish that inhabits the Northern American lakes. The recent sightings of the blue walleye and the correlation of its sighting to possible increased UV radiation have been proposed earlier. The underlying ...

    The walleye (Sander vitreus) is a golden yellow fish that inhabits the Northern American lakes. The recent sightings of the blue walleye and the correlation of its sighting to possible increased UV radiation have been proposed earlier. The underlying molecular basis of its adaptation to increased UV radiation is the presence of a protein (Sandercyanin)-ligand complex in the mucus of walleyes. Degradation of heme by UV radiation results in the formation of Biliverdin IXα (BLA), the chromophore bound to Sandercyanin. We show that Sandercyanin is a monomeric protein that forms stable homotetramers on addition of BLA to the protein. A structure of the Sandercyanin-BLA complex, purified from the fish mucus, reveals a glycosylated protein with a lipocalin fold. This protein-ligand complex absorbs light in the UV region (λmax of 375 nm) and upon excitation at this wavelength emits in the red region (λmax of 675 nm). Unlike all other known biliverdin-bound fluorescent proteins, the chromophore is noncovalently bound to the protein. We provide here a molecular rationale for the observed spectral properties of Sandercyanin.


    Organizational Affiliation

    National Center for Biological Sciences, Tata Institute of Fundamental Research, Bangalore, India 560065.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Sandercyanin Fluorescent Protein
A, B
183N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.197 
  • Space Group: P 63 2 2
Unit Cell:
Length (Å)Angle (°)
a = 158.764α = 90.00
b = 158.764β = 90.00
c = 84.795γ = 120.00
Software Package:
Software NamePurpose
d*TREKdata scaling
d*TREKphasing
PHENIXrefinement
iMOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-09-28
    Type: Initial release
  • Version 1.1: 2016-10-26
    Type: Database references