4Q7U

Crystal structure of photoswitchable fluorescent protein PSmOrange2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.177 
  • R-Value Work: 0.148 
  • R-Value Observed: 0.149 

wwPDB Validation 3D Report Full Report



Literature

Orange Fluorescent Proteins: Structural Studies of LSSmOrange, PSmOrange and PSmOrange2.

Pletnev, S.Shcherbakova, D.M.Subach, O.M.Pletneva, N.V.Malashkevich, V.N.Almo, S.C.Dauter, Z.Verkhusha, V.V.

(2014) PLoS One 9: e99136-e99136

  • DOI: 10.1371/journal.pone.0099136
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • A structural analysis of the recently developed orange fluorescent proteins with novel phenotypes, LSSmOrange (λex/λem at 437/572 nm), PSmOrange (λex/λem at 548/565 nm and for photoconverted form at 636/662 nm) and PSmOrange2 (λex/λem at 546/561 nm a ...

    A structural analysis of the recently developed orange fluorescent proteins with novel phenotypes, LSSmOrange (λex/λem at 437/572 nm), PSmOrange (λex/λem at 548/565 nm and for photoconverted form at 636/662 nm) and PSmOrange2 (λex/λem at 546/561 nm and for photoconverted form at 619/651 nm), is presented. The obtained crystallographic structures provide an understanding of how the ensemble of a few key mutations enabled special properties of the orange FPs. While only a single Ile161Asp mutation, enabling excited state proton transfer, is critical for LSSmOrange, other substitutions provide refinement of its special properties and an exceptional 120 nm large Stokes shift. Similarly, a single Gln64Leu mutation was sufficient to cause structural changes resulting in photoswitchability of PSmOrange, and only one additional substitution (Phe65Ile), yielding PSmOrange2, was enough to greatly decrease the energy of photoconversion and increase its efficiency of photoswitching. Fluorescence of photoconverted PSmOrange and PSmOrange2 demonstrated an unexpected bathochromic shift relative to the fluorescence of classic red FPs, such as DsRed, eqFP578 and zFP574. The structural changes associated with this fluorescence shift are of considerable value for the design of advanced far-red FPs. For this reason the chromophore transformations accompanying photoconversion of the orange FPs are discussed.


    Organizational Affiliation

    Department of Anatomy and Structural Biology, Albert Einstein College of Medicine, Bronx, New York, United States of America.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PSmOrange2
A
245Discosoma sp.Mutation(s): 12 
Find proteins for D0VWW2 (Discosoma sp.)
Go to UniProtKB:  D0VWW2
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
OIM
Query on OIM
A
L-PEPTIDE LINKINGC21 H26 N4 O6ILE,GLY,TYR,GLY
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.177 
  • R-Value Work: 0.148 
  • R-Value Observed: 0.149 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.724α = 90
b = 43.874β = 94.37
c = 52.544γ = 90
Software Package:
Software NamePurpose
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-07-09
    Type: Initial release