Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 105815.02 
• Atom Count: 7282 
• Residue Count: 904 
• Unique protein chains: 1

2VVI

IrisFP fluorescent protein in its green form, trans conformation

• DOI: 10.2210/pdb2VVI/pdb

• Classification: FLUORESCENT PROTEIN
• Organism(s): Lobophyllia hemprichii
• Expression System: Escherichia coli
• Mutation(s): 2 


• Deposited: 2008-06-09 Released: 2008-11-11 
• Deposition Author(s): Adam, V., Lelimousin, M., Boehme, S., Desfonds, G., Nienhaus, K., Field, M.J., Wiedenmann, J., McSweeney, S., Nienhaus, G.U., Bourgeois, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Free: 0.251 
• R-Value Work: 0.193 

Literature

Structural Characterization of Irisfp, an Optical Highlighter Undergoing Multiple Photo-Induced Transformations.

Adam, V., Lelimousin, M., Boehme, S., Desfonds, G., Nienhaus, K., Field, M.J., Wiedenmann, J., Mcsweeney, S., Nienhaus, G.U., Bourgeois, D.

(2008) Proc.Natl.Acad.Sci.USA 105: 18343

• PubMed: 19017808 
• DOI: 10.1073/pnas.0805949105
• Primary Citation of Related Structures:  
  2VVJ, 2VVH


• PubMed Abstract: 
  

Photoactivatable fluorescent proteins (FPs) are powerful fluorescent highlighters in live cell imaging and offer perspectives for optical nanoscopy and the development of biophotonic devices. Two types of photoactivation are currently being distinguished, reversible photoswitching between fluorescent and nonfluorescent forms and irreversible photoconversion. Here, we have combined crystallography and (in crystallo) spectroscopy to characterize the Phe-173-Ser mutant of the tetrameric variant of EosFP, named IrisFP, which incorporates both types of phototransformations. In its green fluorescent state, IrisFP displays reversible photoswitching, which involves cis-trans isomerization of the chromophore. Like its parent protein EosFP, IrisFP also photoconverts irreversibly to a red-emitting state under violet light because of an extension of the conjugated pi-electron system of the chromophore, accompanied by a cleavage of the polypeptide backbone. The red form of IrisFP exhibits a second reversible photoswitching process, which may also involve cis-trans isomerization of the chromophore. Therefore, IrisFP displays altogether 3 distinct photoactivation processes. The possibility to engineer and precisely control multiple phototransformations in photoactivatable FPs offers exciting perspectives for the extension of the fluorescent protein toolkit.

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Organizational Affiliation: 

European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, BP 220, 38043 Grenoble Cedex, France.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
GREEN TO RED PHOTOCONVERTIBLE GPF-LIKE PROTEIN EOSFP	A, B, C, D	228	Lobophyllia hemprichii	Mutation(s): 2
Find proteins for Q5S6Z9 (Lobophyllia hemprichii) Go to UniProtKB:  Q5S6Z9

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
SO4	A, B, C, D	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
SO3	A, B, C, D	SULFITE ION O3 S LSNNMFCWUKXFEE-UHFFFAOYSA-L

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
CR8	A, B, C, D	L-PEPTIDE LINKING	C17 H16 N5 O4		HIS, TYR, GLY

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Free: 0.251 
• R-Value Work: 0.193 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 81.310	α = 90.00
b = 96.380	β = 90.00
c = 140.610	γ = 90.00

Software Package:

Software Name	Purpose
XDS	data reduction
PHASER	phasing
REFMAC	refinement
XSCALE	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-06-09 
• Released Date: 2008-11-11 
• Deposition Author(s): Adam, V., Lelimousin, M., Boehme, S., Desfonds, G., Nienhaus, K., Field, M.J., Wiedenmann, J., McSweeney, S., Nienhaus, G.U., Bourgeois, D.

Revision History 

• Version 1.0: 2008-11-11
  Type: Initial release
• Version 1.1: 2011-05-08
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2019-03-06
  Type: Data collection, Derived calculations, Experimental preparation, Other
• Version 1.4: 2019-10-23
  Type: Data collection, Database references, Other