5WJ4

Crystal structure of redox-sensitive green fluorescent protein Clover mutant roClover1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.63 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.165 

wwPDB Validation   3D Report Full Report


This is version 2.1 of the entry. See complete history


Literature

Crystal Structure of Green Fluorescent Protein Clover and Design of Clover-Based Redox Sensors.

Campbell, B.C.Petsko, G.A.Liu, C.F.

(2018) Structure 26: 225-237.e3

  • DOI: 10.1016/j.str.2017.12.006
  • Primary Citation of Related Structures:  
    5WJ3, 5WJ2, 5WJ4

  • PubMed Abstract: 
  • We have determined the crystal structure of Clover, one of the brightest fluorescent proteins, and found that its T203H/S65G mutations relative to wild-type GFP lock the critical E222 side chain in a fixed configuration that mimics the major conforme ...

    We have determined the crystal structure of Clover, one of the brightest fluorescent proteins, and found that its T203H/S65G mutations relative to wild-type GFP lock the critical E222 side chain in a fixed configuration that mimics the major conformer of that in EGFP. The resulting equilibrium shift to the predominantly deprotonated chromophore increases the extinction coefficient (EC), opposes photoactivation, and is responsible for the bathochromic shift. Clover's brightness can further be attributed to a π-π stacking interaction between H203 and the chromophore. Consistent with these observations, the Clover G65S mutant reversed the equilibrium shift, dramatically decreased the EC, and made Clover photoactivatable under conditions that activated photoactivatable GFP. Using the Clover structure, we rationally engineered a non-photoactivatable redox sensor, roClover1, and determined its structure as well as that of its parental template, roClover0.1. These high-resolution structures provide deeper insights into structure-function relationships in GFPs and may aid the development of excitation-improved ratiometric biosensors.


    Organizational Affiliation

    Helen and Robert Appel Alzheimer's Disease Research Institute and Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10021, USA. Electronic address: cel2010@med.cornell.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Green fluorescent proteinAB239Aequorea victoriaMutation(s): 15 
Gene Names: GFP
Find proteins for P42212 (Aequorea victoria)
Explore P42212 
Go to UniProtKB:  P42212
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CR2
Query on CR2
A,BL-PEPTIDE LINKINGC13 H13 N3 O4GLY, TYR, GLY
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.63 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.164 
  • R-Value Observed: 0.165 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 134.57α = 90
b = 134.57β = 90
c = 69.09γ = 90
Software Package:
Software NamePurpose
Aimlessdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-01-17
    Type: Initial release
  • Version 1.1: 2018-01-24
    Changes: Database references
  • Version 2.0: 2018-01-31
    Changes: Advisory, Atomic model, Database references, Structure summary
  • Version 2.1: 2018-02-14
    Changes: Database references