5WJ4

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.631 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.164 

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:  

  • 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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Green fluorescent protein
A, B
241Aequorea victoriaMutation(s): 14 
Gene Names: GFP
Find proteins for P42212 (Aequorea victoria)
Go to UniProtKB:  P42212
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CR2
Query on CR2
A, B
L-PEPTIDE LINKINGC13 H13 N3 O4GLY, TYR, GLY
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.631 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.164 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 134.570α = 90.00
b = 134.570β = 90.00
c = 69.090γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
Aimlessdata scaling
PHASERphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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