4TZA

TGP, an extremely thermostable green fluorescent protein created by structure-guided surface engineering


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.175 

wwPDB Validation   3D Report Full Report


This is version 2.1 of the entry. See complete history


Literature

Thermal green protein, an extremely stable, nonaggregating fluorescent protein created by structure-guided surface engineering.

Close, D.W.Paul, C.D.Langan, P.S.Wilce, M.C.Traore, D.A.Halfmann, R.Rocha, R.C.Waldo, G.S.Payne, R.J.Rucker, J.B.Prescott, M.Bradbury, A.R.

(2015) Proteins 83: 1225-1237

  • DOI: https://doi.org/10.1002/prot.24699
  • Primary Citation of Related Structures:  
    4TZA, 4TZG

  • PubMed Abstract: 

    In this article, we describe the engineering and X-ray crystal structure of Thermal Green Protein (TGP), an extremely stable, highly soluble, non-aggregating green fluorescent protein. TGP is a soluble variant of the fluorescent protein eCGP123, which despite being highly stable, has proven to be aggregation-prone. The X-ray crystal structure of eCGP123, also determined within the context of this paper, was used to carry out rational surface engineering to improve its solubility, leading to TGP. The approach involved simultaneously eliminating crystal lattice contacts while increasing the overall negative charge of the protein. Despite intentional disruption of lattice contacts and introduction of high entropy glutamate side chains, TGP crystallized readily in a number of different conditions and the X-ray crystal structure of TGP was determined to 1.9 Å resolution. The structural reasons for the enhanced stability of TGP and eCGP123 are discussed. We demonstrate the utility of using TGP as a fusion partner in various assays and significantly, in amyloid assays in which the standard fluorescent protein, EGFP, is undesirable because of aberrant oligomerization.


  • Organizational Affiliation

    Bioscience Division, Los Alamos National Laboratory, Los Alamos, New Mexico.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Fluorescent ProteinA [auth C],
B [auth A],
C [auth B],
D
249synthetic constructMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
CRQ
Query on CRQ
A [auth C],
B [auth A],
C [auth B],
D
L-PEPTIDE LINKINGC16 H16 N4 O5GLN, TYR, GLY
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.175 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 94.1999α = 90
b = 141.22β = 90
c = 69.0897γ = 90
Software Package:
Software NamePurpose
HKL-3000data collection
iMOSFLMdata reduction
SCALAdata scaling
Cootmodel building
PHENIXphasing
PHENIXrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-10-22
    Type: Initial release
  • Version 1.1: 2014-10-29
    Changes: Database references
  • Version 1.2: 2015-02-04
    Changes: Derived calculations
  • Version 1.3: 2015-06-03
    Changes: Database references
  • Version 1.4: 2016-02-17
    Changes: Data collection, Database references
  • Version 2.0: 2023-11-15
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations
  • Version 2.1: 2024-10-16
    Changes: Structure summary