Crystal Structure of a Superfolder GFP Mutant K26C Disulfide Dimer, P 21 21 21 Space Group

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.169 

wwPDB Validation   3D Report Full Report

This is version 1.5 of the entry. See complete history


A Suite of Engineered GFP Molecules for Oligomeric Scaffolding.

Leibly, D.J.Arbing, M.A.Pashkov, I.DeVore, N.Waldo, G.S.Terwilliger, T.C.Yeates, T.O.

(2015) Structure 23: 1754-1768

  • DOI: https://doi.org/10.1016/j.str.2015.07.008
  • Primary Citation of Related Structures:  
    4W69, 4W6A, 4W6B, 4W6C, 4W6D, 4W6F, 4W6G, 4W6H, 4W6I, 4W6J, 4W6K, 4W6L, 4W6M, 4W6N, 4W6O, 4W6P, 4W6R, 4W6S, 4W6T, 4W6U, 4W72, 4W73, 4W74, 4W75, 4W76, 4W77, 4W7A, 4W7C, 4W7D, 4W7E, 4W7F, 4W7R, 4W7X

  • PubMed Abstract: 

    Applications ranging from synthetic biology to protein crystallization could be advanced by facile systems for connecting multiple proteins together in predefined spatial relationships. One approach to this goal is to engineer many distinct assembly forms of a single carrier protein or scaffold, to which other proteins of interest can then be readily attached. In this work we chose GFP as a scaffold and engineered many alternative oligomeric forms, driven by either specific disulfide bond formation or metal ion addition. We generated a wide range of spatial arrangements of GFP subunits from 11 different oligomeric variants, and determined their X-ray structures in a total of 33 distinct crystal forms. Some of the oligomeric GFP variants show geometric polymorphism depending on conditions, while others show considerable geometric rigidity. Potential future applications of this system are discussed.

  • Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA; UCLA-DOE Institute of Genomics and Proteomics, University of California, Los Angeles, CA 90095, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
fluorescent protein K26C
A, B
234synthetic constructMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on CRO
A, B
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.169 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.151α = 90
b = 90.356β = 90
c = 102.83γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM098177

Revision History  (Full details and data files)

  • Version 1.0: 2015-02-18
    Type: Initial release
  • Version 1.1: 2016-01-27
    Changes: Database references
  • Version 1.2: 2017-09-27
    Changes: Author supporting evidence, Database references, Derived calculations
  • Version 1.3: 2019-12-25
    Changes: Author supporting evidence
  • Version 1.4: 2023-09-27
    Changes: Data collection, Database references, Derived calculations, Refinement description
  • Version 1.5: 2023-11-15
    Changes: Data collection