3LVD

Crystal structure of GFP-like protein aceGFP_G222E (A. coerulescens). UV-photoconverted green form.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.160 
  • R-Value Observed: 0.161 

wwPDB Validation   3D Report Full Report


This is version 2.1 of the entry. See complete history


Literature

Structural evidence for a dehydrated intermediate in green fluorescent protein chromophore biosynthesis.

Pletneva, N.V.Pletnev, V.Z.Lukyanov, K.A.Gurskaya, N.G.Goryacheva, E.A.Martynov, V.I.Wlodawer, A.Dauter, Z.Pletnev, S.

(2010) J Biol Chem 285: 15978-15984

  • DOI: https://doi.org/10.1074/jbc.M109.092320
  • Primary Citation of Related Structures:  
    3LVA, 3LVC, 3LVD

  • PubMed Abstract: 

    The acGFPL is the first-identified member of a novel, colorless and non-fluorescent group of green fluorescent protein (GFP)-like proteins. Its mutant aceGFP, with Gly replacing the invariant catalytic Glu-222, demonstrates a relatively fast maturation rate and bright green fluorescence (lambda(ex) = 480 nm, lambda(em) = 505 nm). The reverse G222E single mutation in aceGFP results in the immature, colorless variant aceGFP-G222E, which undergoes irreversible photoconversion to a green fluorescent state under UV light exposure. Here we present a high resolution crystallographic study of aceGFP and aceGFP-G222E in the immature and UV-photoconverted states. A unique and striking feature of the colorless aceGFP-G222E structure is the chromophore in the trapped intermediate state, where cyclization of the protein backbone has occurred, but Tyr-66 still stays in the native, non-oxidized form, with C(alpha) and C(beta) atoms in the sp(3) hybridization. This experimentally observed immature aceGFP-G222E structure, characterized by the non-coplanar arrangement of the imidazolone and phenolic rings, has been attributed to one of the intermediate states in the GFP chromophore biosynthesis. The UV irradiation (lambda = 250-300 nm) of aceGFP-G222E drives the chromophore maturation further to a green fluorescent state, characterized by the conventional coplanar bicyclic structure with the oxidized double Tyr-66 C(alpha)=C(beta) bond and the conjugated system of pi-electrons. Structure-based site-directed mutagenesis has revealed a critical role of the proximal Tyr-220 in the observed effects. In particular, an alternative reaction pathway via Tyr-220 rather than conventional wild type Glu-222 has been proposed for aceGFP maturation.


  • Organizational Affiliation

    Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 GSP, Moscow V-437, Russia. pletnevs@mail.nih.gov


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Green fluorescent protein
A, B
236Aequorea coerulescensMutation(s): 4 
UniProt
Find proteins for Q6YGZ0 (Aequorea coerulescens)
Explore Q6YGZ0 
Go to UniProtKB:  Q6YGZ0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6YGZ0
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.160 
  • R-Value Observed: 0.161 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.472α = 90
b = 80.202β = 90
c = 95.37γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
SERGUIdata collection
HKL-2000data reduction
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-03-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-08
    Changes: Refinement description
  • Version 1.3: 2021-10-13
    Changes: Database references, Derived calculations
  • Version 2.0: 2023-11-15
    Changes: Advisory, Atomic model, Data collection, Derived calculations
  • Version 2.1: 2024-10-09
    Changes: Structure summary