4NXE

Crystal structure of iLOV-I486(2LT) at pH 6.5


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.207 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Significant expansion of fluorescent protein sensing ability through the genetic incorporation of superior photo-induced electron-transfer quenchers.

Liu, X.Jiang, L.Li, J.Wang, L.Yu, Y.Zhou, Q.Lv, X.Gong, W.Lu, Y.Wang, J.

(2014) J Am Chem Soc 136: 13094-13097

  • DOI: https://doi.org/10.1021/ja505219r
  • Primary Citation of Related Structures:  
    4NX2, 4NXB, 4NXE, 4NXF, 4NXG

  • PubMed Abstract: 

    Photo-induced electron transfer (PET) is ubiquitous for photosynthesis and fluorescent sensor design. However, genetically coded PET sensors are underdeveloped, due to the lack of methods to site-specifically install PET probes on proteins. Here we describe a family of acid and Mn(III) turn-on fluorescent protein (FP) sensors, named iLovU, based on PET and the genetic incorporation of superior PET quenchers in the fluorescent flavoprotein iLov. Using the iLovU PET sensors, we monitored the cytoplasmic acidification process, and achieved Mn(III) fluorescence sensing for the first time. The iLovU sensors should be applicable for studying pH changes in living cells, monitoring biogentic Mn(III) in the environment, and screening for efficient manganese peroxidase, which is highly desirable for lignin degradation and biomass conversion. Our work establishes a platform for many more protein PET sensors, facilitates the de novo design of metalloenzymes harboring redox active residues, and expands our ability to probe protein conformational dynamics.


  • Organizational Affiliation

    Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences , Chaoyang District, Beijing, 100101, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Phototropin-2
A, B
118Arabidopsis thalianaMutation(s): 6 
Gene Names: PHOT2CAV1KIN7NPL1At5g58140K21L19.6
EC: 2.7.11.1
UniProt
Find proteins for P93025 (Arabidopsis thaliana)
Explore P93025 
Go to UniProtKB:  P93025
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP93025
Sequence Annotations
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
2LT
Query on 2LT
A, B
L-PEPTIDE LINKINGC9 H9 Cl2 N O3TYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.207 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.474α = 90
b = 65.43β = 102.67
c = 49.565γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
MLPHAREphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-09-24
    Type: Initial release
  • Version 1.1: 2022-08-24
    Changes: Database references, Derived calculations
  • Version 1.2: 2023-11-08
    Changes: Data collection, Refinement description