3ST0

Engineered medium-affinity halide-binding protein derived from YFP: halide-free


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.19 Å
  • R-Value Free: 0.166 
  • R-Value Work: 0.141 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Visualization of Synaptic Inhibition with an Optogenetic Sensor Developed by Cell-Free Protein Engineering Automation.

Grimley, J.S.Li, L.Wang, W.Wen, L.Beese, L.S.Hellinga, H.W.Augustine, G.J.

(2013) J.Neurosci. 33: 16297-16309

  • DOI: 10.1523/JNEUROSCI.4616-11.2013
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We describe an engineered fluorescent optogenetic sensor, SuperClomeleon, that robustly detects inhibitory synaptic activity in single, cultured mouse neurons by reporting intracellular chloride changes produced by exogenous GABA or inhibitory synapt ...

    We describe an engineered fluorescent optogenetic sensor, SuperClomeleon, that robustly detects inhibitory synaptic activity in single, cultured mouse neurons by reporting intracellular chloride changes produced by exogenous GABA or inhibitory synaptic activity. Using a cell-free protein engineering automation methodology that bypasses gene cloning, we iteratively constructed, produced, and assayed hundreds of mutations in binding-site residues to identify improvements in Clomeleon, a first-generation, suboptimal sensor. Structural analysis revealed that these improvements involve halide contacts and distant side chain rearrangements. The development of optogenetic sensors that respond to neural activity enables cellular tracking of neural activity using optical, rather than electrophysiological, signals. Construction of such sensors using in vitro protein engineering establishes a powerful approach for developing new probes for brain imaging.


    Organizational Affiliation

    Department of Biochemistry and Department of Neurobiology, Duke University Medical Center, Durham, North Carolina 27710, Center for Functional Connectomics, Korea Institute of Science and Technology, Seongbukgu, Seoul, 136-791 Republic of Korea, Program in Neuroscience and Behavioral Disorders, Duke-NUS Graduate Medical School, Singapore 169857, Singapore, A*STAR/Duke-NUS Neuroscience Research Partnership, Proteos, Singapore 138673, Singapore, Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 637553, Singapore, and Institute of Molecular and Cell Biology, Singapore 138673, Singapore.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Green fluorescent protein
A
260Aequorea victoriaMutation(s): 6 
Gene Names: GFP
Find proteins for P42212 (Aequorea victoria)
Go to UniProtKB:  P42212
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FMT
Query on FMT

Download SDF File 
Download CCD File 
A
FORMIC ACID
C H2 O2
BDAGIHXWWSANSR-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CR2
Query on CR2
A
L-PEPTIDE LINKINGC13 H13 N3 O4GLY, TYR, GLY
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.19 Å
  • R-Value Free: 0.166 
  • R-Value Work: 0.141 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 51.026α = 90.00
b = 62.964β = 90.00
c = 69.078γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
REFMACphasing
DENZOdata reduction
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHENIXrefinement
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-07-11
    Type: Initial release
  • Version 1.1: 2013-10-23
    Type: Database references
  • Version 1.2: 2017-11-08
    Type: Refinement description