Highly pH-resistant long stokes-shift, red fluorescent protein mCRISPRed

Experimental Data Snapshot

  • Resolution: 1.75 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.205 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Targeted In Situ Protein Diversification and Intra-organelle Validation in Mammalian Cells.

Erdogan, M.Fabritius, A.Basquin, J.Griesbeck, O.

(2020) Cell Chem Biol 27: 610-621.e5

  • DOI: https://doi.org/10.1016/j.chembiol.2020.02.004
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Engineered proteins must be phenotypically selected for function in the appropriate physiological context. Here, we present a versatile approach that allows generating panels of mammalian cells that express diversified heterologous protein libraries in the cytosol or subcellular compartments under stable conditions and in a single-variant-per-cell manner. To this end we adapt CRISPR/Cas9 editing technology to diversify targeted stretches of a protein of interest in situ. We demonstrate the utility of the approach by in situ engineering and intra-lysosome specific selection of an extremely pH-resistant long Stokes shift red fluorescent protein variant. Tailoring properties to specific conditions of cellular sub-compartments or organelles of mammalian cells can be an important asset to optimize various proteins, protein-based tools, and biosensors for distinct functions.

  • Organizational Affiliation

    Tools for Bio-Imaging, Max-Planck-Institut für Neurobiologie, Am Klopferspitz 18, Martinsried 82152, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Red fluorescent protein eqFP611
A, B, C, D
219Entacmaea quadricolorMutation(s): 1 
Find proteins for Q8ISF8 (Entacmaea quadricolor)
Explore Q8ISF8 
Go to UniProtKB:  Q8ISF8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8ISF8
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.75 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.205 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.02α = 90
b = 96.861β = 90
c = 232.922γ = 90
Software Package:
Software NamePurpose
XDSdata processing
Aimlessdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-02-05
    Type: Initial release
  • Version 1.1: 2020-03-18
    Changes: Database references
  • Version 1.2: 2020-06-03
    Changes: Database references
  • Version 1.3: 2024-01-24
    Changes: Data collection, Database references, Refinement description