EngBF DARPin Fusion 4b H14

Experimental Data Snapshot

  • Resolution: 2.60 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 

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This is version 1.2 of the entry. See complete history


Structural analysis of biological targets by host:guest crystal lattice engineering.

Ernst, P.Pluckthun, A.Mittl, P.R.E.

(2019) Sci Rep 9: 15199-15199

  • DOI: https://doi.org/10.1038/s41598-019-51017-y
  • Primary Citation of Related Structures:  
    6QEP, 6QEV, 6QFK, 6QFO, 6SH9

  • PubMed Abstract: 

    To overcome the laborious identification of crystallisation conditions for protein X-ray crystallography, we developed a method where the examined protein is immobilised as a guest molecule in a universal host lattice. We applied crystal engineering to create a generic crystalline host lattice under reproducible, predefined conditions and analysed the structures of target guest molecules of different size, namely two 15-mer peptides and green fluorescent protein (sfGFP). A fusion protein with an N-terminal endo-α-N-acetylgalactosaminidase (EngBF) domain and a C-terminal designed ankyrin repeat protein (DARPin) domain establishes the crystal lattice. The target is recruited into the host lattice, always in the same crystal form, through binding to the DARPin. The target structures can be determined rapidly from difference Fourier maps, whose quality depends on the size of the target and the orientation of the DARPin.

  • Organizational Affiliation

    Department of Biochemistry, University of Zürich, Winterthurerstrasse 190, CH-8057, Zürich, Switzerland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PEGA domain-containing protein,EngBF-DARPin Fusion 4b H141,354Bifidobacterium longumMutation(s): 0 
Gene Names: DXD52_03130
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.60 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 
  • Space Group: P 65
  • Diffraction Data: https://doi.org/10.18430/m36qep
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 192.69α = 90
b = 192.69β = 90
c = 123.94γ = 120
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-11-06
    Type: Initial release
  • Version 1.1: 2020-04-22
    Changes: Database references
  • Version 1.2: 2024-05-15
    Changes: Data collection, Database references, Derived calculations