4N6U

Adhiron: a stable and versatile peptide display scaffold - truncated adhiron


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.187 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Adhiron: a stable and versatile peptide display scaffold for molecular recognition applications.

Tiede, C.Tang, A.A.Deacon, S.E.Mandal, U.Nettleship, J.E.Owen, R.L.George, S.E.Harrison, D.J.Owens, R.J.Tomlinson, D.C.McPherson, M.J.

(2014) Protein Eng Des Sel 27: 145-155

  • DOI: https://doi.org/10.1093/protein/gzu007
  • Primary Citation of Related Structures:  
    4N6T, 4N6U

  • PubMed Abstract: 

    We have designed a novel non-antibody scaffold protein, termed Adhiron, based on a phytocystatin consensus sequence. The Adhiron scaffold shows high thermal stability (Tm ca. 101°C), and is expressed well in Escherichia coli. We have determined the X-ray crystal structure of the Adhiron scaffold to 1.75 Å resolution revealing a compact cystatin-like fold. We have constructed a phage-display library in this scaffold by insertion of two variable peptide regions. The library is of high quality and complexity comprising 1.3 × 10(10) clones. To demonstrate library efficacy, we screened against the yeast Small Ubiquitin-like Modifier (SUMO). In selected clones, variable region 1 often contained sequences homologous to the known SUMO interactive motif (V/I-X-V/I-V/I). Four Adhirons were further characterised and displayed low nanomolar affinities and high specificity for yeast SUMO with essentially no cross-reactivity to human SUMO protein isoforms. We have identified binders against >100 target molecules to date including as examples, a fibroblast growth factor (FGF1), platelet endothelial cell adhesion molecule (PECAM-1; CD31), the SH2 domain Grb2 and a 12-aa peptide. Adhirons are highly stable and well expressed allowing highly specific binding reagents to be selected for use in molecular recognition applications.


  • Organizational Affiliation

    Biomedical Health Research Centre, BioScreening Technology Group, University of Leeds, Leeds LS2 9JT, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Adhiron79synthetic constructMutation(s): 0 
Gene Names: PHYTOCYSTATIN
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.187 
  • Space Group: P 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 36.373α = 90
b = 36.373β = 90
c = 59.243γ = 90
Software Package:
Software NamePurpose
GDAdata collection
PHASERphasing
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-04-09
    Type: Initial release
  • Version 1.1: 2014-05-14
    Changes: Database references
  • Version 1.2: 2024-02-28
    Changes: Data collection, Database references