5HKG

Total chemical synthesis, refolding and crystallographic structure of a fully active immunophilin: calstabin 2 (FKBP12.6).


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.173 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Total chemical synthesis, refolding, and crystallographic structure of fully active immunophilin calstabin 2 (FKBP12.6).

Bacchi, M.Jullian, M.Sirigu, S.Fould, B.Huet, T.Bruyand, L.Antoine, M.Vuillard, L.Ronga, L.Chavas, L.M.Nosjean, O.Ferry, G.Puget, K.Boutin, J.A.

(2016) Protein Sci 25: 2225-2242

  • DOI: 10.1002/pro.3051
  • Primary Citation of Related Structures:  
    5HKG

  • PubMed Abstract: 
  • Synthetic biology (or chemical biology) is a growing field to which the chemical synthesis of proteins, particularly enzymes, makes a fundamental contribution. However, the chemical synthesis of catalytically active proteins (enzymes) remains poorly documented because it is difficult to obtain enough material for biochemical experiments ...

    Synthetic biology (or chemical biology) is a growing field to which the chemical synthesis of proteins, particularly enzymes, makes a fundamental contribution. However, the chemical synthesis of catalytically active proteins (enzymes) remains poorly documented because it is difficult to obtain enough material for biochemical experiments. We chose calstabin, a 107-amino-acid proline isomerase, as a model. We synthesized the enzyme using the native chemical ligation approach and obtained several tens of milligrams. The polypeptide was refolded properly, and we characterized its biophysical properties, measured its catalytic activity, and then crystallized it in order to obtain its tridimensional structure after X-ray diffraction. The refolded enzyme was compared to the recombinant, wild-type enzyme. In addition, as a first step of validating the whole process, we incorporated exotic amino acids into the N-terminus. Surprisingly, none of the changes altered the catalytic activities of the corresponding mutants. Using this body of techniques, avenues are now open to further obtain enzymes modified with exotic amino acids in a way that is only barely accessible by molecular biology, obtaining detailed information on the structure-function relationship of enzymes reachable by complete chemical synthesis.


    Organizational Affiliation

    Pôle d'Expertise Biotechnologie, Chimie and Biologie, Institut de Recherches Servier, 125 Chemin de Ronde, Croissy-sur-Seine, 78290, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Peptidyl-prolyl cis-trans isomerase FKBP1B A107Homo sapiensMutation(s): 0 
Gene Names: FKBP1BFKBP12.6FKBP1LFKBP9OTK4
EC: 5.2.1.8
Find proteins for P68106 (Homo sapiens)
Explore P68106 
Go to UniProtKB:  P68106
NIH Common Fund Data Resources
PHAROS:  P68106
Protein Feature View
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  • Reference Sequence
Small Molecules
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
RAPKd:  0.20000000298023224   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.173 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.2α = 90
b = 48.61β = 90
c = 53.36γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-10-05
    Type: Initial release
  • Version 1.1: 2016-11-30
    Changes: Database references