1TCO

TERNARY COMPLEX OF A CALCINEURIN A FRAGMENT, CALCINEURIN B, FKBP12 AND THE IMMUNOSUPPRESSANT DRUG FK506 (TACROLIMUS)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.195 

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This is version 1.2 of the entry. See complete history. 


Literature

X-ray structure of calcineurin inhibited by the immunophilin-immunosuppressant FKBP12-FK506 complex.

Griffith, J.P., Kim, J.L., Kim, E.E., Sintchak, M.D., Thomson, J.A., Fitzgibbon, M.J., Fleming, M.A., Caron, P.R., Hsiao, K., Navia, M.A.

(1995) Cell 82: 507-522

  • DOI: 10.1016/0092-8674(95)90439-5
  • Primary Citation of Related Structures:  
    1TCO

  • PubMed Abstract: 

    • The X-ray structure of the ternary complex of a calcineurin A fragment, calcineurin B, FKBP12, and the immunosuppressant drug FK506 (also known as tacrolimus) has been determined at 2.5 A resolution, providing a description of how FK506 functions at the ...

    The X-ray structure of the ternary complex of a calcineurin A fragment, calcineurin B, FKBP12, and the immunosuppressant drug FK506 (also known as tacrolimus) has been determined at 2.5 A resolution, providing a description of how FK506 functions at the atomic level. In the structure, the FKBP12-FK506 binary complex does not contact the phosphatase active site on calcineurin A that is more than 10 A removed. Instead, FKBP12-FK506 is so positioned that it can inhibit the dephosphorylation of its macromolecular substrates by physically hindering their approach to the active site. The ternary complex described here represents the three-dimensional structure of a Ser/Thr protein phosphatase and provides a structural basis for understanding calcineurin inhibition by FKBP12-FK506.

    Organizational Affiliation: 

    Vertex Pharmaceuticals, Incorporated, Cambridge, Massachusetts 02139-4211, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SERINE/THREONINE PHOSPHATASE B2 A375Bos taurusMutation(s): 0 
Gene Names: PPP3CA
EC: 3.1.3.16
Find proteins for P48452 (Bos taurus)
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Go to UniProtKB:  P48452
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
SERINE/THREONINE PHOSPHATASE B2 B169Bos taurusMutation(s): 0 
Gene Names: PPP3R1, CNA2, CNB
EC: 3.1.3.16
Find proteins for P63099 (Bos taurus)
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Go to UniProtKB:  P63099
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
FK506-BINDING PROTEIN C107Bos taurusMutation(s): 0 
Gene Names: FKBP1A, FKBP1
EC: 5.2.1.8
Find proteins for P18203 (Bos taurus)
Explore P18203 
Go to UniProtKB:  P18203
Protein Feature View
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  • Reference Sequence
Small Molecules
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
FK5Kd:  0.20000000298023224   nM  BindingDB
FK5Kd:  20   nM  BindingDB
FK5IC50:  14   nM  BindingDB
FK5Ki:  0.4000000059604645   nM  BindingDB
FK5IC50:  15   nM  BindingDB
FK5IC50:  1000   nM  BindingDB
FK5IC50:  2.299999952316284   nM  BindingDB
FK5EC50:  0.8999999761581421   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.195 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.05α = 90
b = 94.43β = 90
c = 116.76γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-02-12
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance