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Related Experiment Videos

Calcineurin-immunosuppressor complexes

B L Stoddard1, K E Flick

  • 1Fred Hutchinson Cancer Research Center, Seattle, Washington 98104-2092, USA. bstoddard@fred.fhcrc.org

Current Opinion in Structural Biology
|December 1, 1996
PubMed
Summary
This summary is machine-generated.

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Crystal structures reveal how calcineurin (protein phosphatase 2B) is inhibited. These findings explain the mechanism of immunosuppressant drugs like FK506 by showing how they bind to calcineurin via FKBP12.

Area of Science:

  • Biochemistry
  • Structural Biology
  • Pharmacology

Background:

  • Calcineurin (protein phosphatase 2B) is a key enzyme in T-cell activation.
  • Understanding calcineurin's structure is crucial for developing immunosuppressive therapies.

Purpose of the Study:

  • To determine the crystal structures of calcineurin in its free state and complexed with FKBP12/FK506.
  • To elucidate the structural basis of calcineurin inhibition by FKBP12/FK506.

Main Methods:

  • X-ray crystallography was used to solve the crystal structures.
  • Comparative analysis of calcineurin's core elements with other phosphatases.

Main Results:

  • Crystal structures of free calcineurin and its complex with FKBP12/FK506 were obtained.

Related Experiment Videos

  • Calcineurin shares core structural elements with Ser/Thr phosphatase 1 and purple acid phosphatase.
  • The structures illustrate the formation of a ternary complex mediating inhibition.

    • Conclusions:

    • The solved structures provide a detailed molecular basis for calcineurin inhibition.
    • This structural insight is vital for the rational design of novel immunosuppressants.
    • The findings enhance our understanding of phosphatase function and regulation.