1M63

Crystal structure of calcineurin-cyclophilin-cyclosporin shows common but distinct recognition of immunophilin-drug complexes


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.322 
  • R-Value Work: 0.260 
  • R-Value Observed: 0.260 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Crystal Structure of Calcineurin-Cyclophilin-Cyclosporin Shows Common But Distinct Recognition of Immunophilin-Drug Complexes

Huai, Q.Kim, H.-Y.Liu, Y.Zhao, Y.Mondragon, A.Liu, J.O.Ke, H.

(2002) Proc Natl Acad Sci U S A 99: 12037

  • DOI: 10.1073/pnas.192206699
  • Primary Citation of Related Structures:  
    1M63

  • PubMed Abstract: 
  • Calcineurin, a Ca2+/calmodulin-dependent protein phosphatase, is the common target for two immunophilin-immunosuppressant complexes, cyclophilin A-cyclosporin A (CyPA-CsA) and FKBP-FK506. How the two structurally distinct immunophilin-drug complexes bind the same target has remained unknown ...

    Calcineurin, a Ca2+/calmodulin-dependent protein phosphatase, is the common target for two immunophilin-immunosuppressant complexes, cyclophilin A-cyclosporin A (CyPA-CsA) and FKBP-FK506. How the two structurally distinct immunophilin-drug complexes bind the same target has remained unknown. We report the crystal structure of calcineurin (CN) in complex with CyPA-CsA at 2.8-A resolution. The CyPA-CsA complex binds to a composite surface formed by the catalytic and regulatory subunits of CN, where the complex of FK506 and its binding protein FKBP also binds. While the majority of the CN residues involved in the binding are common for both immunophilin-immunosuppressant complexes, a significant number of the residues are distinct. Unlike FKBP-FK506, CyPA-CsA interacts with Arg-122 at the active site of CN, implying direct involvement of CyPA-CsA in the regulation of CN catalysis. The simultaneous interaction of CyPA with both the composite surface and the active site of CN suggests that the composite surface may serve as a substrate recognition site responsible for the narrow substrate specificity of CN. The comparison of CyPA-CsA-CN with FKBP-FK506-CN significantly contributes to understanding the molecular basis of regulation of CN activity by the immunophilin-immunosuppressant.


    Organizational Affiliation

    Department of Biochemistry and Biophysics and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599-7260, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SERINE/THREONINE PROTEIN PHOSPHATASE 2B CATALYTIC SUBUNIT, ALPHA ISOFORMA, E372Homo sapiensMutation(s): 0 
Gene Names: CNA ALPHAPPP3CACALNACNA
EC: 3.1.3.16
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Find proteins for Q08209 (Homo sapiens)
Explore Q08209 
Go to UniProtKB:  Q08209
PHAROS:  Q08209
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
CALCINEURIN B SUBUNIT ISOFORM 1B, F169Homo sapiensMutation(s): 0 
Gene Names: CNBPPP3R1CNA2
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Find proteins for P63098 (Homo sapiens)
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Go to UniProtKB:  P63098
PHAROS:  P63098
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE AC, G165Homo sapiensMutation(s): 0 
Gene Names: PPIACYPA
EC: 5.2.1.8
UniProt & NIH Common Fund Data Resources
Find proteins for P62937 (Homo sapiens)
Explore P62937 
Go to UniProtKB:  P62937
PHAROS:  P62937
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
CYCLOSPORIN AD, H11Tolypocladium inflatumMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  5 Unique
IDChainsTypeFormula2D DiagramParent
ABA
Query on ABA
D, HL-PEPTIDE LINKINGC4 H9 N O2ALA
BMT
Query on BMT
D, HL-PEPTIDE LINKINGC10 H19 N O3THR
MLE
Query on MLE
D, HL-PEPTIDE LINKINGC7 H15 N O2LEU
MVA
Query on MVA
D, HL-PEPTIDE LINKINGC6 H13 N O2VAL
SAR
Query on SAR
D, HPEPTIDE LINKINGC3 H7 N O2GLY
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 4
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000142
Query on PRD_000142
D, HCyclosporin ACyclic peptide /  Immunosuppressant

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.322 
  • R-Value Work: 0.260 
  • R-Value Observed: 0.260 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 108.657α = 90
b = 108.657β = 90
c = 316.59γ = 90
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-09-25
    Type: Initial release
  • Version 1.1: 2011-06-14
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2011-07-27
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary
  • Version 1.4: 2012-12-12
    Changes: Other
  • Version 1.5: 2017-11-01
    Changes: Derived calculations