1CYB

NMR STUDIES OF (U-13C)CYCLOSPORIN A BOUND TO CYCLOPHILIN: BOUND CONFORMATION AND PORTIONS OF CYCLOSPORIN INVOLVED IN BINDING


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

NMR Studies of [U-13C]Cyclosporin a Bound to Cyclophilin: Bound Conformation and Portions of Cyclosporin Involved in Binding.

Fesik, S.W.Gampe, R.T.Eaton, H.L.Gemmecker, G.Olejniczak, E.T.Neri, P.Holzman, T.F.Egan, D.A.Edalji, R.

(1991) Biochemistry 30: 6574

  • DOI: 10.1021/bi00240a030
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Cyclosporin A (CsA), a potent immunosuppressant, is known to bind with high specificity to cyclophilin (CyP), a 17.7 kDa protein with peptidyl-prolyl isomerase activity. In order to investigate the three-dimensional structure of the CsA/CyP complex, ...

    Cyclosporin A (CsA), a potent immunosuppressant, is known to bind with high specificity to cyclophilin (CyP), a 17.7 kDa protein with peptidyl-prolyl isomerase activity. In order to investigate the three-dimensional structure of the CsA/CyP complex, we have applied a variety of multidimensional NMR methods in the study of uniformly 13C-labeled CsA bound to cyclophilin. The 1H and 13C NMR signals of cyclosporin A in the bound state have been assigned, and from a quantitative interpretation of the 3D NOE data, the bound conformation of CsA has been determined. Three-dimensional structures of CsA calculated from the NOE data by using a distance geometry/simulated appealing protocol were found to be very different from previously determined crystalline and solution conformations of uncomplexed CsA. In addition, from CsA/CyP NOEs, the portions of CsA that interact with cyclophilin were identified. For the most part, those CsA residues with NOEs to cyclophilin were the same residues important for cyclophilin binding and immunosuppressive activity as determined from structure/activity relationships. The structural information derived in this study together with the known structure/activity relationships for CsA analogues may prove useful in the design of improved immunosuppressants. Moreover, the approach that is described for obtaining the structural information is widely applicable to the study of small molecule/large molecule interactions.


    Related Citations: 
    • Identification of Solvent-Exposed Regions of Enzyme-Bound Ligands by Nuclear Magnetic Resonance
      Fesik, S.W., Gemmecker, G., Olejniczak, E.T., Petros, A.M.
      (1991) J Am Chem Soc 113: 7080
    • 1H, 13C and 15N Backbone Assignments of Cyclophilin When Bound to Cyclosporin a (Csa) and Preliminary Structural Characterization of the Csa Binding Site
      Neri, P., Meadows, R., Gemmecker, G., Olejniczak, E., Nettesheim, D., Logan, T., Simmer, R., Helfrich, R., Holzman, T., Severin, J., Fesik, S.
      (1991) FEBS Lett 294: 81

    Organizational Affiliation

    Pharmaceutical Discovery Division, Abbott Laboratories, Abbott Park, Illinois 60064.



Macromolecules
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CYCLOSPORIN AA11Tolypocladium inflatumMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000142
Query on PRD_000142
ACyclosporin AC /  Immunosuppressant

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Modified Residues  5 Unique
IDChainsTypeFormula2D DiagramParent
ABA
Query on ABA
AL-PEPTIDE LINKINGC4 H9 N O2ALA
BMT
Query on BMT
AL-PEPTIDE LINKINGC10 H19 N O3THR
MLE
Query on MLE
AL-PEPTIDE LINKINGC7 H15 N O2LEU
MVA
Query on MVA
AL-PEPTIDE LINKINGC6 H13 N O2VAL
SAR
Query on SAR
APEPTIDE LINKINGC3 H7 N O2GLY
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 
  • OLDERADO: 1CYB Olderado

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 1992-02-24 
  • Released Date: 1994-01-31 
  • Deposition Author(s): Fesik, S.W.

Revision History 

  • Version 1.0: 1994-01-31
    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