1CSA

THE MUTANT E.COLI F112W CYCLOPHILIN BINDS CYCLOSPORIN A IN NEARLY IDENTICAL CONFORMATION AS HUMAN CYCLOPHILIN


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 18 

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This is version 1.4 of the entry. See complete history


Literature

The Mutant Escherichia Coli F112W Cyclophilin Binds Cyclosporin a in Nearly Identical Conformation as Human Cyclophilin.

Fejzo, J.Etzkorn, F.A.Clubb, R.T.Shi, Y.Walsh, C.T.Wagner, G.

(1994) Biochemistry 33: 5711

  • DOI: 10.1021/bi00185a007
  • Primary Citation of Related Structures:  
    1CSA

  • PubMed Abstract: 
  • The periplasmic Escherichia coli cyclophilin is distantly related to human cyclophilin (34% sequence identity). Peptidyl-prolyl isomerase activity, cyclosporin A binding, and inhibition of the calcium-dependent phosphatase calcineurin are compared for human and E ...

    The periplasmic Escherichia coli cyclophilin is distantly related to human cyclophilin (34% sequence identity). Peptidyl-prolyl isomerase activity, cyclosporin A binding, and inhibition of the calcium-dependent phosphatase calcineurin are compared for human and E. coli wild-type and mutant proteins. Like human cyclophilin, the E. coli protein is a cis-trans peptidyl-prolyl isomerase. However, while the human protein binds cyclosporin A tightly (Kd = 17 nM), the E. coli protein does not (Kd = 3.4 microM). The mutant F112W E. coli cyclophilin has enhanced cyclosporin binding (Kd = 170 nM). As for the human protein, the complex of the E. coli mutant with cyclosporin A inhibits calcineurin. Here we describe the structure at pH 6.2 of cyclosporin A bound to the mutant E. coli cyclophilin as solved with solution NMR methods. Despite the low overall sequence identity, the structure of the bound cyclosporin A is virtually identical in both proteins. To assess differences of the cyclosporin binding site, the solution structure of wild-type E. coli cyclophilin was compared with structures of uncomplexed human cyclophilin A and with cyclosporin bound. Despite the structural similarity of bound cyclosporin A, the architecture of the binding site in the E. coli protein is substantially different at the site most distant to tryptophan 121 (human sequence). This site is constructed by a five-residue insertion in a loop of the E. coli protein, replacing another loop in the human protein.


    Related Citations: 
    • Three-Dimensional Solution Structure of Escherichia Coli Periplasmic Cyclophilin.
      Clubb, R.T., Ferguson, S.B., Walsh, C.T., Wagner, G.
      (1994) Biochemistry 33: 2761

    Organizational Affiliation

    Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115.



Macromolecules
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CYCLOSPORIN A A11Tolypocladium inflatumMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
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
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 1
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000142
Query on PRD_000142
ACyclosporin ACyclic peptide /  Immunosuppressant

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Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 18 
  • OLDERADO: 1CSA Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1994-04-30
    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