1mf8

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Crystal Structure of human calcineurin complexed with cyclosporin A and human cyclophilin

Structural highlights

1mf8 is a 4 chain structure with sequence from Homo sapiens and Tolypocladium inflatum. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 3.1Å
Ligands:ABA, BMT, CA, DAL, MLE, MVA, PO4, SAR
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

PP2BA_HUMAN Calcium-dependent, calmodulin-stimulated protein phosphatase. This subunit may have a role in the calmodulin activation of calcineurin. Dephosphorylates DNM1L, HSPB1 and SSH1.[1] [2]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Calcineurin (Cn), a Ca(2+)/calmodulin-dependent Ser/Thr protein phosphatase, is an important participant in signaling pathways that activate T cells. It is the target of the immunosuppressive drugs cyclosporin A (CsA) and FK506. These drugs bind proteins known as cyclophilin (Cyp) and FK506-binding protein, respectively, and the drug-protein complexes in turn inhibit Cn. We report the crystal structure of a Cyp/CsA/Cn ternary complex, determined to a resolution of 3.1 A. Residues 3-9 of CsA, particularly N-methyl leucines 4 and 6, and Trp-121 of Cyp form a composite surface for interaction with Cn. The hydrophobic interface buries two hydrogen bonds. The structure accounts clearly for the effects of mutations in Cn on CsA-resistance and for the way modifications of CsA alter immunosuppressive activity.

Crystal structure of human calcineurin complexed with cyclosporin A and human cyclophilin.,Jin L, Harrison SC Proc Natl Acad Sci U S A. 2002 Oct 15;99(21):13522-6. Epub 2002 Sep 30. PMID:12357034[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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See Also

References

  1. ↑ Wang Y, Shibasaki F, Mizuno K. Calcium signal-induced cofilin dephosphorylation is mediated by Slingshot via calcineurin. J Biol Chem. 2005 Apr 1;280(13):12683-9. Epub 2005 Jan 24. PMID:15671020 doi:M411494200
  2. ↑ Cereghetti GM, Stangherlin A, Martins de Brito O, Chang CR, Blackstone C, Bernardi P, Scorrano L. Dephosphorylation by calcineurin regulates translocation of Drp1 to mitochondria. Proc Natl Acad Sci U S A. 2008 Oct 14;105(41):15803-8. doi:, 10.1073/pnas.0808249105. Epub 2008 Oct 6. PMID:18838687 doi:10.1073/pnas.0808249105
  3. ↑ Jin L, Harrison SC. Crystal structure of human calcineurin complexed with cyclosporin A and human cyclophilin. Proc Natl Acad Sci U S A. 2002 Oct 15;99(21):13522-6. Epub 2002 Sep 30. PMID:12357034 doi:http://dx.doi.org/10.1073/pnas.212504399

Contents


PDB ID 1mf8

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