First time at Proteopedia? Click on the green links: they change the 3D image. Click and drag the molecules. Proteopedia is a 3D, interactive encyclopedia of proteins, RNA, DNA and other molecules. With a free user account, you can edit pages in Proteopedia. Visit the Main Page to learn more.

1fkd

From Proteopedia

Jump to: navigation, search


1fkd, resolution 1.72Å ()
Ligands:
Resources: FirstGlance, OCA, PDBsum, RCSB
Coordinates: save as pdb, mmCIF, xml



Contents

FK-506 BINDING PROTEIN: THREE-DIMENSIONAL STRUCTURE OF THE COMPLEX WITH THE ANTAGONIST L-685,818

Publication Abstract from PubMed

L-685,818 differs only slightly in structure from the immunosuppressive drug FK-506, and both compounds bind with comparable affinity to the 12-kDa FK-506-binding protein (FKBP12), the major intracellular receptor for the drug. Despite these similarities, L-685,818 is a potent antagonist of both the immunosuppressive and toxic effects of the drug. Here, we present a structural analysis of this problem. Although FK-506 and L-685,818 differ greatly in pharmacology, we have found that the three-dimensional structures of their complexes with FKBP12 are essentially identical. Approximately half of each ligand is in contact with the receptor protein, and half is exposed to solvent; the exposed region includes the two sites where the compounds differ. These results indicate that the profound differences in the pharmacology of these two compounds are not caused by any difference in their interaction with FKBP12. Rather, these effects arise because relatively minor changes in the exposed part of a bound ligand have a strong effect on how FKBP12-ligand complexes interact with calcineurin, their putative intracellular target. In addition, FK-506 complexes with FKBP12 proteins from several species all inhibit mammalian calcineurin. Analysis of the three-dimensional structure of the complex with respect to residues conserved among these proteins suggests a small number of surface residues near the bound ligands that may play a critical role in interactions between the protein-drug complex and calcineurin.

FK-506-binding protein: three-dimensional structure of the complex with the antagonist L-685,818., Becker JW, Rotonda J, McKeever BM, Chan HK, Marcy AI, Wiederrecht G, Hermes JD, Springer JP, J Biol Chem. 1993 May 25;268(15):11335-9. PMID:7684380

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

About this Structure

1fkd is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA.

See Also

Reference

  • Becker JW, Rotonda J, McKeever BM, Chan HK, Marcy AI, Wiederrecht G, Hermes JD, Springer JP. FK-506-binding protein: three-dimensional structure of the complex with the antagonist L-685,818. J Biol Chem. 1993 May 25;268(15):11335-9. PMID:7684380

Proteopedia Page Contributors and Editors (what is this?)

OCA

Personal tools