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1hi4

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1hi4, resolution 1.80Å ()
Ligands:
Activity: Pancreatic ribonuclease, with EC number 3.1.27.5
Related: 1hi2, 1hi3, 1hi5
Resources: FirstGlance, OCA, RCSB, PDBsum
Coordinates: save as pdb, mmCIF, xml



EOSINOPHIL-DERIVED NEUROTOXIN (EDN) -ADENOSINE-3'-5'-DIPHOSPHATE COMPLEX

Publication Abstract from PubMed

Eosinophil-derived neurotoxin (EDN), a basic ribonuclease found in the large specific granules of eosinophils, belongs to the pancreatic RNase A family. Although its physiological function is still unclear, it has been shown that EDN is a neurotoxin capable of inducing the Gordon phenomenon in rabbits. EDN is also a potent helminthotoxin and can mediate antiviral activity of eosinophils against isolated virions of the respiratory syncytial virus. EDN is a catalytically efficient RNase sharing similar substrate specificity with pancreatic RNase A with its ribonucleolytic activity being absolutely essential for its neurotoxic, helminthotoxic, and antiviral activities. The crystal structure of recombinant human EDN in the unliganded form has been determined previously (Mosimann, S. C., Newton, D. L., Youle, R. J., and James, M. N. G. (1996) J. Mol. Biol. 260, 540-552). We have now determined high resolution (1.8 A) crystal structures for EDN in complex with adenosine-3',5'-diphosphate (3',5'-ADP), adenosine-2',5'-di-phosphate (2',5'-ADP), adenosine-5'-diphosphate (5'-ADP) as well as for a native structure in the presence of sulfate refined at 1.6 A. The inhibition constant of these mononucleotides for EDN has been determined. The structures present the first detailed picture of differences between EDN and RNase A in substrate recognition at the ribonucleolytic active site. They also provide a starting point for the design of tight-binding inhibitors, which may be used to restrain the RNase activity of EDN.

Mapping the ribonucleolytic active site of eosinophil-derived neurotoxin (EDN). High resolution crystal structures of EDN complexes with adenylic nucleotide inhibitors., Leonidas DD, Boix E, Prill R, Suzuki M, Turton R, Minson K, Swaminathan GJ, Youle RJ, Acharya KR, J Biol Chem. 2001 May 4;276(18):15009-17. Epub 2001 Jan 11. PMID:11154698

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

About this Structure

1hi4 is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

  • Leonidas DD, Boix E, Prill R, Suzuki M, Turton R, Minson K, Swaminathan GJ, Youle RJ, Acharya KR. Mapping the ribonucleolytic active site of eosinophil-derived neurotoxin (EDN). High resolution crystal structures of EDN complexes with adenylic nucleotide inhibitors. J Biol Chem. 2001 May 4;276(18):15009-17. Epub 2001 Jan 11. PMID:11154698 doi:10.1074/jbc.M010585200
  • Mosimann SC, Newton DL, Youle RJ, James MN. X-ray crystallographic structure of recombinant eosinophil-derived neurotoxin at 1.83 A resolution. J Mol Biol. 1996 Jul 26;260(4):540-52. PMID:8759319 doi:10.1006/jmbi.1996.0420

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