1fq4
From Proteopedia
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| - | [[Image:1fq4.jpg|left|200px]] | + | [[Image:1fq4.jpg|left|200px]] |
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| - | '''CRYSTAL STRUCTURE OF A COMPLEX BETWEEN HYDROXYETHYLENE INHIBITOR CP-108,420 AND YEAST ASPARTIC PROTEINASE A''' | + | {{Structure |
| + | |PDB= 1fq4 |SIZE=350|CAPTION= <scene name='initialview01'>1fq4</scene>, resolution 2.7Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=NDG:2-(ACETYLAMINO)-2-DEOXY-A-D-GLUCOPYRANOSE'>NDG</scene>, <scene name='pdbligand=TRM:1H-BENOXIMIDAZOLE-2-CARBOXYLIC+ACID'>TRM</scene>, <scene name='pdbligand=SMC:S-METHYLCYSTEINE'>SMC</scene>, <scene name='pdbligand=PCE:2-(3-AMINO-4-CYCLOHEXYL-2-HYDROXY-BUTYL)-PENT-4-YNOIC+ACID'>PCE</scene> and <scene name='pdbligand=EMR:N-AMINOETHYLMORPHOLINE'>EMR</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/Saccharopepsin Saccharopepsin], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.23.25 3.4.23.25] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''CRYSTAL STRUCTURE OF A COMPLEX BETWEEN HYDROXYETHYLENE INHIBITOR CP-108,420 AND YEAST ASPARTIC PROTEINASE A''' | ||
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==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1FQ4 is a [ | + | 1FQ4 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FQ4 OCA]. |
==Reference== | ==Reference== | ||
| - | X-ray structures of five renin inhibitors bound to saccharopepsin: exploration of active-site specificity., Cronin NB, Badasso MO, J Tickle I, Dreyer T, Hoover DJ, Rosati RL, Humblet CC, Lunney EA, Cooper JB, J Mol Biol. 2000 Nov 10;303(5):745-60. PMID:[http:// | + | X-ray structures of five renin inhibitors bound to saccharopepsin: exploration of active-site specificity., Cronin NB, Badasso MO, J Tickle I, Dreyer T, Hoover DJ, Rosati RL, Humblet CC, Lunney EA, Cooper JB, J Mol Biol. 2000 Nov 10;303(5):745-60. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11061973 11061973] |
[[Category: Saccharomyces cerevisiae]] | [[Category: Saccharomyces cerevisiae]] | ||
[[Category: Saccharopepsin]] | [[Category: Saccharopepsin]] | ||
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[[Category: extended beta-strand (inhibitor)]] | [[Category: extended beta-strand (inhibitor)]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 11:12:36 2008'' |
Revision as of 09:12, 20 March 2008
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| , resolution 2.7Å | |||||||
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| Ligands: | , , , and | ||||||
| Activity: | Saccharopepsin, with EC number 3.4.23.25 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF A COMPLEX BETWEEN HYDROXYETHYLENE INHIBITOR CP-108,420 AND YEAST ASPARTIC PROTEINASE A
Overview
Saccharopepsin is a vacuolar aspartic proteinase involved in activation of a number of hydrolases. The enzyme has great structural homology to mammalian aspartic proteinases including human renin and we have used it as a model system to study the binding of renin inhibitors by X-ray crystallography. Five medium-to-high resolution structures of saccharopepsin complexed with transition-state analogue renin inhibitors were determined. The structure of a cyclic peptide inhibitor (PD-129,541) complexed with the proteinase was solved to 2.5 A resolution. This inhibitor has low affinity for human renin yet binds very tightly to the yeast proteinase (K(i)=4 nM). The high affinity of this inhibitor can be attributed to its bulky cyclic moiety spanning P(2)-P(3)' and other residues that appear to optimally fit the binding sub-sites of the enzyme. Superposition of the saccharopepsin structure on that of renin showed that a movement of the loop 286-301 relative to renin facilitates tighter binding of this inhibitor to saccharopepsin. Our 2.8 A resolution structure of the complex with CP-108,420 shows that its benzimidazole P(3 )replacement retains one of the standard hydrogen bonds that normally involve the inhibitor's main-chain. This suggests a non-peptide lead in overcoming the problem of susceptible peptide bonds in the design of aspartic proteinase inhibitors. CP-72,647 which possesses a basic histidine residue at P(2), has a high affinity for renin (K(i)=5 nM) but proves to be a poor inhibitor for saccharopepsin (K(i)=3.7 microM). This may stem from the fact that the histidine residue would not bind favourably with the predominantly hydrophobic S(2) sub-site of saccharopepsin.
About this Structure
1FQ4 is a Single protein structure of sequence from Saccharomyces cerevisiae. Full crystallographic information is available from OCA.
Reference
X-ray structures of five renin inhibitors bound to saccharopepsin: exploration of active-site specificity., Cronin NB, Badasso MO, J Tickle I, Dreyer T, Hoover DJ, Rosati RL, Humblet CC, Lunney EA, Cooper JB, J Mol Biol. 2000 Nov 10;303(5):745-60. PMID:11061973
Page seeded by OCA on Thu Mar 20 11:12:36 2008
Categories: Saccharomyces cerevisiae | Saccharopepsin | Single protein | Badasso, M O. | Cooper, J B. | Cronin, N B. | Dreyer, T. | Hoover, D J. | Humblet, C C. | Lunney, E A. | Rosati, R L. | Tickle, I J. | EMR | NDG | PCE | SMC | TRM | Aspartic proteinase/inhibitor complex | Extended beta-strand (inhibitor)
