1elf: Difference between revisions
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[[Image:1elf.gif|left|200px]] | [[Image:1elf.gif|left|200px]] | ||
'''NATURE OF THE INACTIVATION OF ELASTASE BY N-PEPTIDYL-O-AROYL HYDROXYLAMINE AS A FUNCTION OF PH''' | {{Structure | ||
|PDB= 1elf |SIZE=350|CAPTION= <scene name='initialview01'>1elf</scene>, resolution 1.7Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene> and <scene name='pdbligand=BAF:(TERT-BUTYLOXYCARBONYL)-ALANYL-AMINO ETHYL-FORMAMIDE'>BAF</scene> | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/Pancreatic_elastase Pancreatic elastase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.21.36 3.4.21.36] | |||
|GENE= | |||
}} | |||
'''NATURE OF THE INACTIVATION OF ELASTASE BY N-PEPTIDYL-O-AROYL HYDROXYLAMINE AS A FUNCTION OF PH''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1ELF is a [ | 1ELF is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Sus_scrofa Sus scrofa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ELF OCA]. | ||
==Reference== | ==Reference== | ||
Nature of the inactivation of elastase by N-peptidyl-O-aroyl hydroxylamine as a function of pH., Ding X, Rasmussen BF, Demuth HU, Ringe D, Steinmetz AC, Biochemistry. 1995 Jun 13;34(23):7749-56. PMID:[http:// | Nature of the inactivation of elastase by N-peptidyl-O-aroyl hydroxylamine as a function of pH., Ding X, Rasmussen BF, Demuth HU, Ringe D, Steinmetz AC, Biochemistry. 1995 Jun 13;34(23):7749-56. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/7779821 7779821] | ||
[[Category: Pancreatic elastase]] | [[Category: Pancreatic elastase]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: complex (hydrolase/inhibitor)]] | [[Category: complex (hydrolase/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 10:57:16 2008'' | ||
Revision as of 11:57, 20 March 2008
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| , resolution 1.7Å | |||||||
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| Ligands: | , and | ||||||
| Activity: | Pancreatic elastase, with EC number 3.4.21.36 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
NATURE OF THE INACTIVATION OF ELASTASE BY N-PEPTIDYL-O-AROYL HYDROXYLAMINE AS A FUNCTION OF PH
OverviewOverview
The mechanism of inactivation of porcine pancreatic elastase (PPE) by N-peptidyl-O-aroylhydroxylamine was studied by X-ray crystallography. The inactivator forms a stable complex with the enzyme by means of a covalent attachment to the active site Ser 203(195) O gamma. The nature of the complex is, however, different depending on the pH at which the inactivation reaction occurs. At pH 5, the complex formed is a hydroxylamine derivative of Ser 203(195) in which the O gamma of serine is the oxygen of the hydroxylamine derivative. At pH 7.5, the complex formed is a carbamate derivative at Ser 203(195) O gamma. In both types of complexes, the inactivator binds in the S' subsites of the enzyme instead of forming the usual antiparallel beta-sheet with the S subsites. The implication for the mechanism of inactivation at different pHs is discussed.
About this StructureAbout this Structure
1ELF is a Single protein structure of sequence from Sus scrofa. Full crystallographic information is available from OCA.
ReferenceReference
Nature of the inactivation of elastase by N-peptidyl-O-aroyl hydroxylamine as a function of pH., Ding X, Rasmussen BF, Demuth HU, Ringe D, Steinmetz AC, Biochemistry. 1995 Jun 13;34(23):7749-56. PMID:7779821
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