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1esa

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[[Image:1esa.gif|left|200px]]
[[Image:1esa.gif|left|200px]]
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{{Structure
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<!--
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|PDB= 1esa |SIZE=350|CAPTION= <scene name='initialview01'>1esa</scene>, resolution 1.65&Aring;
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The line below this paragraph, containing "STRUCTURE_1esa", creates the "Structure Box" on the page.
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|SITE=
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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|LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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|ACTIVITY= <span class='plainlinks'>[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] </span>
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or leave the SCENE parameter empty for the default display.
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|GENE=
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|DOMAIN=
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{{STRUCTURE_1esa| PDB=1esa | SCENE= }}
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|RELATEDENTRY=
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1esa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1esa OCA], [http://www.ebi.ac.uk/pdbsum/1esa PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1esa RCSB]</span>
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}}
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'''DIRECT STRUCTURE OBSERVATION OF AN ACYL-ENZYME INTERMEDIATE IN THE HYDROLYSIS OF AN ESTER SUBSTRATE BY ELASTASE'''
'''DIRECT STRUCTURE OBSERVATION OF AN ACYL-ENZYME INTERMEDIATE IN THE HYDROLYSIS OF AN ESTER SUBSTRATE BY ELASTASE'''
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[[Category: Rasmussen, B.]]
[[Category: Rasmussen, B.]]
[[Category: Ringe, D.]]
[[Category: Ringe, D.]]
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[[Category: hydrolase(serine proteinase)]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 15:27:44 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 20:08:38 2008''
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Revision as of 12:27, 2 May 2008

Image:1esa.gif

Template:STRUCTURE 1esa

DIRECT STRUCTURE OBSERVATION OF AN ACYL-ENZYME INTERMEDIATE IN THE HYDROLYSIS OF AN ESTER SUBSTRATE BY ELASTASE


Overview

The method of X-ray crystallographic cryoenzymology has been used to determine the crystal structure of a kinetically significant species on the reaction pathway of a crystalline enzyme. The structure of a specific acyl-enzyme intermediate in the elastase-catalyzed hydrolysis of the N-carbobenzoxy-L-alanine p-nitrophenyl ester has been determined and refined against X-ray diffraction data at 2.3-A resolution. The difference Fourier electron density map clearly shows electron density for the trapped acyl-enzyme. The acyl-enzyme was formed at -26 degrees C and was stabilized at -55 degrees C during data collection, taking advantage of the glass transition in protein dynamics that occurs at around -50 degrees C.

About this Structure

1ESA is a Single protein structure of sequence from Sus scrofa. Full crystallographic information is available from OCA.

Reference

Direct structural observation of an acyl-enzyme intermediate in the hydrolysis of an ester substrate by elastase., Ding X, Rasmussen BF, Petsko GA, Ringe D, Biochemistry. 1994 Aug 9;33(31):9285-93. PMID:8049229 Page seeded by OCA on Fri May 2 15:27:44 2008

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