1cle

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[[Image:1cle.gif|left|200px]]<br /><applet load="1cle" size="350" color="white" frame="true" align="right" spinBox="true"
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[[Image:1cle.gif|left|200px]]
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caption="1cle, resolution 2.00&Aring;" />
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'''STRUCTURE OF UNCOMPLEXED AND LINOLEATE-BOUND CANDIDA CYLINDRACEA CHOLESTEROL ESTERASE'''<br />
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{{Structure
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|PDB= 1cle |SIZE=350|CAPTION= <scene name='initialview01'>1cle</scene>, resolution 2.00&Aring;
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|SITE=
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|LIGAND= <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene> and <scene name='pdbligand=CLL:CHOLESTERYL LINOLEATE'>CLL</scene>
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|ACTIVITY=
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|GENE=
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}}
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'''STRUCTURE OF UNCOMPLEXED AND LINOLEATE-BOUND CANDIDA CYLINDRACEA CHOLESTEROL ESTERASE'''
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==Overview==
==Overview==
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==About this Structure==
==About this Structure==
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1CLE is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Candida_cylindracea Candida cylindracea] with <scene name='pdbligand=NAG:'>NAG</scene>, <scene name='pdbligand=PO4:'>PO4</scene> and <scene name='pdbligand=CLL:'>CLL</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CLE OCA].
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1CLE is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Candida_cylindracea Candida cylindracea]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CLE OCA].
==Reference==
==Reference==
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Structure of uncomplexed and linoleate-bound Candida cylindracea cholesterol esterase., Ghosh D, Wawrzak Z, Pletnev VZ, Li N, Kaiser R, Pangborn W, Jornvall H, Erman M, Duax WL, Structure. 1995 Mar 15;3(3):279-88. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=7788294 7788294]
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Structure of uncomplexed and linoleate-bound Candida cylindracea cholesterol esterase., Ghosh D, Wawrzak Z, Pletnev VZ, Li N, Kaiser R, Pangborn W, Jornvall H, Erman M, Duax WL, Structure. 1995 Mar 15;3(3):279-88. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/7788294 7788294]
[[Category: Candida cylindracea]]
[[Category: Candida cylindracea]]
[[Category: Single protein]]
[[Category: Single protein]]
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[[Category: substrate/product-bound]]
[[Category: substrate/product-bound]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:07:19 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 10:25:53 2008''

Revision as of 08:25, 20 March 2008

Image:1cle.gif


PDB ID 1cle

Drag the structure with the mouse to rotate
, resolution 2.00Å
Ligands: , and
Coordinates: save as pdb, mmCIF, xml



STRUCTURE OF UNCOMPLEXED AND LINOLEATE-BOUND CANDIDA CYLINDRACEA CHOLESTEROL ESTERASE


Overview

BACKGROUND: Candida cylindracea cholesterol esterase (CE) reversibly hydrolyzes cholesteryl linoleate and oleate. CE belongs to the same alpha/beta hydrolase superfamily as triacylglycerol acyl hydrolases and cholinesterases. Other members of the family that have been studied by X-ray crystallography include Torpedo californica acetylcholinesterase, Geotrichum candidum lipase and Candida rugosa lipase. CE is homologous to C. rugosa lipase 1, a triacylglycerol acyl hydrolase, with which it shares 89% sequence identity. The present study explores the details of dimer formation of CE and the basis for its substrate specificity. RESULTS: The structures of uncomplexed and linoleate-bound CE determined at 1.9 A and 2.0 A resolution, respectively, reveal a dimeric association of monomers in which two active-site gorges face each other, shielding hydrophobic surfaces from the aqueous environment. The fatty-acid chain is buried in a deep hydrophobic pocket near the active site. The positioning of the cholesteryl moiety of the substrate is equivocal, but could be modeled in the hydrophobic core of the dimer interface. CONCLUSIONS: The monomer structure is the same in both the complexed and uncomplexed crystal forms. The dimers differ in the relative positions of the two monomers at the dimer interface. Of the 55 residues that are different in CE from those in C. rugosa lipase 1, 23 are located in the active site and at the dimer interface. The altered substrate specificity is a direct consequence of these substitutions.

About this Structure

1CLE is a Single protein structure of sequence from Candida cylindracea. Full crystallographic information is available from OCA.

Reference

Structure of uncomplexed and linoleate-bound Candida cylindracea cholesterol esterase., Ghosh D, Wawrzak Z, Pletnev VZ, Li N, Kaiser R, Pangborn W, Jornvall H, Erman M, Duax WL, Structure. 1995 Mar 15;3(3):279-88. PMID:7788294

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