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2ans

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{{STRUCTURE_2ans| PDB=2ans | SCENE= }}
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'''ADIPOCYTE LIPID BINDING PROTEIN COMPLEXED WITH 1-ANILINO-8-NAPHTHALENE SULFONATE'''
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===ADIPOCYTE LIPID BINDING PROTEIN COMPLEXED WITH 1-ANILINO-8-NAPHTHALENE SULFONATE===
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==Overview==
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The fluorescent probe anilinonaphthalene-8-sulfonate binds to adipocyte lipid binding protein at a site that competes with normal physiological ligands, such as fatty acids. Binding to the protein is accompanied by a relatively large increase in fluorescent intensity. To correlate the major change in optical properties and to determine the mechanism of competitive inhibition with fatty acids, the crystal structure of the protein with the bound fluorophore has been determined. In addition, the thermodynamic contributions to the binding reaction have been studied by titration calorimetry. Because the binding site is in a relatively internal position, kinetic studies have also been carried out to determine k(on). The results indicate that binding is not accompanied by any major conformational change. However, the negatively charged sulfonate moiety is not positioned the same as the carboxylate of fatty acid ligands as determined in previous studies. Nonetheless, the binding reaction is still driven by enthalpic effects. As judged by the crystallographic structure, a significant amount of the surface of the fluorophore is no longer exposed to water in the bound state.
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{{ABSTRACT_PUBMED_10423455}}
==About this Structure==
==About this Structure==
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[[Category: Fluorescent probe]]
[[Category: Fluorescent probe]]
[[Category: Lipid-binding protein]]
[[Category: Lipid-binding protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 19:16:01 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 15:05:08 2008''

Revision as of 12:05, 29 July 2008

Image:2ans.png

Template:STRUCTURE 2ans

ADIPOCYTE LIPID BINDING PROTEIN COMPLEXED WITH 1-ANILINO-8-NAPHTHALENE SULFONATE

Template:ABSTRACT PUBMED 10423455

About this Structure

2ANS is a Single protein structure of sequence from Mus musculus. Full crystallographic information is available from OCA.

Reference

Studies of the ligand binding reaction of adipocyte lipid binding protein using the fluorescent probe 1, 8-anilinonaphthalene-8-sulfonate., Ory JJ, Banaszak LJ, Biophys J. 1999 Aug;77(2):1107-16. PMID:10423455

Page seeded by OCA on Tue Jul 29 15:05:08 2008

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