1qy2: Difference between revisions

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[[Image:1qy2.gif|left|200px]]
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[[Image:1qy2.png|left|200px]]


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{{STRUCTURE_1qy2|  PDB=1qy2  |  SCENE=  }}  
{{STRUCTURE_1qy2|  PDB=1qy2  |  SCENE=  }}  


'''Thermodynamics of Binding of 2-methoxy-3-isopropylpyrazine and 2-methoxy-3-isobutylpyrazine to the Major Urinary Protein'''
===Thermodynamics of Binding of 2-methoxy-3-isopropylpyrazine and 2-methoxy-3-isobutylpyrazine to the Major Urinary Protein===




==Overview==
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In the present study we examine the thermodynamics of binding of two related pyrazine-derived ligands to the major urinary protein, MUP-I, using a combination of isothermal titration calorimetry (ITC), X-ray crystallography, and NMR backbone (15)N and methyl side-chain (2)H relaxation measurements. Global thermodynamics data derived from ITC indicate that binding is driven by favorable enthalpic contributions, rather than the classical entropy-driven hydrophobic effect. Unfavorable entropic contributions from the protein backbone and side-chain residues in the vicinity of the binding pocket are partially offset by favorable entropic contributions at adjacent positions, suggesting a "conformational relay" mechanism whereby increased rigidity of residues on ligand binding are accompanied by increased conformational freedom of side chains in adjacent positions. The principal driving force governing ligand affinity and specificity can be attributed to solvent-driven enthalpic effects from desolvation of the protein binding pocket.
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==About this Structure==
==About this Structure==
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[[Category: Lipocalin]]
[[Category: Lipocalin]]
[[Category: Mup1]]
[[Category: Mup1]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 06:50:25 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 04:39:24 2008''

Revision as of 01:39, 29 July 2008

File:1qy2.png

Template:STRUCTURE 1qy2

Thermodynamics of Binding of 2-methoxy-3-isopropylpyrazine and 2-methoxy-3-isobutylpyrazine to the Major Urinary Protein

Template:ABSTRACT PUBMED 14871097

About this Structure

1QY2 is a Single protein structure of sequence from Mus musculus. Full crystallographic information is available from OCA.

Reference

Thermodynamics of binding of 2-methoxy-3-isopropylpyrazine and 2-methoxy-3-isobutylpyrazine to the major urinary protein., Bingham RJ, Findlay JB, Hsieh SY, Kalverda AP, Kjellberg A, Perazzolo C, Phillips SE, Seshadri K, Trinh CH, Turnbull WB, Bodenhausen G, Homans SW, J Am Chem Soc. 2004 Feb 18;126(6):1675-81. PMID:14871097

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