2meh

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{{STRUCTURE_2meh| PDB=2meh | SCENE= }}
{{STRUCTURE_2meh| PDB=2meh | SCENE= }}
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'''CONTRIBUTION OF HYDROPHOBIC EFFECT TO THE CONFORMATIONAL STABILITY OF HUMAN LYSOZYME'''
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===CONTRIBUTION OF HYDROPHOBIC EFFECT TO THE CONFORMATIONAL STABILITY OF HUMAN LYSOZYME===
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==Overview==
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To elucidate correlative relationships between structural change and thermodynamic stability in proteins, a series of mutant human lysozymes modified at two buried positions (Ile56 and Ile59) were examined. Their thermodynamic parameters of denaturation and crystal structures were studied by calorimetry and X-ray crystallography. The mutants at positions 56 and 59 exhibited different responses to a series of amino acid substitutions. The changes in stability due to substitutions showed a linear correlation with changes in hydrophobicity of substituted residues, having different slopes at each mutation site. However, the stability of each mutant was found to be represented by a unique equation involving physical properties calculated from mutant structures. By fitting present and previous stability data for mutant human lysozymes substituted at various positions to the equation, the magnitudes of the hydrophobicity of a carbon atom and the hydrophobicity of nitrogen and neutral oxygen atoms were found to be 0.178 and -0.013 kJ/mol.A(2), respectively. It was also found that the contribution of a hydrogen bond with a length of 3.0 A to protein stability was 5.1 kJ/mol and the entropy loss of newly introduction of a water molecules was 7.8 kJ/mol.
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(as it appears on PubMed at http://www.pubmed.gov), where 10556244 is the PubMed ID number.
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{{ABSTRACT_PUBMED_10556244}}
==About this Structure==
==About this Structure==
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[[Category: Hydrolase]]
[[Category: Hydrolase]]
[[Category: O-glycosyl]]
[[Category: O-glycosyl]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 09:32:38 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 16:27:50 2008''

Revision as of 13:27, 27 July 2008

Image:2meh.png

Template:STRUCTURE 2meh

CONTRIBUTION OF HYDROPHOBIC EFFECT TO THE CONFORMATIONAL STABILITY OF HUMAN LYSOZYME

Template:ABSTRACT PUBMED 10556244

About this Structure

2MEH is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Contribution of amino acid substitutions at two different interior positions to the conformational stability of human lysozyme., Funahashi J, Takano K, Yamagata Y, Yutani K, Protein Eng. 1999 Oct;12(10):841-50. PMID:10556244

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