1izk

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{{STRUCTURE_1izk| PDB=1izk | SCENE= }}
{{STRUCTURE_1izk| PDB=1izk | SCENE= }}
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'''Thermoactinomyces vulgaris R-47 alpha-amylase 1 mutant enzyme w398v'''
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===Thermoactinomyces vulgaris R-47 alpha-amylase 1 mutant enzyme w398v===
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==Overview==
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Thermoactinomyces vulgaris R-47 produces two alpha-amylases, TVAI and TVAII, differing in substrate specificity from each other. TVAI favors high-molecular-weight substrates like starch, and scarcely hydrolyzes cyclomaltooligosaccharides (cyclodextrins) with a small cavity. TVAII favors low-molecular-weight substrates like oligosaccharides, and can efficiently hydrolyze cyclodextrins with various sized cavities. To understand the relationship between the structure and substrate specificity of these enzymes, we precisely examined the roles of key residues for substrate recognition by X-ray structural and kinetic parameter analyses of mutant enzymes and successfully obtained mutants in which the substrate specificity of each enzyme is partially converted into that of another.
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{{ABSTRACT_PUBMED_12860426}}
==About this Structure==
==About this Structure==
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[[Category: Tonozuka, T.]]
[[Category: Tonozuka, T.]]
[[Category: Alpha-beta barrele]]
[[Category: Alpha-beta barrele]]
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Revision as of 11:16, 1 July 2008

Image:1izk.png

Template:STRUCTURE 1izk

Thermoactinomyces vulgaris R-47 alpha-amylase 1 mutant enzyme w398v

Template:ABSTRACT PUBMED 12860426

About this Structure

1IZK is a Single protein structure of sequence from Thermoactinomyces vulgaris. Full crystallographic information is available from OCA.

Reference

Mutual conversion of substrate specificities of Thermoactinomyces vulgaris R-47 alpha-amylases TVAI and TVAII by site-directed mutagenesis., Ohtaki A, Iguchi A, Mizuno M, Tonozuka T, Sakano Y, Kamitori S, Carbohydr Res. 2003 Jul 22;338(15):1553-8. PMID:12860426

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