rdf:type |
|
lifeskim:mentions |
|
pubmed:issue |
1
|
pubmed:dateCreated |
2000-7-6
|
pubmed:abstractText |
Amylosucrase from Neisseria polysaccharea catalyzes the synthesis of an amylose-like polymer from sucrose. Sequence alignment revealed that it belongs to the glycoside hydrolase family 13. Site-directed mutagenesis enabled the identification of functionally important amino acid residues located at the active center. Asp-294 is proposed to act as the catalytic nucleophile and Glu-336 as general acid base catalyst in amylosucrase. The conserved Asp-401, His-195 and His-400 residues are critical for the enzymatic activity. These results provide strong support for the predicted close structural and functional relationship between the sucrose-glucosyltransferases and enzymes of the alpha-amylase family.
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pubmed:language |
eng
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pubmed:journal |
|
pubmed:citationSubset |
IM
|
pubmed:chemical |
|
pubmed:status |
MEDLINE
|
pubmed:month |
May
|
pubmed:issn |
0014-5793
|
pubmed:author |
|
pubmed:issnType |
Print
|
pubmed:day |
26
|
pubmed:volume |
474
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
33-7
|
pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading |
pubmed-meshheading:10828446-Amino Acid Sequence,
pubmed-meshheading:10828446-Amino Acids,
pubmed-meshheading:10828446-Aspartic Acid,
pubmed-meshheading:10828446-Base Sequence,
pubmed-meshheading:10828446-Binding Sites,
pubmed-meshheading:10828446-Catalysis,
pubmed-meshheading:10828446-Glucosyltransferases,
pubmed-meshheading:10828446-Glutamic Acid,
pubmed-meshheading:10828446-Histidine,
pubmed-meshheading:10828446-Molecular Sequence Data,
pubmed-meshheading:10828446-Mutagenesis, Site-Directed,
pubmed-meshheading:10828446-Neisseria,
pubmed-meshheading:10828446-Sequence Alignment,
pubmed-meshheading:10828446-Structure-Activity Relationship
|
pubmed:year |
2000
|
pubmed:articleTitle |
Identification of key amino acid residues in Neisseria polysaccharea amylosucrase.
|
pubmed:affiliation |
Centre de Bioingénierie Gilbert Durand, UMR CNRS 5504, UR INRA 792, INSA, 135 Avenue de Rangueil, 31 077 Toulouse Cedex 4, France.
|
pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
|