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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2005-10-19
pubmed:abstractText
The amino acid sequence of an intracellular poly[D(-)-3-hydroxybutyrate] (PHB) depolymerase (PhaZ1) from Ralstonia eutropha H16 was compared with the sequences of various proteins using the BLAST search. It showed a number of matches including with intracellular PHB depolymerases, conserved hypothetical proteins, and PHB synthases. From an alignment of these proteins, we constructed nine mutants: C87A, S118A, H120Q, C183A, C183S, D355A, D356A, C370A, and H388Q. The C183A, D355A, and H388Q mutants lost their activities, but C183S and the other mutants did not. C183, D355, and H388 in PhaZ1 were positioned similarly to the amino acids of the catalytic triad of PHB synthase. These results indicated that C183, D355, and H388 make up the catalytic triad of PhaZ1.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:issn
1389-1723
pubmed:author
pubmed:issnType
Print
pubmed:volume
96
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
487-92
pubmed:year
2003
pubmed:articleTitle
Catalytic triad of intracellular poly(3-hydroxybutyrate) depolymerase (PhaZ1) in Ralstonia eutropha H16.
pubmed:affiliation
Laboratory of Molecular Microbiology, Department of Biological Sciences, Faculty of Science, Kanagawa University, 2946 Tsuchiya, Hiratsuka, Kanagawa 259-1293, Japan.
pubmed:publicationType
Journal Article