Linked Life Data

16955733

Source:http://linkedlifedata.com/resource/pubmed/id/16955733

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2006-9-6
pubmed:abstractText
The chitinase A (ChiA)-coding gene of Pseudomonas sp. BK1, which was isolated from a marine red alga Porphyra dentata, was cloned and expressed in Escherichia coli. The structural gene consists of 1602 bp encoding a protein of 534 amino acids, with a predicted molecular weight of 55,370 Da. The deduced amino acid sequence of ChiA showed low identity (less than 32%) with other bacterial chitinases. The ChiA was composed of multiple domains, unlike the arrangement of domains in other bacterial chitinases. Recombinant ChiA overproduced as inclusion bodies was solubilized in the presence of 8 M urea, purified in a urea-denatured form and re-folded by removing urea. The purified enzyme showed maximum activity at pH 5.0 and 40 degrees C. It exhibited high activity towards glycol chitosan and glycol chitin, and lower activity towards colloidal chitin. The enzyme hydrolyzed the oligosaccharides from (GlcNAc)4 to (GlcNAc)6, but not GlcNAc to (GlcNAc)3. The results suggest that the ChiA is a novel enzyme, with different domain structure and action mode from bacterial family 18 chitinases.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0301-1208
pubmed:author
pubmed:issnType
Print
pubmed:volume
42
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
339-44
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
Overexpression and characterization of a novel chitinase gene from a marine bacterium Pseudomonas sp. BK1.
pubmed:affiliation
Faculty of Biotechnology, College of Natural Resources and Life Science, Dong-A University, Busan, Korea.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't