Linked Life Data

18514003

Source:http://linkedlifedata.com/resource/pubmed/id/18514003

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2008-7-7
pubmed:abstractText
A novel endogenous beta-1,4-endoglucanase (EG) gene belonging to the glycosyl hydrolase family 9 (GHF 9) that is distributed throughout the digestive tract of the cricket Teleogryllus emma was cloned and characterized. This gene, named TeEG-I, consists of eight exons encoding 453 amino acid residues and exists as a single copy in the T. emma genome. TeEG-I possesses all the features, including signature motifs and catalytic domains, of GHF 9 members, sharing high levels of identity with the termite, Mastotermes darwiniensis (64% protein sequence identity), and the cockroach, Panesthia cribrata (62%), GHF 9 cellulases. Recombinant TeEG-I, which is expressed as a 47-kDa polypeptide in baculovirus-infected insect Sf9 cells, showed an optimal pH and temperature of pH 5.0 and 40 degrees C. The K(m) and V(max) values for digestion of carboxymethyl cellulose were 5.4 mg/ml and 3118.4 U/mg, respectively. Northern and Western blot analyses revealed that TeEG-I is present throughout the digestive tract, which correlated with the TeEG-I distribution and cellulase activity in the digestive tract as assayed by immunofluorescence staining and enzyme activity assay, respectively. These results indicate that TeEG-I is distributed throughout the entire digestive tract of T. emma, suggesting a functional role of endogenous TeEG-I in a sequential cellulose digestion process throughout the T. emma digestion tract.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
1096-4959
pubmed:author
pubmed:issnType
Print
pubmed:volume
150
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
368-76
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Molecular cloning and characterization of a glycosyl hydrolase family 9 cellulase distributed throughout the digestive tract of the cricket Teleogryllus emma.
pubmed:affiliation
College of Natural Resources and Life Science, Dong-A University, Busan 604-714, South Korea.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't