Linked Life Data

17368197

Source:http://linkedlifedata.com/resource/pubmed/id/17368197

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2007-3-19
pubmed:abstractText
Here, we report the PCR amplification and cloning of a cDNA for arginine kinase (AK) from the beetle Cissites cephalotes (Olivier). The cDNA is 1210bp and has an open reading frame of 1125bp and 5' and 3'-untranslated regions of 30 and 55bp, respectively. The open reading frame encodes a 374 amino acid protein with most of the residues considered necessary for AK function: five residues predicted to interact with the substrate arginine (S77, Y82, E239, C285 and E328), and five residues predicted to interact with the substrate ADP (R138, R140, R243, R294 and R323). A phylogenetic tree of arthropod AKs indicated clearly that insect AKs can be separated into typical AKs from various insect species (group 1) and putative AK sequences deduced from genomic sequences (group 2). Cissites AK clustered in group 2 and provides the first evidence that a group-2 gene is indeed expressed in insects. Moreover, we expressed Cissites AK protein in Escherichia coli as a fusion with maltose-binding protein, and kinetic constants (K(m), K(d), V(max) and k(cat)) were determined for the forward reaction. Comparison of kinetic constants with those of AKs from other sources (insects, mollusks and echinoderms) indicated that insect AKs from Cissites and Periplaneta have two very unique features, the lowest k(cat) (and k(cat)/K(m)(arg)) among AKs, and a lack of synergistic substrate binding (K(d)/K(m) approximately 1).
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0965-1748
pubmed:author
pubmed:issnType
Print
pubmed:volume
37
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
338-45
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Arginine kinase from the beetle Cissites cephalotes (Olivier). Molecular cloning, phylogenetic analysis and enzymatic properties.
pubmed:affiliation
Laboratory of Biochemistry, Faculty of Science, Kochi University, Kochi 780-8520, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't