An electrophoretic and biochemical comparison of soluble trehalase from Drosophila melanogaster and D. simulans

T. A. Bargiello, J. Grossfield

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Soluble trehalases isolated from adult Drosophila melanogaster and D. simulans can be distinguished following polyacrylamide gel electrophoresis in triethanolamine gels. Ferguson plots indicated that the two forms are related as charge isomers. This suggests that these trehalases are most likely allozymes, an interpretation which is consistent with the taxonomic relationship of the two species. A comparison of the pH optima and Km of the soluble enzyme obtained from 0 to 3-day-old and 12 to 15-day-old D. melanogaster and 0 to 4-day-old and 12 to 15-day-old D. simulans revealed no differences. The pH optima of the enzymes lay between 5.5 and 6.0 and the average Km, estimated from Lineweaver-Burk plots, is 7.26 × 10+4 M. However, there were marked differences in the maximal catalytic activity per gram wet weight of soluble trehalases; the catalytic activity of both age samples of D. simulans enzyme exceeded that of both samples from D. melanogaster. In both species, the younger flies showed higher activity.

Original languageEnglish (US)
Pages (from-to)323-329
Number of pages7
JournalInsect Biochemistry
Volume9
Issue number3
DOIs
StatePublished - 1979
Externally publishedYes

Fingerprint

Trehalase
trehalase
Drosophila simulans
Drosophila melanogaster
4 alpha-glucanotransferase
catalytic activity
Catalyst activity
enzymes
Enzymes
Electrophoresis
Diptera
Isomers
allozymes
Isoenzymes
isomers
polyacrylamide gel electrophoresis
Polyacrylamide Gel Electrophoresis
Gels
gels
Weights and Measures

Keywords

  • allozymes
  • catalytic activity
  • Drosophila
  • electrophoresis
  • K
  • pH optima
  • trehalase

Cite this

An electrophoretic and biochemical comparison of soluble trehalase from Drosophila melanogaster and D. simulans. / Bargiello, T. A.; Grossfield, J.

In: Insect Biochemistry, Vol. 9, No. 3, 1979, p. 323-329.

Research output: Contribution to journalArticle

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