The 15 N‐terminal amino acids of hexokinase II are not required for in vivo function: Analysis of a truncated form of hexokinase II in Saccharomyces cerevisiae

Hong Ma, Leslie M. Bloom, Susan E. Dakin, Christopher T. Walsh, David Botstein

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The function of the N‐terminal amino acids of Saccharomyces cerevisiae hexokinase II was studied in vivo using strains producing a form of hexokinase II lacking its first 15 amino acids (short form).This short form of hexokinase II was produced from a fusion between the promoter region of the PGK1 gene and the HXK2 coding sequence except the first 15 codons. As expected, the in vitro analysis of the short from protein by gel filtration chromatography indicates that the short protein does not form dimers under conditions where the wild‐type protein dimerizes. Kinetic studies show that the enzymatic activities are very similarto wild‐type behavior. The physiological experiments performed on the strains containing the fusion allele demonstrate that the short form ofthe enzyme is similar to the wild‐type both in terms of phosphorylation of hexoses and glucose repression. We conclude that the N‐terminalamino acids of hexokinase II are not required in vivo either for phosporylation of hexoses or for glucose repression.

Original languageEnglish (US)
Pages (from-to)218-223
Number of pages6
JournalProteins: Structure, Function, and Bioinformatics
Volume5
Issue number3
DOIs
StatePublished - Jan 1 1989

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Hexokinase
Yeast
Saccharomyces cerevisiae
Amino Acids
Hexoses
Fusion reactions
Glucose
Phosphorylation
Proteins
Chromatography
Genetic Promoter Regions
Codon
Dimers
Gel Chromatography
Genes
Gels
Alleles
Kinetics
Acids
Enzymes

All Science Journal Classification (ASJC) codes

  • Structural Biology
  • Biochemistry
  • Molecular Biology

Cite this

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abstract = "The function of the N‐terminal amino acids of Saccharomyces cerevisiae hexokinase II was studied in vivo using strains producing a form of hexokinase II lacking its first 15 amino acids (short form).This short form of hexokinase II was produced from a fusion between the promoter region of the PGK1 gene and the HXK2 coding sequence except the first 15 codons. As expected, the in vitro analysis of the short from protein by gel filtration chromatography indicates that the short protein does not form dimers under conditions where the wild‐type protein dimerizes. Kinetic studies show that the enzymatic activities are very similarto wild‐type behavior. The physiological experiments performed on the strains containing the fusion allele demonstrate that the short form ofthe enzyme is similar to the wild‐type both in terms of phosphorylation of hexoses and glucose repression. We conclude that the N‐terminalamino acids of hexokinase II are not required in vivo either for phosporylation of hexoses or for glucose repression.",
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The 15 N‐terminal amino acids of hexokinase II are not required for in vivo function : Analysis of a truncated form of hexokinase II in Saccharomyces cerevisiae. / Ma, Hong; Bloom, Leslie M.; Dakin, Susan E.; Walsh, Christopher T.; Botstein, David.

In: Proteins: Structure, Function, and Bioinformatics, Vol. 5, No. 3, 01.01.1989, p. 218-223.

Research output: Contribution to journalArticle

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