Isolation and sequencing of cDNA clones coding for the catalytic unit of glucose-6-phosphatase from two haplochromine cichlid fishes

Sandra Nagl, Werner E. Mayer, Jan Klein

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Complementary DNA clones coding for the catalytic unit of the enzyme glucose-6-phosphatase (G6Pase) were obtained from Haplochromis nubilus and Haplochromis xenognathus, two cichlid fish species from Lake Victoria. The translated sequence of these two cDNAs identifies a polypeptide consisting of 352 amino acid residues and showing a 54.4% similarity to the human form of G6Pase. The amino acid sequences of the two fish species are identical. The comparison of the fish amino acid sequence with the corresponding sequences of rat, mouse, and human G6Pase revealed that the amino acid residues, which are involved in G6Pase catalysis in humans, are also conserved in fish G6Pase. Northern blot analysis showed that G6Pase is expressed at the same level in 6- and 10-day-old fish. A three base pair insertion/deletion polymorphism was found in the 3′-untranslated region of the fish G6Pase gene. The polymorphism will be a useful marker in a phylogenetic study of Lake Victoria cichlids.

Original languageEnglish (US)
Pages (from-to)25-29
Number of pages5
JournalMitochondrial DNA
Volume10
Issue number1
DOIs
StatePublished - Dec 1 1999

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Cichlids
Glucose-6-Phosphatase
Complementary DNA
Clone Cells
Fishes
Victoria
Lakes
Amino Acid Sequence
Amino Acids
3' Untranslated Regions
Catalysis
Base Pairing
Northern Blotting
Peptides
Enzymes
Genes

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Genetics

Cite this

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title = "Isolation and sequencing of cDNA clones coding for the catalytic unit of glucose-6-phosphatase from two haplochromine cichlid fishes",
abstract = "Complementary DNA clones coding for the catalytic unit of the enzyme glucose-6-phosphatase (G6Pase) were obtained from Haplochromis nubilus and Haplochromis xenognathus, two cichlid fish species from Lake Victoria. The translated sequence of these two cDNAs identifies a polypeptide consisting of 352 amino acid residues and showing a 54.4{\%} similarity to the human form of G6Pase. The amino acid sequences of the two fish species are identical. The comparison of the fish amino acid sequence with the corresponding sequences of rat, mouse, and human G6Pase revealed that the amino acid residues, which are involved in G6Pase catalysis in humans, are also conserved in fish G6Pase. Northern blot analysis showed that G6Pase is expressed at the same level in 6- and 10-day-old fish. A three base pair insertion/deletion polymorphism was found in the 3′-untranslated region of the fish G6Pase gene. The polymorphism will be a useful marker in a phylogenetic study of Lake Victoria cichlids.",
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Isolation and sequencing of cDNA clones coding for the catalytic unit of glucose-6-phosphatase from two haplochromine cichlid fishes. / Nagl, Sandra; Mayer, Werner E.; Klein, Jan.

In: Mitochondrial DNA, Vol. 10, No. 1, 01.12.1999, p. 25-29.

Research output: Contribution to journalArticle

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