Fine structure of the human galactokinase GALK1 gene

Derk J. Bergsma, Yunjun Ai, William R. Skach, Kristin Nesburn, Elizabeth Anoia, Stephanie Van Horn, Dwight Stambolian

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Abstract

Defects in the human GALK1 gene result in galactokinase deficiency and cataract formation. We have isolated this gene and established its structural organization. The gene contains 8 exons and spans ~ 7.3 kb of genomic DNA. The GALK1 promoter was localized and Found to have many features in common with other housekeeping genes, including high GC content, several copies of the binding site for the Sp1 transcription factor, and the absence of TATA-box and CCAAT-box motifs typically present in eukaryotic Pol II promoters. Analysis by 5'-RACE PCR indicates that the GALK1 mRNA is heterogeneous at the 5' terminus, with transcription sites occurring at many locations between 21 and 61 bp upstream of the ATG start site of the coding region. In vitro translation experiments of the GALK1 cDNA indicate that the protein is cytosolic and not associated with the endoplasmic reticulum membrane.

Original languageEnglish (US)
Pages (from-to)980-985
Number of pages6
JournalGenome Research
Volume6
Issue number10
StatePublished - Nov 30 1996

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ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

Cite this

Bergsma, D. J., Ai, Y., Skach, W. R., Nesburn, K., Anoia, E., Van Horn, S., & Stambolian, D. (1996). Fine structure of the human galactokinase GALK1 gene. Genome Research, 6(10), 980-985.