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Related Experiment Videos

The mammalian FEN-1 locus: structure and conserved sequence features.

Z E Karanjawala1, X Shi, C L Hsieh

  • 1Norris Comprehensive Cancer Center, Department of Pathology, University of Southern California School of Medicine, Los Angeles 90089, USA.

Microbial & Comparative Genomics
|March 17, 2001
PubMed
Summary
This summary is machine-generated.

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Flap endonuclease 1 (FEN-1) is crucial for DNA replication and repair. Researchers compared the murine and human FEN-1 gene loci, finding conserved sequences that may regulate transcription.

Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Flap endonuclease 1 (FEN-1) is a vital enzyme in eukaryotes, essential for DNA replication by cleaving 5' DNA flaps between Okazaki fragments.
  • FEN-1 also plays critical roles in base excision repair and nonhomologous DNA end joining across eukaryotic organisms, from yeast to humans.

Purpose of the Study:

  • To elucidate the genomic structure of the murine Flap endonuclease 1 (FEN-1) locus.
  • To compare the murine FEN-1 locus with its human counterpart.
  • To identify conserved sequence elements and investigate their potential regulatory functions.

Main Methods:

  • Comparative genomic analysis of murine and human FEN-1 loci.
  • Sequence analysis of the 5' and 3' untranslated regions (UTRs) and upstream regulatory regions.

Related Experiment Videos

  • Identification of nucleotide sequence homology between species.

    • Main Results:

    • The murine and human FEN-1 genes share a single exon coding region.
    • Both loci exhibit transcriptional initiation within a CpG island.
    • Significant nucleotide sequence homology (30-230 bp) was observed in the 5'UTR, 3'UTR, and immediately upstream of the 5'UTR.

    Conclusions:

    • Conserved sequence blocks in the FEN-1 locus suggest potential roles in transcriptional regulation.
    • These conserved regions might indicate the presence of an overlapping gene with opposing transcriptional orientation.
    • Further studies are warranted to determine the precise function of these conserved elements in FEN-1 gene regulation.