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Related Concept Videos

Exon Recombination02:32

Exon Recombination

The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes. 
Exon shuffling follows “splice frame rules.” Each exon has three reading...

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Enhanced Northern Blot Detection of Small RNA Species in Drosophila Melanogaster
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Drosophila Myc is required for normal DREF gene expression.

Dang Thi Phuong Thao1, Hirokazu Seto, Masamitsu Yamaguchi

  • 1Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.

Experimental Cell Research
|October 30, 2007
PubMed
Summary
This summary is machine-generated.

Drosophila Myc (dMyc) is essential for the expression of the DNA replication-related element-binding factor (dDREF) gene. This regulation is crucial for cell proliferation and involves dMyc binding to the dDREF promoter.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Developmental Biology

Background:

  • The Drosophila DNA replication-related element-binding factor (dDREF) regulates proliferation genes.
  • A potential E-box in the dDREF promoter suggests regulation by Drosophila Myc (dMyc).

Purpose of the Study:

  • To investigate whether dMyc regulates dDREF gene expression.
  • To elucidate the role of the E-box in dMyc-mediated dDREF regulation.

Main Methods:

  • Luciferase assays in Drosophila S2 cells.
  • RNA interference (RNAi) to knock down dMyc.
  • Analysis of dMyc mutant larvae and follicle cell clones.
  • Immunostaining for dDREF.
  • Overexpression studies of dMyc-dMax and dMyc.

Main Results:

  • dMyc knockdown significantly reduced dDREF promoter activity (35-82%).
  • dMyc loss of function impaired dDREF mRNA transcription and nuclear dDREF levels.
  • dMyc-dMax co-expression and dMyc overexpression upregulated dDREF promoter activity and gene expression.

Conclusions:

  • dMyc is a key regulator of dDREF gene expression in Drosophila.
  • The E-box in the dDREF promoter is involved in dMyc-mediated transcriptional control.
  • dMyc plays a vital role in regulating genes essential for cell proliferation.