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Related Experiment Videos

MAZ-dependent termination between closely spaced human complement genes

R Ashfield1, A J Patel, S A Bossone

  • 1Sir William Dunn School of Pathology, University of Oxford, UK.

The EMBO Journal
|December 1, 1994
PubMed
Summary
This summary is machine-generated.

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The zinc finger protein MAZ binds to DNA sequences, promoting transcriptional termination. This discovery aids in understanding gene regulation and identifying new termination sites.

Area of Science:

  • Molecular Biology
  • Genetics
  • Gene Regulation

Background:

  • The zinc finger protein MAZ (originally identified as a c-myc P2 promoter binding factor) is implicated in transcriptional termination.
  • A termination sequence between human complement genes C2 and Factor B interacts with multiple proteins, including MAZ.

Purpose of the Study:

  • To investigate the role of MAZ in transcriptional termination at specific gene loci.
  • To identify and characterize MAZ binding sites and their functional significance in gene regulation.

Main Methods:

  • In vitro protein-DNA binding assays.
  • In vivo termination assays using gene constructs.
  • Site-directed mutagenesis of MAZ binding sites.
  • DNA bending assays.

Related Experiment Videos

Main Results:

  • MAZ binding to the C2 termination sequence correlates with its activity in vivo.
  • A consensus MAZ binding site (G5AG5) was determined, enabling identification of new sites in human and mouse genes.
  • Mutation of MAZ sites in C2 and g11 genes significantly reduced termination activity.
  • MAZ-induced DNA bending is proposed as a mechanism for efficient termination.

Conclusions:

  • MAZ plays a crucial role in transcriptional termination at specific gene locations, particularly between closely spaced genes.
  • MAZ binding sites are important for preventing transcriptional interference and ensuring proper gene expression.
  • The identified MAZ consensus sequence is a valuable tool for discovering additional functional sites.