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Related Experiment Videos

Zinc finger domains: hypotheses and current knowledge.

J M Berg1

  • 1Department of Chemistry, Johns Hopkins University, Baltimore, MD 21218.

Annual Review of Biophysics and Biophysical Chemistry
|January 1, 1990
PubMed
Summary

Zinc finger proteins, crucial for gene expression and development, are the largest class of DNA-binding proteins in eukaryotes. Their structures are key to understanding gene regulation and potential roles in cellular processes.

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • TFIIIA exhibits a periodic structure with cysteine-histidine pairs, suggesting metal ion coordination.
  • A significant number of cDNA clones encode proteins with zinc finger consensus sequences.
  • Zinc finger proteins constitute a major class of eukaryotic DNA-binding proteins.

Purpose of the Study:

  • To explore the structure and function of zinc finger proteins.
  • To develop models for zinc finger protein-DNA binding interactions.
  • To investigate the role of zinc ions in protein structure and gene regulation.

Main Methods:

  • Analysis of cDNA clones encoding zinc finger proteins.
  • Elucidation of single zinc finger domain structures.
  • Development of models for protein-DNA complexes.
  • Utilizing NMR and crystallographic studies for structural data.

Main Results:

  • Zinc finger proteins are abundant and play a fundamental role in gene expression and development.
  • Progress has been made in understanding the structure of individual zinc finger domains.
  • Models for zinc finger protein-DNA binding complexes can be developed based on structural knowledge.

Conclusions:

  • Testing and extending models of zinc finger protein-DNA interactions is a critical future challenge.
  • The role of zinc ions in these proteins may extend beyond structural support to potentially regulating gene expression.
  • Further biophysical data is needed to fully understand the function of zinc binding in these proteins.

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