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Structure and function of DNA-binding proteins

H C Nelson1

  • 1University of California, Department of Molecular and Cell Biology, Berkeley 94720-3206, USA.

Current Opinion in Genetics & Development
|April 1, 1995
PubMed
Summary
This summary is machine-generated.

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Over three dozen new DNA-binding protein structures were determined, revealing novel motifs like the p53 tumor suppressor domain and Escherichia coli DNA topoisomerase I fragment. These findings advance our understanding of protein-DNA interactions and structural variations.

Area of Science:

  • Structural biology
  • Molecular biology
  • Biochemistry

Background:

  • DNA-binding proteins are crucial for regulating gene expression and DNA replication.
  • Understanding protein-DNA interactions at a structural level is key to deciphering biological processes.
  • Previous years have established various structural motifs for DNA recognition.

Purpose of the Study:

  • To present newly determined three-dimensional structures of diverse DNA-binding proteins.
  • To highlight novel structural motifs and variations in known DNA-binding protein families.
  • To provide structural insights into the function of key proteins like p53 and DNA topoisomerase I.

Main Methods:

  • X-ray crystallography for structure determination.
  • Co-crystallization techniques to capture protein-DNA complexes.

Related Experiment Videos

  • Structure analysis and comparison with existing databases.

    • Main Results:

    • Determination of over 36 new DNA-binding protein structures.
    • Identification of the DNA-binding domain of the p53 tumor suppressor.
    • Characterization of the amino-terminal fragment of Escherichia coli DNA topoisomerase I.
    • Observation of variations in established motifs like helix-turn-helix, basic helix-loop-helix, and zinc fingers.

    Conclusions:

    • The past year has significantly expanded the structural repertoire of DNA-binding proteins.
    • New structural data provides deeper insights into protein-DNA recognition mechanisms.
    • These findings contribute to a comprehensive understanding of the structural diversity and functional implications of DNA-binding proteins.