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Minor groove-binding architectural proteins: structure, function, and DNA recognition

C A Bewley1, A M Gronenborn, G M Clore

  • 1Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-520, USA.

Annual Review of Biophysics and Biomolecular Structure
|July 1, 1998
PubMed
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High-resolution structures reveal how architectural proteins like TATA-box-binding protein and integration host factor (IHF) bind DNA minor grooves. This binding alters DNA shape, facilitating complex protein-DNA assembly and sequence recognition.

Area of Science:

  • Structural Biology
  • Molecular Biology
  • Genetics

Background:

  • High-resolution structures of five DNA-binding architectural proteins complexed with DNA have been determined.
  • These proteins include TATA-box-binding protein, integration host factor (IHF), high mobility group I(Y) [HMG I(Y)], SRY, and LEF-1.

Purpose of the Study:

  • To review the structural features of these protein-DNA complexes.
  • To discuss the roles of these proteins in higher-order complex assembly.
  • To explore sequence-specific recognition and DNA conformational changes.

Main Methods:

  • Review of existing high-resolution structural data.
  • Analysis of protein-DNA interaction interfaces.
  • Comparative analysis of DNA conformational changes induced by different proteins.

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Main Results:

  • All studied proteins interact with DNA exclusively via minor groove contacts.
  • These interactions induce significant alterations in DNA conformation.
  • Structural insights explain sequence-specific recognition and DNA bending.

Conclusions:

  • Minor groove binding is a common mechanism for architectural DNA-binding proteins.
  • DNA conformational changes are crucial for facilitating higher-order protein-DNA complex formation.
  • Understanding these structures provides insights into gene regulation and DNA processing.