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Structural variation in PWWP domains.

Leanne M Slater1, Mark D Allen, Mark Bycroft

  • 1MRC Centre for Protein Engineering, Hills Road, Cambridge CB2 2QH, UK.

Journal of Molecular Biology
|July 5, 2003
PubMed
Summary
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Researchers determined the structure of a PWWP domain from the fission yeast S. pombe. This chromatin-associated protein module shows structural differences compared to its mammalian counterpart.

Area of Science:

  • Biochemistry
  • Structural Biology
  • Molecular Biology

Background:

  • The PWWP domain is a conserved protein module found in eukaryotic proteins, often associated with chromatin.
  • This domain contains a highly conserved PWWP motif and is approximately 80 amino acids long.

Purpose of the Study:

  • To determine the three-dimensional structure of the PWWP domain from the Schizosaccharomyces pombe (S. pombe) protein SPBC215.07c.
  • To compare the determined structure with homologous PWWP domains, specifically from mammalian DNA methyltransferase Dnmt3b.

Main Methods:

  • Nuclear Magnetic Resonance (NMR) spectroscopy was employed to elucidate the protein structure.
  • Comparative structural analysis was performed against existing structural data.

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Main Results:

  • The S. pombe PWWP domain structure consists of a five-stranded beta barrel followed by two alpha helices.
  • Significant structural variations were observed in the C-terminal helical region and the PWWP motif when compared to the Dnmt3b PWWP domain.

Conclusions:

  • The study provides novel structural insights into the S. pombe PWWP domain.
  • Observed structural differences suggest potential variations in function or interaction mechanisms between PWWP domains from different species.