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PLP-1 binds nematode double-stranded telomeric DNA.

Seol Hee Im1, Junho Lee

  • 1Molecular Aging Research Center, Yonsei University, Seoul 120-749, Korea.

Molecules and Cells
|November 4, 2005
PubMed
Summary
This summary is machine-generated.

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We identified PLP-1, a novel double-stranded telomere binding protein. PLP-1 binds TTAGGC repeats, indicating multiple proteins may interact with nematode telomeres simultaneously.

Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Telomere integrity relies on the association of telomeric DNA with specific proteins.
  • Previous work identified F45E4.2 as a candidate double-stranded telomere binding protein.

Purpose of the Study:

  • To characterize the double-stranded telomere binding protein PLP-1 (encoded by F45E4.2).
  • To determine the DNA binding specificity of PLP-1.

Main Methods:

  • Affinity chromatography followed by mass spectrometry was used to identify PLP-1.
  • In vitro competition assays were performed to assess DNA binding.
  • The core binding sequence of PLP-1 was determined.

Main Results:

  • PLP-1 was identified as a double-stranded telomere binding protein.

Related Experiment Videos

  • PLP-1 demonstrated specific binding to double-stranded telomeric DNA in vitro.
  • The core binding motif for PLP-1 involves the third and fourth nucleotides of the TTAGGC repeat.

    • Conclusions:

    • PLP-1 is a novel protein that binds double-stranded telomeric DNA.
    • The distinct binding sequence of PLP-1 compared to CEH-37 suggests simultaneous binding of multiple proteins to nematode telomeres in vivo.