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A cereal centromeric sequence

L Aragón-Alcaide1, T Miller, T Schwarzacher

  • 1Cereals Department, John Innes Centre, Colney lane, Norwich, NR4 7UH, UK.

Chromosoma
|December 1, 1996
PubMed
Summary
This summary is machine-generated.

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Researchers identified a novel DNA sequence family (CCS1) in cereal chromosomes, including maize and rice. This discovery aids in studying the evolution of cereal centromeres and their associated proteins.

Area of Science:

  • Genetics
  • Molecular Biology
  • Plant Science

Background:

  • Centromeres are crucial for chromosome segregation during cell division.
  • Understanding centromere structure and evolution is vital for plant genomics.
  • Previous knowledge on cereal centromeric sequences and their evolutionary relationships was limited.

Purpose of the Study:

  • To identify and characterize novel repetitive DNA sequences at cereal centromeres.
  • To investigate the evolutionary conservation and distribution of these sequences across Triticeae, maize, and rice.
  • To explore the potential role of these sequences in centromere function and evolution.

Main Methods:

  • In situ hybridization was employed to localize the identified sequences within the chromosomes of various cereal species.

Related Experiment Videos

  • Bioinformatic analyses were used to align and compare the sequences with existing cereal genome data.
  • Homology searches were performed to identify related sequences and protein-binding motifs, such as the CENP-B box.

    • Main Results:

    • A novel family of sequences, designated CCS1, was identified and localized to the centromeres of all studied Triticeae chromosomes, including supernumerary and midget chromosomes.
    • CCS1 sequences were also found at the centromeres of all maize chromosomes and in the heterochromatic regions of rice chromosomes.
    • The CCS1 family exhibits homology to the CENP-B box, a known centromeric DNA-binding motif.

    Conclusions:

    • The identification of the CCS1 sequence family provides a valuable tool for studying the evolution of cereal centromeres and their organization.
    • These findings facilitate the characterization of cereal centromeres and the proteins that interact with them.
    • The conserved nature of CCS1 across diverse cereal species suggests its fundamental role in centromere structure or function.