Molecular characterization of Chlorella chromosomes: screening of bent DNAs

Nucleic Acids Symp Ser. 1995;(34):73-4.

Abstract

As a model for plant-type chromosomes, we have been characterizing molecular organization of Chlorella vulgaris (C-169) chromosome I. To locate structurally important chromosome regions, bent DNA fragments of this chromosome were systematically obtained and analyzed. By two-dimensional polyacrylamide gel electrophoresis, 150 clones containing bent DNA fragments were screened from C. vulgaris genomic libraries. These clones were classified into 3 groups by Southern hybridization. A group that hybridized with all Chlorella chromosomes contained fragments carrying a retroposon-like element. A clone (p2DS-66A) derived from chromosome VI strongly hybridized with chromosome I as well as the others. The corresponding chromosome I sequences (pI-21 and pI-31) were analyzed in detail.

MeSH terms

  • Base Sequence
  • Chlorella / chemistry*
  • Chlorella / genetics*
  • Chromosomes / chemistry*
  • Chromosomes / genetics*
  • Cloning, Molecular
  • DNA / chemistry*
  • DNA / genetics*
  • DNA / isolation & purification
  • Electrophoresis, Gel, Two-Dimensional
  • Molecular Sequence Data
  • Nucleic Acid Conformation
  • Retroelements

Substances

  • Retroelements
  • DNA