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Literature DB >> 6322132

Direct repeats surrounding the ribosomal RNA genes of Physarum polycephalum.

Abstract

Sequence homology was found between the external transcribed spacer and the terminal non-transcribed spacer of Physarum polycephalum rDNA. The homologous sequences were located 2kb upstream from the 19s rRNA gene and 0.3kb downstream from 26S rRNA gene, respectively, and were arranged in a direct repeat manner. Sequence analyses showed that the direct repeats consisted of two parts: one was sequences of about 130bp which showed over 90% sequence homology with each other. The other consisted mainly of many tandem repeats of a 50 to 52bp unit. The direct repeat-rRNA genes-direct repeat unit was found to be flanked by short direct repetitious sequences. Based on these findings, the significance of the direct repeat is discussed in terms of evolution of rDNA.

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Year: 1984 PMID： 6322132 PMCID： PMC318639 DOI： 10.1093/nar/12.4.2047

Source DB: PubMed Journal: Nucleic Acids Res ISSN： 0305-1048 Impact factor: 16.971

20 in total

2. Conserved arrangements of repeated DNA sequences in nontranscribed spacers of ciliate ribosomal RNA genes: evidence for molecular coevolution.

Authors: P B Challoner; A A Amin; R E Pearlman; E H Blackburn
Journal: Nucleic Acids Res Date: 1985-04-11 Impact factor: 16.971

3. The linear extrachromosomal DNA of Physarum polycephalum replicates and is maintained under non-selective conditions in two different lower eukaryotes.

Authors: P Künzler
Journal: Nucleic Acids Res Date: 1985-03-25 Impact factor: 16.971

3 in total

Direct repeats surrounding the ribosomal RNA genes of Physarum polycephalum.

1. Detection of specific sequences among DNA fragments separated by gel electrophoresis.

2. Structure of ribosomal DNA in Physarum polycephalum.

3. The gene for the 26 S rRNA in Physarum contains two insertions.

4. Unique sequence arrangement of ribosomal genes in the palindromic rDNA molecule of Physarum polycephalum.

5. Nucleotide sequence analysis of the chloramphenicol resistance transposon Tn9.

6. The replication of ribosomal DNA in Physarum polycephalum.

7. Sequencing end-labeled DNA with base-specific chemical cleavages.

8. Evidence for transposition of dispersed repetitive DNA families in yeast.

9. Terminal repeats of the Drosophila transposable element copia: nucleotide sequence and genomic organization.

10. Complete nucleotide sequence of the 26S rRNA gene of Physarum polycephalum: its significance in gene evolution.

1. Processing in the external transcribed spacer of ribosomal RNA from Physarum polycephalum.

2. Conserved arrangements of repeated DNA sequences in nontranscribed spacers of ciliate ribosomal RNA genes: evidence for molecular coevolution.

3. The linear extrachromosomal DNA of Physarum polycephalum replicates and is maintained under non-selective conditions in two different lower eukaryotes.