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Control of DNA excision efficiency in Paramecium
- Source :
- Scopus-Elsevier
- Publication Year :
- 2001
- Publisher :
- Oxford University Press (OUP), 2001.
-
Abstract
- Programmed excision of internal eliminated sequences (IESs) occurs at thousands of sites in ciliate genomes. How this is controlled is largely unknown. Here, we report the characterization of the non-efficiently excised 156psiG-11 IES from Paramecium primaurelia strain 156 and that of the efficiently excised 168psiG-11 IES, an allelic variant from strain 168. Then, we report a genetic and molecular analysis of IES excision efficiency in F(1) progeny derived from interstrain crosses and in F(2) homozygous progeny derived from F(1) autogamy. IES 168psiG-11 excision efficiency was approximately 100% in all cases. IES 156psiG-11 excision efficiency was 19 +/- 13% in F(1) progeny and 0.6 +/- 1.1% in F(2) progeny. No trans-excision event between IESs 156psiG-11 and 168psiG-11 was detected within the F(1) progeny. These data demonstrate that the excision efficiency of this IES is variable and controlled by a cis-acting element. This should encompass positions 8 and/or 9 of the right IES end, which display allele differences. Finally, the 30-fold stimulation of IES 156psiG-11 excision efficiency within F(1) progeny relative to F(2) progeny demonstrates that Paramecium IES excision efficiency is sensitive either to a conjugation-specific trans-acting factor provided by the zygotic genome, or to homologous chromosome cross-talk.
- Subjects :
- Paramecium
Pseudogene
Molecular Sequence Data
Antigens, Protozoan
Biology
Genome
Article
Sequence Homology, Nucleic Acid
Genetics
Homologous chromosome
Animals
Allele
Alleles
Cell Nucleus
Zygote
Base Sequence
Strain (chemistry)
Sequence Analysis, DNA
DNA, Protozoan
biology.organism_classification
DNA excision
Molecular biology
Gene Expression Regulation
Antigens, Surface
Pseudogenes
Subjects
Details
- ISSN :
- 13624962
- Volume :
- 29
- Database :
- OpenAIRE
- Journal :
- Nucleic Acids Research
- Accession number :
- edsair.doi.dedup.....5b1d30e0c785955d1ab5632aa5be98e6