Abstract
Mating Tetrahymena thermophila were bombarded with ribosomal DNA-coated particles at various times in development. Both macronuclear and micronuclear transformants were recovered. Optimal developmental stages for transformation occurred during meiosis for the micronucleus and during anlagen formation for the macronucleus. Evidence is given for transient retention of the introduced plasmid. Genetic and molecular tests confirmed that sexually heritable transformation was associated with integration at the homologous site in the recipient micronuclear chromosome.
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Selected References
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- Allen S. L. Genomic exclusion: a rapid means for inducing homozygous diploid lines in Tetrahymena pyriformis, syngen 1. Science. 1967 Feb 3;155(3762):575–577. doi: 10.1126/science.155.3762.575. [DOI] [PubMed] [Google Scholar]
- Brunk C. F., Navas P. Transformation of Tetrahymena thermophila by electroporation and parameters effecting cell survival. Exp Cell Res. 1988 Feb;174(2):525–532. doi: 10.1016/0014-4827(88)90322-9. [DOI] [PubMed] [Google Scholar]
- Bruns P. J., Katzen A. L., Martin L., Blackburn E. H. A drug-resistant mutation in the ribosomal DNA of Tetrahymena. Proc Natl Acad Sci U S A. 1985 May;82(9):2844–2846. doi: 10.1073/pnas.82.9.2844. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Gaertig J., Gorovsky M. A. Efficient mass transformation of Tetrahymena thermophila by electroporation of conjugants. Proc Natl Acad Sci U S A. 1992 Oct 1;89(19):9196–9200. doi: 10.1073/pnas.89.19.9196. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Gaertig J., Gu L., Hai B., Gorovsky M. A. High frequency vector-mediated transformation and gene replacement in Tetrahymena. Nucleic Acids Res. 1994 Dec 11;22(24):5391–5398. doi: 10.1093/nar/22.24.5391. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Godiska R., Yao M. C. A programmed site-specific DNA rearrangement in Tetrahymena thermophila requires flanking polypurine tracts. Cell. 1990 Jun 29;61(7):1237–1246. doi: 10.1016/0092-8674(90)90688-b. [DOI] [PubMed] [Google Scholar]
- Gorovsky M. A. Genome organization and reorganization in Tetrahymena. Annu Rev Genet. 1980;14:203–239. doi: 10.1146/annurev.ge.14.120180.001223. [DOI] [PubMed] [Google Scholar]
- Gorovsky M. A., Yao M. C., Keevert J. B., Pleger G. L. Isolation of micro- and macronuclei of Tetrahymena pyriformis. Methods Cell Biol. 1975;9(0):311–327. doi: 10.1016/s0091-679x(08)60080-1. [DOI] [PubMed] [Google Scholar]
- Karrer K. M., Yao M. C. Transformation of Tetrahymena thermophila with hypermethylated rRNA genes. Mol Cell Biol. 1988 Apr;8(4):1664–1669. doi: 10.1128/mcb.8.4.1664. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Larson D. D., Blackburn E. H., Yaeger P. C., Orias E. Control of rDNA replication in Tetrahymena involves a cis-acting upstream repeat of a promoter element. Cell. 1986 Oct 24;47(2):229–240. doi: 10.1016/0092-8674(86)90445-9. [DOI] [PubMed] [Google Scholar]
- Martindale D. W., Bruns P. J. Cloning of abundant mRNA species present during conjugation of Tetrahymena thermophila: identification of mRNA species present exclusively during meiosis. Mol Cell Biol. 1983 Oct;3(10):1857–1865. doi: 10.1128/mcb.3.10.1857. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Merriam E. V., Bruns P. J. Phenotypic assortment in Tetrahymena thermophila: assortment kinetics of antibiotic-resistance markers, tsA, death, and the highly amplified rDNA locus. Genetics. 1988 Oct;120(2):389–395. doi: 10.1093/genetics/120.2.389. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sweeney R., Yao M. C. Identifying functional regions of rRNA by insertion mutagenesis and complete gene replacement in Tetrahymena thermophila. EMBO J. 1989 Mar;8(3):933–938. doi: 10.1002/j.1460-2075.1989.tb03454.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Tondravi M. M., Yao M. C. Transformation of Tetrahymena thermophila by microinjection of ribosomal RNA genes. Proc Natl Acad Sci U S A. 1986 Jun;83(12):4369–4373. doi: 10.1073/pnas.83.12.4369. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Yao M. C., Gall J. G. A single integrated gene for ribosomal RNA in a eucaryote, Tetrahymena pyriformis. Cell. 1977 Sep;12(1):121–132. doi: 10.1016/0092-8674(77)90190-8. [DOI] [PubMed] [Google Scholar]
- Yao M. C., Yao C. H., Monks B. The controlling sequence for site-specific chromosome breakage in Tetrahymena. Cell. 1990 Nov 16;63(4):763–772. doi: 10.1016/0092-8674(90)90142-2. [DOI] [PubMed] [Google Scholar]
- Yasuda L. F., Yao M. C. Short inverted repeats at a free end signal large palindromic DNA formation in Tetrahymena. Cell. 1991 Nov 1;67(3):505–516. doi: 10.1016/0092-8674(91)90525-4. [DOI] [PubMed] [Google Scholar]
- Yu G. L., Blackburn E. H. Amplification of tandemly repeated origin control sequences confers a replication advantage on rDNA replicons in Tetrahymena thermophila. Mol Cell Biol. 1990 May;10(5):2070–2080. doi: 10.1128/mcb.10.5.2070. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Yu G. L., Blackburn E. H. Transformation of Tetrahymena thermophila with a mutated circular ribosomal DNA plasmid vector. Proc Natl Acad Sci U S A. 1989 Nov;86(21):8487–8491. doi: 10.1073/pnas.86.21.8487. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Yu G. L., Hasson M., Blackburn E. H. Circular ribosomal DNA plasmids transform Tetrahymena thermophila by homologous recombination with endogenous macronuclear ribosomal DNA. Proc Natl Acad Sci U S A. 1988 Jul;85(14):5151–5155. doi: 10.1073/pnas.85.14.5151. [DOI] [PMC free article] [PubMed] [Google Scholar]