Abstract
The sequence specificity of the Tetrahymena DNA-adenine methylase was determined by nearest-neighbor analyses of in vivo and in vitro methylated DNA. In vivo all four common bases were found to the 5' side of N6-methyladenine, but only thymidine was 3'. Homologous DNA already methylated in vivo and heterologous Micrococcus luteus DNA were methylated in vitro by a partially purified DNA-adenine methylase activity isolated from Tetrahymena macronuclei. The in vitro-methylated sequence differed from the in vivo sequence in that both thymidine and cytosine were 3' nearest neighbors of N6-methyladenine.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- 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., Hattman S., Pleger G. L. ( 6 N)methyl adenine in the nuclear DNA of a eucaryote, Tetrahymena pyriformis. J Cell Biol. 1973 Mar;56(3):697–701. doi: 10.1083/jcb.56.3.697. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Gorovsky M. A. Macro- and micronuclei of Tetrahymena pyriformis: a model system for studying the structure and function of eukaryotic nuclei. J Protozool. 1973 Feb;20(1):19–25. doi: 10.1111/j.1550-7408.1973.tb05995.x. [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]
- Hattman S., Brooks J. E., Masurekar M. Sequence specificity of the P1 modification methylase (M.Eco P1) and the DNA methylase (M.Eco dam) controlled by the Escherichia coli dam gene. J Mol Biol. 1978 Dec 15;126(3):367–380. doi: 10.1016/0022-2836(78)90046-3. [DOI] [PubMed] [Google Scholar]
- Hattman S., Keister T., Gottehrer A. Sequence specificity of DNA methylases from Bacillus amyloliquefaciens and Bacillus brevis. J Mol Biol. 1978 Oct 5;124(4):701–711. doi: 10.1016/0022-2836(78)90178-x. [DOI] [PubMed] [Google Scholar]
- Hattman S., Kenny C., Berger L., Pratt K. Comparative study of DNA methylation in three unicellular eucaryotes. J Bacteriol. 1978 Sep;135(3):1156–1157. doi: 10.1128/jb.135.3.1156-1157.1978. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hattman S., van Ormondt H., de Waard A. Sequence specificity of the wild-type dam+) and mutant (damh) forms of bacteriophage T2 DNA adenine methylase. J Mol Biol. 1978 Mar 5;119(3):361–376. doi: 10.1016/0022-2836(78)90219-x. [DOI] [PubMed] [Google Scholar]
- Holliday R., Pugh J. E. DNA modification mechanisms and gene activity during development. Science. 1975 Jan 24;187(4173):226–232. [PubMed] [Google Scholar]
- Pratt K., Hattman S. Deoxyribonucleic acid methylation and chromatin organization in Tetrahymena thermophila. Mol Cell Biol. 1981 Jul;1(7):600–608. doi: 10.1128/mcb.1.7.600. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Rae P. M., Steele R. E. Modified bases in the DNAs of unicellular eukaryotes: an examination of distributions and possible roles, with emphasis on hydroxymethyluracil in dinoflagellates. Biosystems. 1978 Apr;10(1-2):37–53. doi: 10.1016/0303-2647(78)90027-8. [DOI] [PubMed] [Google Scholar]
- Razin A., Riggs A. D. DNA methylation and gene function. Science. 1980 Nov 7;210(4470):604–610. doi: 10.1126/science.6254144. [DOI] [PubMed] [Google Scholar]
- Riggs A. D. X inactivation, differentiation, and DNA methylation. Cytogenet Cell Genet. 1975;14(1):9–25. doi: 10.1159/000130315. [DOI] [PubMed] [Google Scholar]
- Sager R., Kitchin R. Selective silencing of eukaryotic DNA. Science. 1975 Aug 8;189(4201):426–433. [PubMed] [Google Scholar]