Abstract
The enzyme I-CeuI, encoded by a class I mobile intron inserted in the gene for 23S rRNA in Chlamydomonas eugamatos, cleaves a specific 19-bp sequence in this gene. This sequence is present only in the seven genes for rRNA in Salmonella typhimurium and Escherichia coli. Partial digestion with I-CeuI of DNA from 17 wild-type strains of S. typhimurium indicates that the chromosome of these strains is strongly conserved, for the digestion products closely resemble those of strain LT2. The lengths and order of chromosomal segments are conserved in 15 of the strains; 2 show some rearrangements. XbaI digestion indicated heterogeneity without revealing the genomic structure. Because of conservation of I-CeuI sites in genes for rRNA and conservation of the number and locations of these genes, I-CeuI provides an excellent tool for the rapid examination of the chromosomes of related species of bacteria; differences in the fingerprints indicate the occurrence of chromosomal rearrangements such as insertions or inversions.
Full Text
The Full Text of this article is available as a PDF (535.8 KB).
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Bell-Pedersen D., Quirk S., Clyman J., Belfort M. Intron mobility in phage T4 is dependent upon a distinctive class of endonucleases and independent of DNA sequences encoding the intron core: mechanistic and evolutionary implications. Nucleic Acids Res. 1990 Jul 11;18(13):3763–3770. doi: 10.1093/nar/18.13.3763. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Beltran P., Plock S. A., Smith N. H., Whittam T. S., Old D. C., Selander R. K. Reference collection of strains of the Salmonella typhimurium complex from natural populations. J Gen Microbiol. 1991 Mar;137(3):601–606. doi: 10.1099/00221287-137-3-601. [DOI] [PubMed] [Google Scholar]
- Colleaux L., d'Auriol L., Betermier M., Cottarel G., Jacquier A., Galibert F., Dujon B. Universal code equivalent of a yeast mitochondrial intron reading frame is expressed into E. coli as a specific double strand endonuclease. Cell. 1986 Feb 28;44(4):521–533. doi: 10.1016/0092-8674(86)90262-x. [DOI] [PubMed] [Google Scholar]
- Delahodde A., Goguel V., Becam A. M., Creusot F., Perea J., Banroques J., Jacq C. Site-specific DNA endonuclease and RNA maturase activities of two homologous intron-encoded proteins from yeast mitochondria. Cell. 1989 Feb 10;56(3):431–441. doi: 10.1016/0092-8674(89)90246-8. [DOI] [PubMed] [Google Scholar]
- Dujon B., Belfort M., Butow R. A., Jacq C., Lemieux C., Perlman P. S., Vogt V. M. Mobile introns: definition of terms and recommended nomenclature. Gene. 1989 Oct 15;82(1):115–118. doi: 10.1016/0378-1119(89)90035-8. [DOI] [PubMed] [Google Scholar]
- Dürrenberger F., Rochaix J. D. Chloroplast ribosomal intron of Chlamydomonas reinhardtii: in vitro self-splicing, DNA endonuclease activity and in vivo mobility. EMBO J. 1991 Nov;10(11):3495–3501. doi: 10.1002/j.1460-2075.1991.tb04913.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Gauthier A., Turmel M., Lemieux C. A group I intron in the chloroplast large subunit rRNA gene of Chlamydomonas eugametos encodes a double-strand endonuclease that cleaves the homing site of this intron. Curr Genet. 1991 Jan;19(1):43–47. doi: 10.1007/BF00362086. [DOI] [PubMed] [Google Scholar]
- Honeycutt R. J., McClelland M., Sobral B. W. Physical map of the genome of Rhizobium meliloti 1021. J Bacteriol. 1993 Nov;175(21):6945–6952. doi: 10.1128/jb.175.21.6945-6952.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Krawiec S., Riley M. Organization of the bacterial chromosome. Microbiol Rev. 1990 Dec;54(4):502–539. doi: 10.1128/mr.54.4.502-539.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Liu S. L., Hessel A., Sanderson K. E. Genomic mapping with I-Ceu I, an intron-encoded endonuclease specific for genes for ribosomal RNA, in Salmonella spp., Escherichia coli, and other bacteria. Proc Natl Acad Sci U S A. 1993 Jul 15;90(14):6874–6878. doi: 10.1073/pnas.90.14.6874. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Liu S. L., Hessel A., Sanderson K. E. The XbaI-BlnI-CeuI genomic cleavage map of Salmonella typhimurium LT2 determined by double digestion, end labelling, and pulsed-field gel electrophoresis. J Bacteriol. 1993 Jul;175(13):4104–4120. doi: 10.1128/jb.175.13.4104-4120.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Liu S. L., Sanderson K. E. A physical map of the Salmonella typhimurium LT2 genome made by using XbaI analysis. J Bacteriol. 1992 Mar;174(5):1662–1672. doi: 10.1128/jb.174.5.1662-1672.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Liu S. L., Sanderson K. E. Rearrangements in the genome of the bacterium Salmonella typhi. Proc Natl Acad Sci U S A. 1995 Feb 14;92(4):1018–1022. doi: 10.1073/pnas.92.4.1018. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Marshall P., Davis T. B., Lemieux C. The I-CeuI endonuclease: purification and potential role in the evolution of Chlamydomonas group I introns. Eur J Biochem. 1994 Mar 15;220(3):855–859. doi: 10.1111/j.1432-1033.1994.tb18688.x. [DOI] [PubMed] [Google Scholar]
- Muscarella D. E., Vogt V. M. A mobile group I intron in the nuclear rDNA of Physarum polycephalum. Cell. 1989 Feb 10;56(3):443–454. doi: 10.1016/0092-8674(89)90247-x. [DOI] [PubMed] [Google Scholar]
- Sanderson K. E. Genetic relatedness in the family Enterobacteriaceae. Annu Rev Microbiol. 1976;30:327–349. doi: 10.1146/annurev.mi.30.100176.001551. [DOI] [PubMed] [Google Scholar]
- ZINDER N. D., LEDERBERG J. Genetic exchange in Salmonella. J Bacteriol. 1952 Nov;64(5):679–699. doi: 10.1128/jb.64.5.679-699.1952. [DOI] [PMC free article] [PubMed] [Google Scholar]