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. 1989 Oct;171(10):5376–5385. doi: 10.1128/jb.171.10.5376-5385.1989

Cloning and characterization of a cluster of linked Bacillus subtilis late competence mutations.

M Albano 1, D A Dubnau 1
PMCID: PMC210375  PMID: 2551886

Abstract

We characterized a segment of chromosomal DNA from Bacillus subtilis that was required for the development of genetic competence. The chromosomal DNA was cloned from a group of genetically linked and phenotypically similar Tn917lac insertion mutants deficient in competence. This cluster of mutations defined the comG locus. Chromosomal DNA flanking each of the six insertions was cloned. Restriction maps of the cloned plasmids revealed that their chromosomal inserts consisted of overlapping fragments. These data, together with Southern blots of chromosomal DNA from the comG mutants, showed that the six Tn917lac comG insertions occurred in the following order: comG12, comG39, comG412, comG107, comG56, and comG210. Expression of the comG Tn917lac insertions was from a promoter located upstream from the first insertion, comG12. This was determined genetically and by low-resolution S1 nuclease mapping of the 3' terminus. The comG region spanned about 5 kilobase pairs, based on low-resolution S1 nuclease mapping of the transcription terminator and Northern blotting. The comG12 mutation had a partial epistatic effect on the expression of one other com locus, comE, but none of the other comG mutations affected expression of this or any other com gene tested. Based on these conclusions, and on its size and phenotype, the comG locus must be organized as a polycistronic operon that is subject to competence-specific regulation.

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Selected References

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  1. Albano M., Breitling R., Dubnau D. A. Nucleotide sequence and genetic organization of the Bacillus subtilis comG operon. J Bacteriol. 1989 Oct;171(10):5386–5404. doi: 10.1128/jb.171.10.5386-5404.1989. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Albano M., Hahn J., Dubnau D. Expression of competence genes in Bacillus subtilis. J Bacteriol. 1987 Jul;169(7):3110–3117. doi: 10.1128/jb.169.7.3110-3117.1987. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Anagnostopoulos C., Spizizen J. REQUIREMENTS FOR TRANSFORMATION IN BACILLUS SUBTILIS. J Bacteriol. 1961 May;81(5):741–746. doi: 10.1128/jb.81.5.741-746.1961. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Berk A. J., Sharp P. A. Sizing and mapping of early adenovirus mRNAs by gel electrophoresis of S1 endonuclease-digested hybrids. Cell. 1977 Nov;12(3):721–732. doi: 10.1016/0092-8674(77)90272-0. [DOI] [PubMed] [Google Scholar]
  5. Birnboim H. C., Doly J. A rapid alkaline extraction procedure for screening recombinant plasmid DNA. Nucleic Acids Res. 1979 Nov 24;7(6):1513–1523. doi: 10.1093/nar/7.6.1513. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Bolivar F., Rodriguez R. L., Greene P. J., Betlach M. C., Heyneker H. L., Boyer H. W., Crosa J. H., Falkow S. Construction and characterization of new cloning vehicles. II. A multipurpose cloning system. Gene. 1977;2(2):95–113. [PubMed] [Google Scholar]
  7. Cahn F. H., Fox M. S. Fractionation of transformable bacteria from ocompetent cultures of Bacillus subtilis on renografin gradients. J Bacteriol. 1968 Mar;95(3):867–875. doi: 10.1128/jb.95.3.867-875.1968. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Contente S., Dubnau D. Characterization of plasmid transformation in Bacillus subtilis: kinetic properties and the effect of DNA conformation. Mol Gen Genet. 1979 Jan 2;167(3):251–258. doi: 10.1007/BF00267416. [DOI] [PubMed] [Google Scholar]
  9. Dubnau D., Davidoff-Abelson R. Fate of transforming DNA following uptake by competent Bacillus subtilis. I. Formation and properties of the donor-recipient complex. J Mol Biol. 1971 Mar 14;56(2):209–221. doi: 10.1016/0022-2836(71)90460-8. [DOI] [PubMed] [Google Scholar]
  10. Dubnau D., Davidoff-Abelson R., Smith I. Transformation and transduction in Bacillus subtilis: evidence for separate modes of recombinant formation. J Mol Biol. 1969 Oct 28;45(2):155–179. doi: 10.1016/0022-2836(69)90097-7. [DOI] [PubMed] [Google Scholar]
  11. Favaloro J., Treisman R., Kamen R. Transcription maps of polyoma virus-specific RNA: analysis by two-dimensional nuclease S1 gel mapping. Methods Enzymol. 1980;65(1):718–749. doi: 10.1016/s0076-6879(80)65070-8. [DOI] [PubMed] [Google Scholar]
  12. Gryczan T. J., Israeli-Reches M., Dubnau D. Induction of macrolide-lincosamide-streptogramin B resistance requires ribosomes able to bind inducer. Mol Gen Genet. 1984;194(3):357–361. doi: 10.1007/BF00425544. [DOI] [PubMed] [Google Scholar]
  13. Hadden C., Nester E. W. Purification of competent cells in the Bacillus subtilis transformation system. J Bacteriol. 1968 Mar;95(3):876–885. doi: 10.1128/jb.95.3.876-885.1968. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Hahn J., Albano M., Dubnau D. Isolation and characterization of Tn917lac-generated competence mutants of Bacillus subtilis. J Bacteriol. 1987 Jul;169(7):3104–3109. doi: 10.1128/jb.169.7.3104-3109.1987. [DOI] [PMC free article] [PubMed] [Google Scholar]
  15. Israeli-Reches M., Weinrauch Y., Dubnau D. Evolutionary relationships of the Bacillus licheniformis macrolide-lincosamide-streptogramin B resistance elements. Mol Gen Genet. 1984;194(3):362–367. doi: 10.1007/BF00425545. [DOI] [PubMed] [Google Scholar]
  16. Mandel M., Higa A. Calcium-dependent bacteriophage DNA infection. J Mol Biol. 1970 Oct 14;53(1):159–162. doi: 10.1016/0022-2836(70)90051-3. [DOI] [PubMed] [Google Scholar]
  17. Maxam A. M., Gilbert W. Sequencing end-labeled DNA with base-specific chemical cleavages. Methods Enzymol. 1980;65(1):499–560. doi: 10.1016/s0076-6879(80)65059-9. [DOI] [PubMed] [Google Scholar]
  18. Messing J., Vieira J. A new pair of M13 vectors for selecting either DNA strand of double-digest restriction fragments. Gene. 1982 Oct;19(3):269–276. doi: 10.1016/0378-1119(82)90016-6. [DOI] [PubMed] [Google Scholar]
  19. Rigby P. W., Dieckmann M., Rhodes C., Berg P. Labeling deoxyribonucleic acid to high specific activity in vitro by nick translation with DNA polymerase I. J Mol Biol. 1977 Jun 15;113(1):237–251. doi: 10.1016/0022-2836(77)90052-3. [DOI] [PubMed] [Google Scholar]
  20. Southern E. M. Detection of specific sequences among DNA fragments separated by gel electrophoresis. J Mol Biol. 1975 Nov 5;98(3):503–517. doi: 10.1016/s0022-2836(75)80083-0. [DOI] [PubMed] [Google Scholar]
  21. TAKAHASHI I. Transducing phages for Bacillus subtilis. J Gen Microbiol. 1963 May;31:211–217. doi: 10.1099/00221287-31-2-211. [DOI] [PubMed] [Google Scholar]
  22. Ulmanen I., Lundström K., Lehtovaara P., Sarvas M., Ruohonen M., Palva I. Transcription and translation of foreign genes in Bacillus subtilis by the aid of a secretion vector. J Bacteriol. 1985 Apr;162(1):176–182. doi: 10.1128/jb.162.1.176-182.1985. [DOI] [PMC free article] [PubMed] [Google Scholar]
  23. Wahl G. M., Stern M., Stark G. R. Efficient transfer of large DNA fragments from agarose gels to diazobenzyloxymethyl-paper and rapid hybridization by using dextran sulfate. Proc Natl Acad Sci U S A. 1979 Aug;76(8):3683–3687. doi: 10.1073/pnas.76.8.3683. [DOI] [PMC free article] [PubMed] [Google Scholar]
  24. Yanisch-Perron C., Vieira J., Messing J. Improved M13 phage cloning vectors and host strains: nucleotide sequences of the M13mp18 and pUC19 vectors. Gene. 1985;33(1):103–119. doi: 10.1016/0378-1119(85)90120-9. [DOI] [PubMed] [Google Scholar]
  25. Youngman P. J., Perkins J. B., Losick R. Genetic transposition and insertional mutagenesis in Bacillus subtilis with Streptococcus faecalis transposon Tn917. Proc Natl Acad Sci U S A. 1983 Apr;80(8):2305–2309. doi: 10.1073/pnas.80.8.2305. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. Youngman P., Perkins J. B., Losick R. A novel method for the rapid cloning in Escherichia coli of Bacillus subtilis chromosomal DNA adjacent to Tn917 insertions. Mol Gen Genet. 1984;195(3):424–433. doi: 10.1007/BF00341443. [DOI] [PubMed] [Google Scholar]
  27. Youngman P., Zuber P., Perkins J. B., Sandman K., Igo M., Losick R. New ways to study developmental genes in spore-forming bacteria. Science. 1985 Apr 19;228(4697):285–291. doi: 10.1126/science.228.4697.285. [DOI] [PubMed] [Google Scholar]

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