Abstract
Previously, we demonstrated conjugal transfer of a specially constructed shuttle vector, pRDB5, from the human colonic anaerobe Bacteroides uniformis to the ruminal anaerobe Prevotella (Bacteroides) ruminicola B(1)4. We have now shown that naturally occurring gene transfer elements in Bacteroides species and Prevotella ruminicola can also be transferred between these two genera. A self-transmissible chromosomal element originally found in a clinical isolate of Bacteroides fragilis (Tcr Emr 12256) was transferred from B. uniformis 0061 to P. ruminicola B(1)4 and from P. ruminicola B(1)4 back to B. uniformis or to another human colonic species, Bacteroides thetaiotaomicron. Similarly, a conjugative plasmid (pRRI4) originally found in P. ruminicola 223 was transferred from P. ruminicola B(1)4 to B. uniformis or B. thetaiotaomicron. pRRI4 could be transferred from the colonic Bacteroides species only if the donor strain contained the Tcr Emr 12256 element in its chromosome. These results show that transfer of naturally occurring elements can be demonstrated under laboratory conditions. Evidence that such transfers may actually have occurred in nature came from our finding that the tetracycline resistance (Tcr) gene on the P. ruminicola plasmid pRRI4 hybridized on high-stringency Southern blots with the Tcr gene found on the Bacteroides Tcr elements. The presence of the same gene in such distantly related genera of bacteria is most likely to have occurred as a result of horizontal transfer.
Full text
PDF







Images in this article
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Bedzyk L. A., Shoemaker N. B., Young K. E., Salyers A. A. Insertion and excision of Bacteroides conjugative chromosomal elements. J Bacteriol. 1992 Jan;174(1):166–172. doi: 10.1128/jb.174.1.166-172.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Bertram J., Strätz M., Dürre P. Natural transfer of conjugative transposon Tn916 between gram-positive and gram-negative bacteria. J Bacteriol. 1991 Jan;173(2):443–448. doi: 10.1128/jb.173.2.443-448.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Cohen M. L., Tauxe R. V. Drug-resistant Salmonella in the United States: an epidemiologic perspective. Science. 1986 Nov 21;234(4779):964–969. doi: 10.1126/science.3535069. [DOI] [PubMed] [Google Scholar]
- Flint H. J., Thomson A. M., Bisset J. Plasmid-associated transfer of tetracycline resistance in Bacteroides ruminicola. Appl Environ Microbiol. 1988 Apr;54(4):855–860. doi: 10.1128/aem.54.4.855-860.1988. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Guiney D. G., Bouic K. Detection of conjugal transfer systems in oral, black-pigmented Bacteroides spp. J Bacteriol. 1990 Jan;172(1):495–497. doi: 10.1128/jb.172.1.495-497.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hespell R. B., Whitehead T. R. Conjugal transfer of Tn916, Tn916 delta E, and pAM beta 1 from Enterococcus faecalis to Butyrivibrio fibrisolvens strains. Appl Environ Microbiol. 1991 Sep;57(9):2703–2709. doi: 10.1128/aem.57.9.2703-2709.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Holdeman L. V., Good I. J., Moore W. E. Human fecal flora: variation in bacterial composition within individuals and a possible effect of emotional stress. Appl Environ Microbiol. 1976 Mar;31(3):359–375. doi: 10.1128/aem.31.3.359-375.1976. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Holmberg S. D., Osterholm M. T., Senger K. A., Cohen M. L. Drug-resistant Salmonella from animals fed antimicrobials. N Engl J Med. 1984 Sep 6;311(10):617–622. doi: 10.1056/NEJM198409063111001. [DOI] [PubMed] [Google Scholar]
- Odelson D. A., Rasmussen J. L., Smith C. J., Macrina F. L. Extrachromosomal systems and gene transmission in anaerobic bacteria. Plasmid. 1987 Mar;17(2):87–109. doi: 10.1016/0147-619x(87)90016-3. [DOI] [PubMed] [Google Scholar]
- SAITO H., MIURA K. I. PREPARATION OF TRANSFORMING DEOXYRIBONUCLEIC ACID BY PHENOL TREATMENT. Biochim Biophys Acta. 1963 Aug 20;72:619–629. [PubMed] [Google Scholar]
- Salyers A. A., Shoemaker N. B., Guthrie E. P. Recent advances in Bacteroides genetics. Crit Rev Microbiol. 1987;14(1):49–71. doi: 10.3109/10408418709104435. [DOI] [PubMed] [Google Scholar]
- Salyers A. A., Speer B. S., Shoemaker N. B. New perspectives in tetracycline resistance. Mol Microbiol. 1990 Jan;4(1):151–156. doi: 10.1111/j.1365-2958.1990.tb02025.x. [DOI] [PubMed] [Google Scholar]
- Shah H. N., Collins D. M. Prevotella, a new genus to include Bacteroides melaninogenicus and related species formerly classified in the genus Bacteroides. Int J Syst Bacteriol. 1990 Apr;40(2):205–208. doi: 10.1099/00207713-40-2-205. [DOI] [PubMed] [Google Scholar]
- Shoemaker N. B., Anderson K. L., Smithson S. L., Wang G. R., Salyers A. A. Conjugal transfer of a shuttle vector from the human colonic anaerobe Bacteroides uniformis to the ruminal anaerobe Prevotella (Bacteroides) ruminicola B(1)4. Appl Environ Microbiol. 1991 Aug;57(8):2114–2120. doi: 10.1128/aem.57.8.2114-2120.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Shoemaker N. B., Barber R. D., Salyers A. A. Cloning and characterization of a Bacteroides conjugal tetracycline-erythromycin resistance element by using a shuttle cosmid vector. J Bacteriol. 1989 Mar;171(3):1294–1302. doi: 10.1128/jb.171.3.1294-1302.1989. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Shoemaker N. B., Salyers A. A. A cryptic 65-kilobase-pair transposonlike element isolated from Bacteroides uniformis has homology with Bacteroides conjugal tetracycline resistance elements. J Bacteriol. 1990 Apr;172(4):1694–1702. doi: 10.1128/jb.172.4.1694-1702.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Spika J. S., Waterman S. H., Hoo G. W., St Louis M. E., Pacer R. E., James S. M., Bissett M. L., Mayer L. W., Chiu J. Y., Hall B. Chloramphenicol-resistant Salmonella newport traced through hamburger to dairy farms. A major persisting source of human salmonellosis in California. N Engl J Med. 1987 Mar 5;316(10):565–570. doi: 10.1056/NEJM198703053161001. [DOI] [PubMed] [Google Scholar]
- Stevens A. M., Shoemaker N. B., Salyers A. A. The region of a Bacteroides conjugal chromosomal tetracycline resistance element which is responsible for production of plasmidlike forms from unlinked chromosomal DNA might also be involved in transfer of the element. J Bacteriol. 1990 Aug;172(8):4271–4279. doi: 10.1128/jb.172.8.4271-4279.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Valentine P. J., Shoemaker N. B., Salyers A. A. Mobilization of Bacteroides plasmids by Bacteroides conjugal elements. J Bacteriol. 1988 Mar;170(3):1319–1324. doi: 10.1128/jb.170.3.1319-1324.1988. [DOI] [PMC free article] [PubMed] [Google Scholar]



