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. 1971 Aug;68(8):1848–1852. doi: 10.1073/pnas.68.8.1848

DNA Uptake during Genetic Transformation and the Growing Zone of the Cell Envelope

Alexander Tomasz 1, Eva Zanati 1, Richard Ziegler 1
PMCID: PMC389306  PMID: 4399665

Abstract

Continuous cellular incorporation of choline molecules is essential for DNA binding to competent pneumococci. The choline molecules are incorporated into the cell surface at the equatorial region of the cocci. As a working hypothesis, it is proposed that DNA molecules enter these bacteria at the growing zone(s) of the cell envelope.

Keywords: pneumococcus, electron microscopy, choline, ethanolamine, autoradiography

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Briles E. B., Tomasz A. Radioautographic evidence for equatorial wall growth in a gram-positive bacterium. Segregation of choline-3H-labeled teichoic acid. J Cell Biol. 1970 Dec;47(3):786–790. doi: 10.1083/jcb.47.3.786. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Javor G. T., Tomasz A. An autoradiographic study of genetic transformation. Proc Natl Acad Sci U S A. 1968 Aug;60(4):1216–1222. doi: 10.1073/pnas.60.4.1216. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. LERMAN L. S., TOLMACH L. J. Genetic transformation. I. Cellular incorporation of DNA accompanying transformation in Pneumococcus. Biochim Biophys Acta. 1957 Oct;26(1):68–82. doi: 10.1016/0006-3002(57)90055-0. [DOI] [PubMed] [Google Scholar]
  4. Mosser J. L., Tomasz A. Choline-containing teichoic acid as a structural component of pneumococcal cell wall and its role in sensitivity to lysis by an autolytic enzyme. J Biol Chem. 1970 Jan 25;245(2):287–298. [PubMed] [Google Scholar]
  5. Rane L., Subbarow Y. Nutritional Requirements of the Pneumococcus: I. Growth Factors for Types I, II, V, VII, VIII. J Bacteriol. 1940 Nov;40(5):695–704. doi: 10.1128/jb.40.5.695-704.1940. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Ranhand J. M., Leonard C. G., Cole R. M. Autolytic activity associated with competent group H streptococci. J Bacteriol. 1971 Apr;106(1):257–268. doi: 10.1128/jb.106.1.257-268.1971. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Shockman G. D., Pooley H. M., Thompson J. S. Autolytic enzyme system of Streptococcus faecalis. 3. Localization of the autolysin at the sites of cell wall synthesis. J Bacteriol. 1967 Nov;94(5):1525–1530. doi: 10.1128/jb.94.5.1525-1530.1967. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. TOMASZ A., HOTCHKISS R. D. REGULATION OF THE TRANSFORMABILITY OF PHEUMOCOCCAL CULTURES BY MACROMOLECULAR CELL PRODUCTS. Proc Natl Acad Sci U S A. 1964 Mar;51:480–487. doi: 10.1073/pnas.51.3.480. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Tomasz A., Albino A., Zanati E. Multiple antibiotic resistance in a bacterium with suppressed autolytic system. Nature. 1970 Jul 11;227(5254):138–140. doi: 10.1038/227138a0. [DOI] [PubMed] [Google Scholar]
  10. Tomasz A. Biological consequences of the replacement of choline by ethanolamine in the cell wall of Pneumococcus: chanin formation, loss of transformability, and loss of autolysis. Proc Natl Acad Sci U S A. 1968 Jan;59(1):86–93. doi: 10.1073/pnas.59.1.86. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Tomasz A. Cellular metabolism in genetic transformation of pneumococci: requirement for protein synthesis during induction of competence. J Bacteriol. 1970 Mar;101(3):860–871. doi: 10.1128/jb.101.3.860-871.1970. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Tomasz A. Choline in the cell wall of a bacterium: novel type of polymer-linked choline in Pneumococcus. Science. 1967 Aug 11;157(3789):694–697. doi: 10.1126/science.157.3789.694. [DOI] [PubMed] [Google Scholar]
  13. Tomasz A., Mosser J. L. On the nature of the pneumococcal activator substance. Proc Natl Acad Sci U S A. 1966 Jan;55(1):58–66. doi: 10.1073/pnas.55.1.58. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Ziegler R., Tomasz A. Binding of the competence factor to receptors in the spheroplast membrane of pneumococci. Biochem Biophys Res Commun. 1970 Dec 9;41(5):1342–1349. doi: 10.1016/0006-291x(70)90236-6. [DOI] [PubMed] [Google Scholar]

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