Phage adsorption and productive lysis in stable protoplast type L-forms of Bacillus subtilis and Streptomyces hygroscopicus
✍ Scribed by Dr. J. Gumpert; I. Zimmermann; U. Taubeneck
- Book ID
- 102910055
- Publisher
- John Wiley and Sons
- Year
- 1986
- Tongue
- English
- Weight
- 897 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0233-111X
No coin nor oath required. For personal study only.
✦ Synopsis
Transferable productive lysis in stable protoplast type L-form cells of Bacillus subtilie was produced by 6 phages out of 14 strains virulent for the parent B. subtilis 170 and 1997. Most of these phages lytic for L-forms show the @ 29 morphology characteristic for the smallest 3. .dtdlis phages containing double-stranded DNA. Among 31 actinophages, 23 of which were virulent for Streptomyces hygroswpkw, only SLE 109 and @c 31 gave productive infection of the stable protoplast type L-form of S. hygroscopicus NG 33-354.
Electron microscopic investigation and treatment by DNAse demonstrated that infection of Lform cells is an adsorption-injection process, and that i t is not caused by transfection of free phage DNA or endocytotic uptake of phage particles. Because in both stable L-forms cell wall biosynthesis is blocked irreversibly the results allow the conclusion that specific receptors must be localized in the cytoplasmic membrane for those phages producing transferable lysis in protoplast type L-forms. Localization of receptors for certain phages in the cytoplasmic membrane seems to occur in many Gram-positive bacteria, but not in Gram-negative bacteria.