Transfection of Escherichia coli and Salmonella typhimurium Spheroplasts: Host-Controlled Restriction of Infective Bacteriophage P22 Deoxyribonucleic Acid
AUTOR(ES)
Benzinger, Rolf
RESUMO
Under proper conditions, one infective center was obtained for 3 × 108 molecules of P22 phage deoxyribonucleic acid (DNA) when lysozyme-ethylenediaminetetraacetic acid spheroplasts of Escherichia coli were transfected in the presence of 25 μg of protamine sulfate per ml. A 3- to 50-fold B-specific and K-specific E. coli restriction of the incoming P22 DNA was observed. When P22 DNA-infected E. coli spheroplasts were plated with infertile rLT+mLT+Salmonella typhimurium indicator, an additional 70-fold restriction was observed. In the presence of protamine sulfate, penicillin spheroplasts of S. typhimurium SB1330 could be transfected b P22 DNA with efficiencies sometimes approaching those obtained with the E. coli spheroplasts; thus, facilitation of transfection by protamine sulfate is not limited to E. coli or to lysozyme-ethylenediaminetetraacetic acid spheroplasts. The application of these results to studies of transfection among other genuses and to studies of in vitro host-controlled restriction and modification for the two loci in S. typhimurium and the one locus in E. coli is discussed.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=356231Documentos Relacionados
- Genetics of Host-Controlled Restriction and Modification of Deoxyribonucleic Acid in Escherichia coli
- Change in Methylation of Salmonella Bacteriophage P3 Deoxyribonucleic Acid with Host-Controlled Modification by Escherichia coli1
- Host-Controlled Modification and Restriction of Bacteriophage T7 by Escherichia coli B
- Loss of Host-controlled Restriction of λ Bacteriophage in Escherichia coli Following Methionine Deprivation 1
- Multiplication of Bacteriophage P22 in Penicillin-Induced Spheroplasts of Salmonella typhimurium