PMID- 17384307 OWN - NLM STAT- MEDLINE DCOM- 20071026 LR - 20181113 IS - 0099-2240 (Print) IS - 1098-5336 (Electronic) IS - 0099-2240 (Linking) VI - 73 IP - 10 DP - 2007 May TI - High-frequency phage-mediated gene transfer among Escherichia coli cells, determined at the single-cell level. PG - 3291-9 AB - Recent whole-genome analysis suggests that lateral gene transfer by bacteriophages has contributed significantly to the genetic diversity of bacteria. To accurately determine the frequency of phage-mediated gene transfer, we employed cycling primed in situ amplification-fluorescent in situ hybridization (CPRINS-FISH) and investigated the movement of the ampicillin resistance gene among Escherichia coli cells mediated by phage at the single-cell level. Phages P1 and T4 and the newly isolated E. coli phage EC10 were used as vectors. The transduction frequencies determined by conventional plating were 3x10(-8) to 2x10(-6), 1x10(-8) to 4x10(-8), and <4x10(-9) to 4x10(-8) per PFU for phages P1, T4, and EC10, respectively. The frequencies of DNA transfer determined by CPRINS-FISH were 7x10(-4) to 1x10(-3), 9x10(-4) to 3x10(-3), and 5x10(-4) to 4x10(-3) for phages P1, T4, and EC10, respectively. Direct viable counting combined with CPRINS-FISH revealed that more than 20% of the cells carrying the transferred gene retained their viabilities. These results revealed that the difference in the number of viable cells carrying the transferred gene and the number of cells capable of growth on the selective medium was 3 to 4 orders of magnitude, indicating that phage-mediated exchange of DNA sequences among bacteria occurs with unexpectedly high frequency. FAU - Kenzaka, Takehiko AU - Kenzaka T AD - Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Osaka 565-0871, Japan. FAU - Tani, Katsuji AU - Tani K FAU - Sakotani, Akiko AU - Sakotani A FAU - Yamaguchi, Nobuyasu AU - Yamaguchi N FAU - Nasu, Masao AU - Nasu M LA - eng SI - GENBANK/AY819041 SI - GENBANK/AY819042 SI - GENBANK/AY819043 SI - GENBANK/AY819044 PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20070323 PL - United States TA - Appl Environ Microbiol JT - Applied and environmental microbiology JID - 7605801 RN - 0 (DNA, Viral) SB - IM MH - Ampicillin Resistance/genetics MH - Bacteriophage P1/genetics/physiology MH - Bacteriophage T4/genetics/physiology MH - Base Sequence MH - Coliphages/*genetics/physiology MH - Colony Count, Microbial MH - DNA, Viral/chemistry/genetics MH - Escherichia coli/*genetics/physiology/*virology MH - *Gene Transfer, Horizontal MH - Genetic Vectors MH - In Situ Hybridization, Fluorescence/methods MH - Microbial Viability MH - Molecular Sequence Data MH - Sequence Analysis MH - *Transduction, Genetic MH - Viral Plaque Assay PMC - PMC1907122 EDAT- 2007/03/27 09:00 MHDA- 2007/10/30 09:00 PMCR- 2007/09/01 CRDT- 2007/03/27 09:00 PHST- 2007/03/27 09:00 [pubmed] PHST- 2007/10/30 09:00 [medline] PHST- 2007/03/27 09:00 [entrez] PHST- 2007/09/01 00:00 [pmc-release] AID - AEM.02890-06 [pii] AID - 2890-06 [pii] AID - 10.1128/AEM.02890-06 [doi] PST - ppublish SO - Appl Environ Microbiol. 2007 May;73(10):3291-9. doi: 10.1128/AEM.02890-06. Epub 2007 Mar 23.