Abstract
Insertion of the transposable genetic element Tn 1 into different sites of plasmid ColE1 results in a number of mutant phenotypes. Whereas all plasmids examined were present in normal amount, all showed reduced immunity to killing by colicin E1. Of six insertions isolated after conjugation, five fail to produce colicin, are conjugally proficient (transmissible), and map within a 500 nucleotide region of the genome. The other is conjugally deficient, produces colicin normally and maps close to two others with a similar phenotype isolated after transformation. Of four others isolated after transformation, two have similar properties to the original five transmissible plasmids. The other two are nontransmissible and produce colicin. Non-transmissibility is correlated with reduced relaxation complex. Patterns of protein synthesis in minicels by ColE1 and ColE1:: Tn 1 plasmids have been examined: all ColE1 plasmids containing Tn 1 show an altered pattern of ColE1 protein synthesis in addition to three presumptive Tn 1-specified proteins, one of which is shown to be β-lactamase. ColE1:: Tn 1 plasmids can be inserted into the conjugative plasmid R64 drd11 to form a cointegrate in which ColE1 and Tn 1 function can be expressed.
| Original language | English |
|---|---|
| Pages (from-to) | 151-160 |
| Number of pages | 10 |
| Journal | Molecular and General Genetics |
| Volume | 151 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 Jan 1977 |
| Externally published | Yes |
Cite this
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The transposon Tn 1 as a probe for studying ColE1 structure and function. / Dougan, Gordon; Sherratt, David.
In: Molecular and General Genetics, Vol. 151, No. 2, 01.01.1977, p. 151-160.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - The transposon Tn 1 as a probe for studying ColE1 structure and function
AU - Dougan, Gordon
AU - Sherratt, David
PY - 1977/1/1
Y1 - 1977/1/1
N2 - Insertion of the transposable genetic element Tn 1 into different sites of plasmid ColE1 results in a number of mutant phenotypes. Whereas all plasmids examined were present in normal amount, all showed reduced immunity to killing by colicin E1. Of six insertions isolated after conjugation, five fail to produce colicin, are conjugally proficient (transmissible), and map within a 500 nucleotide region of the genome. The other is conjugally deficient, produces colicin normally and maps close to two others with a similar phenotype isolated after transformation. Of four others isolated after transformation, two have similar properties to the original five transmissible plasmids. The other two are nontransmissible and produce colicin. Non-transmissibility is correlated with reduced relaxation complex. Patterns of protein synthesis in minicels by ColE1 and ColE1:: Tn 1 plasmids have been examined: all ColE1 plasmids containing Tn 1 show an altered pattern of ColE1 protein synthesis in addition to three presumptive Tn 1-specified proteins, one of which is shown to be β-lactamase. ColE1:: Tn 1 plasmids can be inserted into the conjugative plasmid R64 drd11 to form a cointegrate in which ColE1 and Tn 1 function can be expressed.
AB - Insertion of the transposable genetic element Tn 1 into different sites of plasmid ColE1 results in a number of mutant phenotypes. Whereas all plasmids examined were present in normal amount, all showed reduced immunity to killing by colicin E1. Of six insertions isolated after conjugation, five fail to produce colicin, are conjugally proficient (transmissible), and map within a 500 nucleotide region of the genome. The other is conjugally deficient, produces colicin normally and maps close to two others with a similar phenotype isolated after transformation. Of four others isolated after transformation, two have similar properties to the original five transmissible plasmids. The other two are nontransmissible and produce colicin. Non-transmissibility is correlated with reduced relaxation complex. Patterns of protein synthesis in minicels by ColE1 and ColE1:: Tn 1 plasmids have been examined: all ColE1 plasmids containing Tn 1 show an altered pattern of ColE1 protein synthesis in addition to three presumptive Tn 1-specified proteins, one of which is shown to be β-lactamase. ColE1:: Tn 1 plasmids can be inserted into the conjugative plasmid R64 drd11 to form a cointegrate in which ColE1 and Tn 1 function can be expressed.
UR - http://www.scopus.com/inward/record.url?scp=0017640242&partnerID=8YFLogxK
U2 - 10.1007/BF00338689
DO - 10.1007/BF00338689
M3 - Article
VL - 151
SP - 151
EP - 160
JO - Molecular Genetics and Genomics
JF - Molecular Genetics and Genomics
SN - 1617-4615
IS - 2
ER -