Structural analysis of Tam3, a transposable element from Antirrhinum majus, reveals homologies to the Ac element from maize

1991 ◽  
Vol 16 (2) ◽  
pp. 369-371 ◽  
Author(s):  
Reinhard Hehl ◽  
Wolfgang K. F. Nacken ◽  
Andrea Krause ◽  
Heinz Saedler ◽  
Hans Sommer
Keyword(s):  
Structural Analysis ◽  
Transposable Element ◽  
Antirrhinum Majus ◽  
Ac Element

De novo activation of the transposable element Tam2 of Antirrhinum majus

1987 ◽  
Vol 207 (1) ◽  
pp. 54-59 ◽  
Author(s):  
Andrew Hudson ◽  
Rosemary Carpenter ◽  
Enrico S. Coen
Keyword(s):  
Transposable Element ◽  
De Novo ◽  
Antirrhinum Majus

The transposable element Tam1 of Antirrhinum majus is 17 kb long

1984 ◽  
Vol 194 (1-2) ◽  
pp. 138-143 ◽  
Author(s):  
Ulla Bonas ◽  
Hans Sommer ◽  
Brian J. Harrison ◽  
Heinz Saedler
Keyword(s):  
Transposable Element ◽  
Antirrhinum Majus

scholarly journals Ac induces homologous recombination at the maize P locus.

Genetics ◽  
1991 ◽  
Vol 128 (1) ◽  
pp. 163-173 ◽  
Author(s):  
P Athma ◽  
T Peterson
Keyword(s):  
Homologous Recombination ◽  
Transposable Element ◽  
Direct Repeat ◽  
Null Alleles ◽  
Direct Repeats ◽  
Ac Element ◽  
Repeat Sequences ◽  
P Gene ◽  
In Trans ◽  
P Locus

Abstract The maize P gene conditions red phlobaphene pigmentation to the pericarp and cob. Starting from two unstable P alleles which carry insertions of the transposable element Ac, we have derived 51 P null alleles; 47 of the 51 null alleles have a 17-kb deletion which removes the 4.5-kb Ac element and 12.5 kb of P sequences flanking both sides of Ac. The deletion endpoints lie within two 5.2-kb homologous direct repeats which flank the P gene. A P allele which contains the direct repeats, but does not have an Ac insertion between the direct repeats, shows very little sporophytic or gametophytic instability. The apparent frequency of sporophytic mutations was not increased when Ac was introduced in trans. Southern analysis of DNA prepared from the pericarp tissue demonstrates that the deletions can occur premeiotically, in the somatic cells during development of the pericarp. Evidence is presented that the deletions occurred by homologous recombination between the two direct repeats, and that the presence of an Ac element at the P locus is associated with the recombination/deletion. These results add another aspect to the spectrum of activities of Ac: the destabilization of flanking direct repeat sequences.

The transposable element Tam3 of Antirrhinum majus generates a novel type of sequence alterations upon excision

1985 ◽  
Vol 199 (2) ◽  
pp. 225-231 ◽  
Author(s):  
Hans Sommer ◽  
Rosemary Carpenter ◽  
Brian J. Harrison ◽  
Heinz Saedler
Keyword(s):  
Transposable Element ◽  
Antirrhinum Majus

scholarly journals Large-scale chromosomal restructuring is induced by the transposable element tam3 at the nivea locus of antirrhinum majus.

Genetics ◽  
1988 ◽  
Vol 119 (1) ◽  
pp. 171-184
Author(s):  
C Martin ◽  
S Mackay ◽  
R Carpenter
Keyword(s):  
Transposable Element ◽  
Large Scale ◽  
Molecular Level ◽  
Chromosomal Rearrangements ◽  
Low Frequency ◽  
Antirrhinum Majus ◽  
Inverted Duplication ◽  
Imprecise Excision ◽  
Flanking Sequences

Abstract The transposable element, Tam3, gives rise to large-scale (greater than 1 kb) chromosomal rearrangements at a low frequency, when it is inserted at the nivea locus of Antirrhinum majus. Although some deletions may result from imprecise excision of Tam3, rearrangements involving deletion, dispersion and inverted duplication of flanking sequences, where Tam3 remains in situ, have also been identified. These rearrangements have been mapped at the molecular level, and the behavior of Tam3 following rearrangement has been observed. It is clear that Tam3 has enormous potential to restructure chromosomes through successive rounds of large-scale rearrangements. The mechanisms by which such rearrangements might arise are discussed.

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