Nakcen WK et al. 1991a
- Authors:
Nacken WK. Piotrowiak R. Saedler H. Sommer H.
- Title:
The transposable element Tam1 from Antirrhinum majus shows structural
homology to the maize transposon En/Spm and has no sequence specificity of
insertion.
- Reference location:
Molecular & General Genetics. 228(1-2):201-8, 1991 Aug.
- Abstract:
We present the genomic structure of Tam1, a transposable element from
Antirrhinum majus. The Tam1 element is 15.2 kb long and includes two genes
that are transcribed to produce a 2.4 kb (tnp1) and a 5 kb mRNA (tnp2).
These transcripts partially overlap and the exons are scattered over the
whole element. Tnp1 encodes a 53 kDa protein as deduced from the cDNA
sequence. The 5 kb transcript of tnp2 contains an open reading frame that
shares 45% homology with part of the tnpD gene of En/Spm from maize and
48% homology with an open reading frame of the Tgm element from Glycine
max. We discuss the possible functions of these genes by analogy with
En/Spm. Additionally, a number of flanking sequences of Tam1 insertions
were analysed to investigate the sequence specificity of insertion. From
these studies we conclude that Tam1 transposes predominantly into AT-rich
regions that can be unique as well as repetitive. No specific target
sequence of insertion could be found.
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