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Terminal-Repeat Retrotransposons with GAG Domain in Plant Genomes: A New Testimony on the Complex World of Transposable Elements.
- Source :
- Genome Biology & Evolution; Feb2015, Vol. 7 Issue 2, p493-504, 12p
- Publication Year :
- 2015
-
Abstract
- A novel structure of nonautonomous long terminal repeat (LTR) retrotransposons called terminal repeat with GAG domain (TR-GAG) has been described in plants, both in monocotyledonous, dicotyledonous and basal angiosperm genomes. TR-GAGs are relatively short elements in length (<4 kb) showing the typical features of LTR-retrotransposons. However, they carry only one open reading frame coding for the GAG precursor protein involved for instance in transposition, the assembly, and the packaging of the element into the virus-like particle. GAG precursors show similarities with both Copia and Gypsy GAG proteins, suggesting evolutionary relationships of TR-GAG elements with both families. Despite the lack of the enzymatic machinery required for their mobility, strong evidences suggest that TR-GAGs are still active. TR-GAGs represent ubiquitous nonautonomous structures that could be involved in the molecular diversities of plant genomes. [ABSTRACT FROM AUTHOR]
- Subjects :
- RETROTRANSPOSONS
TRANSPOSONS
GENOME size
GENOTYPES
HAPLOIDY
Subjects
Details
- Language :
- English
- ISSN :
- 17596653
- Volume :
- 7
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Genome Biology & Evolution
- Publication Type :
- Academic Journal
- Accession number :
- 101451594
- Full Text :
- https://doi.org/10.1093/gbe/evv001