NDLI: Three retrotransposon families in the genome of Giardia lamblia: Two telomeric, one dead

Content Provider	PubMed Central
Author	Arkhipova, Irina R. Morrison, Hilary G.
Copyright Year	2001
Abstract	Transposable elements inhabiting eukaryotic genomes are generally regarded either as selfish DNA, which is selectively neutral to the host organism, or as parasitic DNA, deleterious to the host. Thus far, the only agreed-upon example of beneficial eukaryotic transposons is provided by Drosophila telomere-associated retrotransposons, which transpose directly to the chromosome ends and thereby protect them from degradation. This article reports the transposon content of the genome of the protozoan Giardia lamblia, one of the earliest-branching eukaryotes. A total of three non-long terminal repeat retrotransposon families have been identified, two of which are located at the ends of chromosomes, and the third one contains exclusively dead copies with multiple internal deletions, nucleotide substitutions, and frame shifts. No other reverse transcriptase- or transposase-related sequences were found. Thus, the entire genome of this protozoan, which is not known to reproduce sexually, contains only retrotransposons that are either confined to telomeric regions and possibly beneficial, or inactivated and completely nonfunctional.
Related Links	http://dx.doi.org/10.1073/pnas.231494798
Ending Page	14502
Page Count	6
Starting Page	14497
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	25
Volume Number	98
Language	English
Publisher	The National Academy of Sciences
Publisher Date	2001-12-04
Access Restriction	Open
Rights Holder	The National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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Three retrotransposon families in the genome of Giardia lamblia: two telomeric, one dead.

A spliceosomal intron in Giardia lamblia

A single-stranded RNA copy of the Giardia lamblia virus double-stranded RNA genome is present in the infected Giardia lamblia.

Transfection of the Giardia lamblia double-stranded RNA virus into giardia lamblia by electroporation of a single-stranded RNA copy of the viral genome.

A dual-specificity aminoacyl-tRNA synthetase in the deep-rooted eukaryote Giardia lamblia

High-speed microscopic imaging of flagella motility and swimming in Giardia lamblia trophozoites.

Intracellular targeting of telomeric retrotransposon Gag proteins of distantly related Drosophila species

Cholesterol starvation induces differentiation of the intestinal parasite Giardia lamblia.

Both endo-siRNAs and tRNA-derived small RNAs are involved in the differentiation of primitive eukaryote Giardia lamblia

Three retrotransposon families in the genome of Giardia lamblia: Two telomeric, one dead

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Three retrotransposon families in the genome of Giardia lamblia: two telomeric, one dead.

A spliceosomal intron in Giardia lamblia

A single-stranded RNA copy of the Giardia lamblia virus double-stranded RNA genome is present in the infected Giardia lamblia.

Transfection of the Giardia lamblia double-stranded RNA virus into giardia lamblia by electroporation of a single-stranded RNA copy of the viral genome.

A dual-specificity aminoacyl-tRNA synthetase in the deep-rooted eukaryote Giardia lamblia

High-speed microscopic imaging of flagella motility and swimming in Giardia lamblia trophozoites.

Intracellular targeting of telomeric retrotransposon Gag proteins of distantly related Drosophila species

Cholesterol starvation induces differentiation of the intestinal parasite Giardia lamblia.

Both endo-siRNAs and tRNA-derived small RNAs are involved in the differentiation of primitive eukaryote Giardia lamblia

Three retrotransposon families in the genome of Giardia lamblia: Two telomeric, one dead