Human-like telomeres in Zostera marina reveal a mode of transition from the plant to the human telomeric sequences

@article{Peka2020HumanlikeTI,
  title={Human-like telomeres in Zostera marina reveal a mode of transition from the plant to the human telomeric sequences},
  author={Vratislav Pe{\vs}ka and Martin M{\'a}tl and Terezie Mand{\'a}kov{\'a} and Daniel Vitales and Petr Fajkus and Jiř{\'i} Fajkus and S{\`o}nia Garcia},
  journal={bioRxiv},
  year={2020}
}
A previous study describing the genome of Zostera marina, the most widespread seagrass in the Northern hemisphere, revealed some genomic signatures of adaptation to the aquatic environment. Important features related to the ‘back-to-the-sea’ reverse evolutionary pathway were found, such as the loss of stomatal genes, while other functions like an algal-like cell wall composition were acquired. Beyond these, the genome structure and organization were comparable to the majority of plant genomes… 
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References

SHOWING 1-10 OF 27 REFERENCES
Dynamic Evolution of Telomeric Sequences in the Green Algal Order Chlamydomonadales
TLDR
The results support the view that the Arabidopsis-type telomeric sequence is ancestral for green algae and has been conserved in most lineages and indicate that telomere evolution in green algae, particularly in the order Chlamydomonadales, is far more dynamic and complex than thought before.
Aloe spp. – plants with vertebrate-like telomeric sequences
Chromosome termini of most eukaryotes end in tracks of short tandemly repeated GC-rich sequences, the composition of which varies among different groups of organisms. Plant species predominantly
A Broad Phylogenetic Survey Unveils the Diversity and Evolution of Telomeres in Eukaryotes
TLDR
Analysis of genomic data from major eukaryotic lineages and genome assemblies from on-going genome projects for representatives of three hitherto unsampled lineages confirm the human-type repeat as the most common and possibly ancestral in eucaryotes, but alternative motifs replaced it along the phylogeny of diverse eukarian lineages.
Telomerase RNAs in land plants
TLDR
The finding of a monophyletic origin of genuine TRs across land plants opens the possibility to identify TRs directly in transcriptomic or genomic data and/or predict telomere sequences synthesized according to the respective TR template region.
Origin, Diversity, and Evolution of Telomere Sequences in Plants
TLDR
An overview of telomere sequences is provided, considering the latest phylogenomic evolutionary framework of plants in the broad sense (Archaeplastida), in which new telomeric sequences have recently been found in diverse and economically important families such as Solanaceae and Amaryllidaceae.
The genome of the seagrass Zostera marina reveals angiosperm adaptation to the sea
TLDR
The genome of Zostera marina, the first, to the authors' knowledge, marine angiosperm to be fully sequenced, reveals unique insights into the genomic losses and gains involved in achieving the structural and physiological adaptations required for its marine lifestyle.
Telomere variability in the monocotyledonous plant order Asparagales
TLDR
The data indicate that the Asparagales clade is unified by a mutation resulting in a switch from synthesis of Arabidopsis–like telomeres to a low–fidelity synthesis of human–liketelomeres.
Evolutionary and biochemical analyses reveal conservation of the Brassicaceae telomerase ribonucleoprotein complex
TLDR
A phylogenetic and biochemical approach is combined to understand how the telomerase RNP has evolved in Brassicaceae, the family that includes A. thaliana, and revealed a highly expressed locus whose disruption by a T-DNA resulted in a telomeric phenotype similar to the loss of other telomersase core proteins, indicating that the RNA has an important function in telomere maintenance.
Centromere and telomere sequence alterations reflect the rapid genome evolution within the carnivorous plant genus Genlisea.
TLDR
Differences in centromeric and, surprisingly, also in telomeric DNA sequences, uncovered between groups with on average a > 9-fold genome size difference, emphasize the fast genome evolution within this genus.
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