Copy Number of the Transposon, Pokey, in rDNA Is Positively Correlated with rDNA Copy Number in Daphnia obtusa

Copy Number of the Transposon, Pokey, in rDNA Is Positively Correlated with rDNA Copy Number in Daphnia obtusa

Pokey is a class II DNA transposon that inserts into 28S ribosomal RNA (rRNA) genes and other genomic regions of species in the subgenus, Daphnia. Two divergent lineages, PokeyA and PokeyB have been identified. Recombination between misaligned rRNA genes changes their number and the number of Pokey elements. We used quantitative PCR (qPCR) to estimate rRNA gene and Pokey number in isolates from...

Correction: Copy Number of the Transposon, Pokey, in rDNA Is Positively Correlated with rDNA Copy Number in Daphnia obtusa

[This corrects the article DOI: 10.1371/journal.pone.0114773.].

Trf4 targets ncRNAs from telomeric and rDNA spacer regions and functions in rDNA copy number control

Trf4 is the poly(A) polymerase component of TRAMP4, which stimulates nuclear RNA degradation by the exosome. We report that in Saccharomyces cerevisiae strains lacking Trf4, cryptic transcripts are detected from regions of repressed chromatin at telomeres and the rDNA intergenic spacer region (IGS1-R), and at CEN3. Degradation of the IGS1-R transcript was reduced in strains lacking TRAMP compon...

Explorer Trf 4 targets ncRNAs from telomeric and rDNA spacer regions and functions in rDNA copy number control

Intercellular centrosome number is correlated with the copy number of chromosomes in bladder cancer.

Centrosome amplification, which may accelerate tumor progression through chromosomal instability, is frequently observed in human malignancies. The intercellular relation between the number of centrosomes and chromosomes, however, is poorly understood. Therefore, the relationship between centrosomes and chromosomal copy number in the same cells was investigated in bladder cancer. Centrosomes we...