Notably, it has been observed that unrelated A-T rich repeat units serve as autonomously replicating sequences in the mitochondrial DNA of Paramecium and Tetrahymena; these units are located at one end of the mitochondrial chromosome, close to the telomeric repeats [ 14- 16].
The replicated sequences matched those obtained in the Florence laboratory (see Table S2, see Additional file 2).
Eukaryotic DNA replication is initiated from multiple origins that are defined as autonomously replicating sequences (ARSs) in budding yeast.
In this study we have isolated and characterized autonomously replicating sequences (ARSs) in Lachancea kluyveri - a pre-whole genome duplication (WGD) budding yeast.
A recent functional assay based on plasmid maintenance identified a set of 84 autonomously replicating sequences (ARS) in the genome of L. kluyveri (Liachko et al. 2011).
To elucidate the role of the chromatin environment in the regulation of replication origin activation, autonomously replicating sequences were inserted into identical locations in the budding yeast genome and their activation times in S phase determined.
Since then, genome-wide catalogs of autonomously replicating sequences (ARS) have been established in S. cerevisiae [ 3, 4], Lachancea kluyveri [ 5], Lachancea waltii [ 6], Kluyveromyces lactis [ 7], Candida albicans [ 8], and Pichia pastoris [ 9].
We found that for the earliest replicating sequences in normal human fibroblasts, there is a positive correlation with open chromatin, gene and exon density, and active promoters.
The autonomous maintenance in A spergillus (AMA1) sequence, isolated from a genomic library of Aspergillus nidulans, is based on two inverted sequences surrounding a unique central core sequence and displays properties similar to the autonomous replicating sequences in S. cerevisiae (Gems et al. 1991; Verdoes et al. 1994; Aleksenko and Clutterbuck 1996, 1997; Khalaj et al. 2007).
The organization of these forms and the identification of an autonomously replicating sequence functional in S. cerevisiae, strongly suggest that an extrachromosomal circular DNA (eccDNA) molecule serves as an intermediate in the amplification of the Z. bailii region in yeast genomes.
The complex binds to the origin sequence called autonomously replicating sequence (ARS) in chromosomes of budding yeast.
