Alternative Lengthening of Telomeres in Yeast: Old Questions and New Approaches.
Alternative Lengthening of Telomeres in Yeast: Old Questions and New Approaches.
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DOI:
10.3390/biom14010113
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发表时间:
2024-01-16
期刊:
影响因子:
5.5
通讯作者:
中科院分区:
文献类型:
--
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Alternative lengthening of telomeres (ALT) is a homologous recombination-based pathway utilized by 10–15% of cancer cells that allows cells to maintain their telomeres in the absence of telomerase. This pathway was originally discovered in the yeast Saccharomyces cerevisiae and, for decades, yeast has served as a robust model to study ALT. Using yeast as a model, two types of ALT (RAD51-dependent and RAD51-independent) have been described. Studies in yeast have provided the phenotypic characterization of ALT survivors, descriptions of the proteins involved, and implicated break-induced replication (BIR) as the mechanism responsible for ALT. Nevertheless, many questions have remained, and answering them has required the development of new quantitative methods. In this review we discuss the historic aspects of the ALT investigation in yeast as well as new approaches to investigating ALT, including ultra-long sequencing, computational modeling, and the use of population genetics. We discuss how employing new methods contributes to our current understanding of the ALT mechanism and how they may expand our understanding of ALT in the future.
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