FEBS Letters | |
On the origins of genetic variants | |
Wintersberger, Ulrike1  | |
[1]Department of Molecular Genetics, Institute for Tumorbiology and Cancer Research, University of Vienna, Borschkegasse 8a, A-1090 Wien, Austria | |
关键词: DNA replication fidelity; Fluctuation assay; Mutation; Gene conversion; Selection; Evolution; | |
DOI : 10.1016/0014-5793(91)80796-6 | |
学科分类:生物化学/生物物理 | |
来源: John Wiley & Sons Ltd. | |
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【 摘 要 】
Two contrasting mechanisms responsible for the creation of genetic variants are described: one is the manifestation of the limited accuracy of the cellular machinery for DNA replication, the other results from the ability of cells to repair damaged DNA. Replication-dependent variants and those caused by episodical DNA damage enhance the probability that a small fraction of a cell population may survive a sudden (physical or biological) change of environmental conditions. Replication-independent variants arise during persistent but not immediately lethal stress (e.g. starvation) of a non-dividing population. The variants observed under these conditions are of selective advantage because they are able to cope with the particular stress situation. The molecular basis of their creation is a matter of intensive debate.
【 授权许可】
Unknown
【 预 览 】
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RO201912020295053ZK.pdf | 680KB | ![]() |