Sequence Transpositions Restore Genes on the Highly Degenerated W Chromosomes of Songbirds.
Sequence Transpositions Restore Genes on the Highly Degenerated W Chromosomes of Songbirds.
复制标题
序列转座恢复鸣禽高度退化的 W 染色体上的基因
DOI:
10.3390/genes11111267
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发表时间:
2020-10-28
期刊:
影响因子:
3.5
通讯作者:
Zhou Q
中科院分区:
文献类型:
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作者:
Xu L;Irestedt M;Zhou Q
The female-specific W chromosomes of most Neognathae birds are highly degenerated and gene-poor. Previous studies have demonstrated that the gene repertoires of the Neognathae bird W chromosomes, despite being in small numbers, are conserved across bird species, likely due to purifying selection maintaining the regulatory and dosage-sensitive genes. Here we report the discovery of DNA-based sequence duplications from the Z to the W chromosome in birds-of-paradise (Paradisaeidae, Passeriformes), through sequence transposition. The original transposition involved nine genes, but only two of them (ANXA1 and ALDH1A1) survived on the W chromosomes. Both ANXA1 and ALDH1A1 are predicted to be dosage-sensitive, and the expression of ANXA1 is restricted to ovaries in all the investigated birds. These analyses suggest the newly transposed gene onto the W chromosomes can be favored for their role in restoring dosage imbalance or through female-specific selection. After examining seven additional songbird genomes, we further identified five other transposed genes on the W chromosomes of Darwin’s finches and one in the great tit, expanding the observation of the Z-to-W transpositions to a larger range of bird species, but not all transposed genes exhibit dosage-sensitivity or ovary-biased expression We demonstrate a new mechanism by which the highly degenerated W chromosomes of songbirds can acquire genes from the homologous Z chromosomes, but further functional investigations are needed to validate the evolutionary forces underlying the transpositions.
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影响因子:
2.6
作者:
Davis, Jamie K.;Thomas, Pamela J.;Thomas, James W.
通讯作者:
Thomas, James W.
DOI:
10.1073/pnas.2001749117
发表时间:
2020-10-20
影响因子:
11.1
作者:
Cechova M;Vegesna R;Tomaszkiewicz M;Harris RS;Chen D;Rangavittal S;Medvedev P;Makova KD
通讯作者:
Makova KD
影响因子:
64.8
作者:
通讯作者:
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DOI:
10.1016/j.tig.2018.06.003
发表时间:
2018-09
期刊:
Trends in genetics : TIG
影响因子:
--
作者:
Larson EL;Kopania EEK;Good JM
通讯作者:
Good JM
影响因子:
30.8
作者:
通讯作者:
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