TY - JOUR
T1 - Amniotes co-opt intrinsic genetic instability to protect germ-line genome integrity
AU - Sun, Yu H.
AU - Cui, Hongxiao
AU - Song, Chi
AU - Shen, Jiafei Teng
AU - Zhuo, Xiaoyu
AU - Wang, Ruoqiao Huiyi
AU - Yu, Xiaohui
AU - Ndamba, Rudo
AU - Mu, Qian
AU - Gu, Hanwen
AU - Wang, Duolin
AU - Murthy, Gayathri Guru
AU - Li, Pidong
AU - Liang, Fan
AU - Liu, Lei
AU - Tao, Qing
AU - Wang, Ying
AU - Orlowski, Sara
AU - Xu, Qi
AU - Zhou, Huaijun
AU - Jagne, Jarra
AU - Gokcumen, Omer
AU - Anthony, Nick
AU - Zhao, Xin
AU - Li, Xin Zhiguo
N1 - Publisher Copyright:
© 2023, The Author(s).
PY - 2023/12
Y1 - 2023/12
N2 - Unlike PIWI-interacting RNA (piRNA) in other species that mostly target transposable elements (TEs), >80% of piRNAs in adult mammalian testes lack obvious targets. However, mammalian piRNA sequences and piRNA-producing loci evolve more rapidly than the rest of the genome for unknown reasons. Here, through comparative studies of chickens, ducks, mice, and humans, as well as long-read nanopore sequencing on diverse chicken breeds, we find that piRNA loci across amniotes experience: (1) a high local mutation rate of structural variations (SVs, mutations ≥ 50 bp in size); (2) positive selection to suppress young and actively mobilizing TEs commencing at the pachytene stage of meiosis during germ cell development; and (3) negative selection to purge deleterious SV hotspots. Our results indicate that genetic instability at pachytene piRNA loci, while producing certain pathogenic SVs, also protects genome integrity against TE mobilization by driving the formation of rapid-evolving piRNA sequences.
AB - Unlike PIWI-interacting RNA (piRNA) in other species that mostly target transposable elements (TEs), >80% of piRNAs in adult mammalian testes lack obvious targets. However, mammalian piRNA sequences and piRNA-producing loci evolve more rapidly than the rest of the genome for unknown reasons. Here, through comparative studies of chickens, ducks, mice, and humans, as well as long-read nanopore sequencing on diverse chicken breeds, we find that piRNA loci across amniotes experience: (1) a high local mutation rate of structural variations (SVs, mutations ≥ 50 bp in size); (2) positive selection to suppress young and actively mobilizing TEs commencing at the pachytene stage of meiosis during germ cell development; and (3) negative selection to purge deleterious SV hotspots. Our results indicate that genetic instability at pachytene piRNA loci, while producing certain pathogenic SVs, also protects genome integrity against TE mobilization by driving the formation of rapid-evolving piRNA sequences.
UR - http://www.scopus.com/inward/record.url?scp=85147975833&partnerID=8YFLogxK
U2 - 10.1038/s41467-023-36354-x
DO - 10.1038/s41467-023-36354-x
M3 - Article
C2 - 36781861
AN - SCOPUS:85147975833
SN - 2041-1723
VL - 14
JO - Nature communications
JF - Nature communications
IS - 1
M1 - 812
ER -