Innovation of heterochromatin functions drives rapid evolution of essential ZAD-ZNF genes in Drosophila.
Innovation of heterochromatin functions drives rapid evolution of essential ZAD-ZNF genes in Drosophila.
复制标题
异染色质功能的创新驱动果蝇中必不可少的ZAD-ZNF基因的快速演变。
DOI:
10.7554/elife.63368
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发表时间:
2020-11-10
期刊:
影响因子:
7.7
通讯作者:
Malik HS
中科院分区:
文献类型:
--
作者:
Kasinathan B;Colmenares SU 3rd;McConnell H;Young JM;Karpen GH;Malik HS
Contrary to dogma, evolutionarily young and dynamic genes can encode essential functions. We find that evolutionarily dynamic ZAD-ZNF genes, which encode the most abundant class of insect transcription factors, are more likely to encode essential functions in Drosophila melanogaster than ancient, conserved ZAD-ZNF genes. We focus on the Nicknack ZAD-ZNF gene, which is evolutionarily young, poorly retained in Drosophila species, and evolves under strong positive selection. Yet we find that it is necessary for larval development in D. melanogaster. We show that Nicknack encodes a heterochromatin-localizing protein like its paralog Oddjob, also an evolutionarily dynamic yet essential ZAD-ZNF gene. We find that the divergent D. simulans Nicknack protein can still localize to D. melanogaster heterochromatin and rescue viability of female but not male Nicknack-null D. melanogaster. Our findings suggest that innovation for rapidly changing heterochromatin functions might generally explain the essentiality of many evolutionarily dynamic ZAD-ZNF genes in insects.
DOI:
10.1534/g3.117.300289
发表时间:
2018-01-04
期刊:
G3 (Bethesda, Md.)
影响因子:
--
作者:
Kahsai L;Cook KR
通讯作者:
Cook KR