Recurrent evolution of vertebrate transcription factors by transposase capture.

Recurrent evolution of vertebrate transcription factors by transposase capture.
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DOI:
10.1126/science.abc6405
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发表时间:
2021-02-19
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Feschotte C
Feschotte C
中科院分区:
其他
文献类型:
--
作者:
Cosby RL;Judd J;Zhang R;Zhong A;Garry N;Pritham EJ;Feschotte C

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Genes with novel cellular functions may evolve through exon shuffling which can assemble unique protein architectures. Here we show that DNA transposons provide a recurrent supply of materials to assemble protein-coding genes via exon-shuffling. We find that transposase domains have been captured, primarily via alternative splicing, to form fusion proteins at least 94 times independently over ~350 million years of tetrapod evolution. We find an excess of transposase DNA-binding domains fused to host regulatory domains, especially the Krüppel-associated Box (KRAB), and identify four independently evolved KRAB-transposase fusion proteins repressing gene expression in a sequence-specific fashion. The bat-specific KRABINER fusion protein binds its cognate transposons genome-wide and controls a network of genes and cis-regulatory elements. These results illustrate how a transcription factor and its binding sites can emerge. Host-transposase domain fusion generates novel cellular genes, including deeply conserved and lineage specific transcription factors.
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