Transposon-derived transcription factors across metazoans

Author:

Mukherjee Krishanu,Moroz Leonid L.ORCID

Abstract

ABSTRACTTransposable elements (TE) could serve as sources of new transcription factors (TFs) in plants and some other model species, but such evidence is lacking for most animal lineages. Here, we discovered multiple independent co-options of TEs to generate 788 TFs across Metazoa, including all early-branching animal lineages. Six out of ten super-families of known TEs (ZBED, CENPB, FHY3, HTH-Psq, THAP, and FLYWCH) were recruited as representatives of nine phyla. The most extensive convergent domestication of TE-derived TFs occurred in the hydroid polyps, polychaete worms, cephalopods, oysters, and sea slugs. Phylogenetic reconstructions showed species-specific clustering and lineage-specific expansion; none of the identified TE-derived TFs revealed homologs in their closest neighbors. Together, our study established a framework for categorizing TE-derived TFs and informing the origins of novel genes across phyla.

Publisher

Cold Spring Harbor Laboratory

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