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Common ancestry of heterodimerizing TALE homeobox transcription factors across Metazoa and Archaeplastida

Authors: Sunjoo Joo; Ming Hsiu Wang; Gary Lui; Jenny Lee; Andrew Barnas; Eunsoo Kim; Sebastian Sudek; +2 Authors

Common ancestry of heterodimerizing TALE homeobox transcription factors across Metazoa and Archaeplastida

Abstract

AbstractHomeobox transcription factors (TFs) in the TALE superclass are deeply embedded in the gene regulatory networks that orchestrate embryogenesis. Knotted-like homeobox (KNOX) TFs, homologous to animal MEIS, have been found to drive the haploid-to-diploid transition in both unicellular green algae and land plants via heterodimerization with other TALE superclass TFs, representing remarkable functional conservation of a developmental TF across lineages that diverged one billion years ago. To delineate the ancestry of TALE-TALE heterodimerization, we analyzed TALE endowment in the algal radiations of Archaeplastida, ancestral to land plants. Homeodomain phylogeny and bioinformatics analysis partitioned TALEs into two broad groups, KNOX and non-KNOX. Each group shares previously defined heterodimerization domains, plant KNOX-homology in the KNOX group and animal PBC-homology in the non-KNOX group, indicating their deep ancestry. Protein-protein interaction experiments showed that the TALEs in the two groups all participated in heterodimerization. These results indicate that the TF dyads consisting of KNOX/MEIS and PBC-containing TALEs must have evolved early in eukaryotic evolution, a likely function being to accurately execute the haploid-to-diploid transitions during sexual development.Author summaryComplex multicellularity requires elaborate developmental mechanisms, often based on the versatility of heterodimeric transcription factor (TF) interactions. Highly conserved TALE-superclass homeobox TF networks in major eukaryotic lineages suggest deep ancestry of developmental mechanisms. Our results support the hypothesis that in early eukaryotes, the TALE heterodimeric configuration provided transcription-on switches via dimerization-dependent subcellular localization, ensuring execution of the haploid-to-diploid transition only when the gamete fusion is correctly executed between appropriate partner gametes, a system that then diversified in the several lineages that engage in complex multicellular organization.

Country
Germany
Subjects by Vocabulary

Microsoft Academic Graph classification: Gene regulatory network Biology Phylogenetics Transcription factor Archaeplastida Common ancestry biology.organism_classification Multicellular organism Evolutionary biology Homeobox Function (biology) Superclass

Library of Congress Subject Headings: lcsh:QH301-705.5 lcsh:Biology (General)

Medical Subject Headings: fungi

Keywords

Physiology, PBC-homology, Plant Science, General Biochemistry, Genetics and Molecular Biology, Evolution, Molecular, Structural Biology, Animals, Phylogeny, Ecology, Evolution, Behavior and Systematics, Archaeplastida evolution, Genes, Homeobox, Computational Biology, Correction, Cell Biology, KNOX transcription factor, Plants, Developmental mechanism, TALE-class homeobox, General Agricultural and Biological Sciences, Transcription factor heterodimerization, Dimerization, Transcription Factors, Developmental Biology, Biotechnology

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  • citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    18
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 10%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
18
Top 10%
Average
Top 10%
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