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Regulation of UNC-130/FOXD-mediated mesodermal patterning in C. elegans.

ABSTRACT: Spatial polarity cues in animals are used repeatedly during development for many processes, including cell fate determination, cell migration, and axon guidance. In Caenorhabditis elegans, the body wall muscle extends the length of the animal in four distinct quadrants and generates an UNC-129/TGF-?-related signal that is much higher in the dorsal two muscle quadrants compared to their ventral counterparts. This pattern of unc-129 expression requires the activity of the proposed transcriptional repressor UNC-130/FOXD whose body wall muscle activity is restricted to the ventral two body wall muscle quadrants. To understand how these dorsal-ventral differences in UNC-130 activity are established and maintained, we have analyzed the regulation of unc-130 expression and the distribution of UNC-130 protein. We have identified widespread, cis-acting elements in the unc-130 promoter that function to positively regulate ventral body wall muscle expression and negatively regulate dorsal body wall muscle expression. We have defined the temporal distribution of UNC-130 protein in body wall muscle cells during embryogenesis, demonstrated that this pattern is required to establish the dorsal-ventral polarity of UNC-129/TGF-?, and shown that UNC-130 is not required post-embryonically to maintain the asymmetry of body wall muscle unc-129 expression. Finally, we have tested the impact of the depletion of a variety of transcription factors, repressors, and signaling molecules to identify additional regulators of body wall muscle UNC-130 polarity. Our results confirm and extend earlier studies to clarify the mechanisms by which UNC-130 is controlled and affects the pattern of unc-129 expression in body wall muscle. These results further our understanding of the transcriptional logic behind the generation of polarity cues involving this poorly understood subclass of Forkhead factors.

SUBMITTER: Kersey RK

PROVIDER: S-EPMC4983225 | biostudies-literature | 2016 Aug

REPOSITORIES: biostudies-literature

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Regulation of UNC-130/FOXD-mediated mesodermal patterning in C. elegans.

Kersey Rossio K RK Brodigan Thomas M TM Fukushige Tetsunari T Krause Michael W MW

Developmental biology 20160621 2

Spatial polarity cues in animals are used repeatedly during development for many processes, including cell fate determination, cell migration, and axon guidance. In Caenorhabditis elegans, the body wall muscle extends the length of the animal in four distinct quadrants and generates an UNC-129/TGF-β-related signal that is much higher in the dorsal two muscle quadrants compared to their ventral counterparts. This pattern of unc-129 expression requires the activity of the proposed transcriptional ...[more]

PMID: 27341757

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Project description:modENCODE_submission_2430 This submission comes from a modENCODE project of Michael Snyder. For full list of modENCODE projects, see http://www.genome.gov/26524648 Project Goal: We are identifying the DNA binding sites for 300 transcription factors in C. elegans. Each transcription factor gene is tagged with the same GFP fusion protein, permitting validation of the gene's correct spatio-temporal expression pattern in transgenic animals. Chromatin immunoprecipitation on each strain is peformed using an anti-GFP antibody, and any bound DNA is deep-sequenced using Solexa GA2 technology. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf EXPERIMENT TYPE: CHIP-seq. BIOLOGICAL SOURCE: Strain: OP77(made_by : R. Waterston description : This strain's transgene was constructed by Mihail Sarov at the Max Planck Institute for Cell Biology in Tubiginen using Tony Hyman's recombineering pipeline. The resulting plasmid was used for biolistic transformation of an unc-119(ed3) strain. The UNC-130::EGFP fusion protein is expressed in the correct unc-130 spatio-temporal expression pattern. This strain was used for ChIP-seq experiments to map the in vivo binding sites for the UNC-130 transcription factor. tags : GFP::3xFlag mutagen : Bombard outcross : 3 genotype : unc-119(ed3) III; wgIs77 [unc-119(+) unc-130::TY1::EGFP::3xFLAG] official name : OP77 ); Developmental Stage: fed L1; Genotype: unc-119(ed3) III; wgIs77 [unc-119(+) unc-130::TY1::EGFP::3xFLAG]; Sex: Hermaphrodite; EXPERIMENTAL FACTORS: Developmental Stage fed L1; Target gene unc-130; Strain OP77(made_by : R. Waterston description : This strain's transgene was constructed by Mihail Sarov at the Max Planck Institute for Cell Biology in Tubiginen using Tony Hyman's recombineering pipeline. The resulting plasmid was used for biolistic transformation of an unc-119(ed3) strain. The UNC-130::EGFP fusion protein is expressed in the correct unc-130 spatio-temporal expression pattern. This strain was used for ChIP-seq experiments to map the in vivo binding sites for the UNC-130 transcription factor. tags : GFP::3xFlag mutagen : Bombard outcross : 3 genotype : unc-119(ed3) III; wgIs77 [unc-119(+) unc-130::TY1::EGFP::3xFLAG] official name : OP77 ); temp (temperature) 20 degree celsius Series_type: CHIP-seq

Dataset Information

Regulation of UNC-130/FOXD-mediated mesodermal patterning in C. elegans.

Publications

Regulation of UNC-130/FOXD-mediated mesodermal patterning in C. elegans.

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