Segmental border is defined by Ripply2-mediated Tbx6 repression independent of Mesp2
نویسندگان
چکیده
منابع مشابه
Tbx6-mediated Notch signaling controls somite-specific Mesp2 expression.
Mesp2 is a transcription factor that plays fundamental roles in somitogenesis, and its expression is strictly restricted to the anterior presomitic mesoderm just before segment border formation. The transcriptional on-off cycle is linked to the segmentation clock. In our current study, we show that a T-box transcription factor, Tbx6, is essential for Mesp2 expression. Tbx6 directly binds to the...
متن کاملThe negative regulation of Mesp2 by mouse Ripply2 is required to establish the rostro-caudal patterning within a somite.
The Mesp2 transcription factor plays essential roles in segmental border formation and in the establishment of rostro-caudal patterning within a somite. A possible Mesp2 target gene, Ripply2, was identified by microarray as being downregulated in the Mesp2-null mouse. Ripply2 encodes a putative transcriptional co-repressor containing a WRPW motif. We find that Mesp2 binds to the Ripply2 gene en...
متن کاملMesp2 and Tbx6 cooperatively create periodic patterns coupled with the clock machinery during mouse somitogenesis.
The metameric structures in vertebrates are based on the periodicity of the somites that are formed one by one from the anterior end of the presomitic mesoderm (PSM). The timing and spacing of somitogenesis are regulated by the segmentation clock, which is characterized by the oscillation of several signaling pathways in mice. The temporal information needs to be translated into a spatial patte...
متن کاملCompound heterozygous mutations in RIPPLY2 associated with vertebral segmentation defects.
Segmentation defects of the vertebrae (SDV) are caused by aberrant somite formation during embryogenesis and result in irregular formation of the vertebrae and ribs. The Notch signal transduction pathway plays a critical role in somite formation and patterning in model vertebrates. In humans, mutations in several genes involved in the Notch pathway are associated with SDV, with both autosomal r...
متن کاملTbx Protein Level Critical for Clock-Mediated Somite Positioning Is Regulated through Interaction between Tbx and Ripply
Somitogenesis in vertebrates is a complex and dynamic process involving many sequences of events generated from the segmentation clock. Previous studies with mouse embryos revealed that the presumptive somite boundary is periodically created at the anterior border of the expression domain of Tbx6 protein. Ripply1 and Ripply2 are required for the determination of the Tbx6 protein border, but the...
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ژورنال
عنوان ژورنال: Developmental Biology
سال: 2015
ISSN: 0012-1606
DOI: 10.1016/j.ydbio.2015.01.020