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MEX-3 is a KH domain protein that regulates blastomere identity in early C. elegans embryos

Article Abstract:

The anterior blastomere of C. elegans produces muscles and hypodermal cells during embryogenesis due to mutations in the mex-3 gene. The mex-3 gene alters AB activity during embryogenesis by encoding a probable ribonucleic acid(RNA)-binding protein which affects the expression of RNAs in the embryo. However, the mutagenic activity of mex-3 is not similar to the actions of met-1 and, therefore, indicating that mex-3 mutation does not involve the misexpression of SKN-1 in AB blastomere.

Physiological aspects, Nematoda, Nematodes, Myogenesis

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Wnt signaling polarizes an early C. elegans blastomere to distinguish endoderm from mesoderm

Article Abstract:

EMS is a Caenorhabditis elegans four-cell stage blastomere that produces a polarizing signal that promotes endoderm production. A study on the genes mom-1 through mom-5 revealed that 16 mutations are needed for EMS to generate endoderm. Results also reveal that mom-1, mom-2 and mom-3 are vital to the P2 signaling cell and mom-4 is is needed in EMS. Furthermore, blastomere cytoskeletal polarity was found to be affected by Wnt signaling during the early stages of the embryo.

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Wnt pathway components orient a mitotic spindle in the early Caenorhabditis elegans embryo without requiring gene transcription in the responding cell

Article Abstract:

Wnt pathway components in the early Caenorhabditis elegans embryo are discussed. These components orient a mitotic spindle without requiring gene transcription in the responding cell. A C. elegans GSK-3 beta gene that may act as a branchpoint for endoderm specification and spindle orientation has been identified and a subset of the C. elegans Wnt pathway genes necessary for endoderm specification are necessary for proper orientation of the EMS, blastomere, spindle

United States, Statistical Data Included, Genetic regulation, Embryology, Experimental, Embryological research, Mitosis, Cytoskeleton, Mesoderm

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