WormMine: ExpressionPattern Expr16249

• Pattern: PTR-18 and GRL-7 are temporally localized along the periphery of the apical membranes of hypodermal and P neuronal progenitor cells during late embryogenesis and are subsequently targeted to lysosomal degradation before hatching. PTR-18::GFP was first detected along the apical side of surface cells that cover the whole body, which consists of hypodermal, seam, and P cells at the 3-fold stage during embryogenesis. During the early time point, the majority of the 3-fold embryos initially showed apical localization of PTR-18::GFP. As development continued, the percentage of the apical localization decreased, the fraction that exhibited localization of PTR-18::GFP in the vesicular punctate structures increased, and eventually, most of the embryos did not show its expression. These observations indicate that PTR-18::GFP first localizes at the apical side of the hypodermal, seam, and P cells, subsequently accumulates in the vesicular structures, and eventually disappears before hatching. PTR-18::GFP was alsoexpressed in the descendants of P cells, rectal epithelial F, K, and U cells, and some seam cells in late L1 larvae.
• Primary Identifier: Expr16249

3 Anatomy Terms

Definition	Name	Synonym	Primary Identifier
a group of hypodermal cells that lie along the apical midline of the hypodermis, at the extreme left and right sides between nose and tail	seam cell	lateral hypodermis	WBbt:0005753
primary cell type that forms the hypodermis.	hypodermal cell		WBbt:0007846
Blast cell lying ventrolaterally in the late embryo and L1 larval stage which divides during the late L1 larva in stereotypical reiterated fashion to give rise to many motor neurons which begin function in the ventral cord and preanal ganglion of the early L2 larva, as well as hypodermal cells (which fuse into hyp7) and a series of programmed cell deaths. In addition, the Pn.p daughters of P3 through P8 lineages persist without fusing into the hyp7 syncytium until mid L3 stage when they can be induced to divide further to produce vulval epithelial cells (vulA - vulF) or more hyp7 cells. P0 is also known as W.	ventral cord blast cell	P cell	WBbt:0008115

1 Genes

WormBase Gene ID	Gene Name	Sequence Name	Organism
WBGene00004232	ptr-18	Y38F1A.3	Caenorhabditis elegans

1 Life Stages

Remark	Definition	Other Name	Public Name	Primary Identifier
	The C. elegans life stage spanning 520-620min after first cleavage at 20 Centigrade. Cell number remains at ~560 cells, with some new cells generated and some cells go through programmed cell death. The shape of embryo is elongated and tripple fold. A stage between 2-fold embryo and fully-elongated embryo. Also called pretzel embryo or pretzel stage.		3-fold embryo Ce	WBls:0000020