WormMine: ExpressionPattern Expr1627

• Pattern: MUA-3 also localizes to sites where other striated muscles make adhesive contact and transmit force across the hypodermis. These include the vulval muscles, the anal depressor muscle, and the junctions between anal sphincter muscle and rectal cuticle that cross the intestinal/rectal epithelium. MUA-3 localizes to several sites where non-muscle cells make tight transhypodermal contacts to the cuticle. It is present in thin longitudinal stripes where the touch neurons (ALM and PLM) compress the hypodermis to make close contact with the cuticle, and where the sensory dendrites of the amphid, phasmid, and IL neurons penetrate the hypodermis and cuticle to form externally exposed sensilla. MUA-3 also localizes to the excretory duct and pore cells, both of which contain a cuticle lined lumen. MUA-3 localizes to several sites where nonmuscle cells make tight transhypodermal contacts to the cuticle. It is present in thin longitudinal stripes where the touch neurons (ALM and PLM) compress the hypodermis to make close contact with the cuticle, and where the sensory dendrites of the amphid, phasmid, and IL neurons penetrate the hypodermis and cuticle to form externally exposed sensilla. MUA-3 also localizes to the excretory duct and pore cells, both of which contain a cuticle lined lumen. MUA-3 was not detected at the uterine seam, where the uterus makes indirect IF mediated contact to the cuticle via the seam cells, or in the pharynx, where IF bundles link the basal lamina to the lumenal cuticle. The major site of MUA-3 localization is the hypodermis at the sites of muscle contact. The immunofluorescence coincides with the extent of the body wall muscle bands and shows a repeating pattern of closely spaced circumferential stripes (~0.4 um periodicity) separated by an unstained gap (~0.2 um) in adults. Individual stripes are not uniformly stained, but rather composed of many individual spots and frequently contain a narrow central nonstaining region. Where neuronal processes interpose between hypodermis and basal lamina, MUA-3 is absent, resulting in stereotypical gaps. The MUA-3 localization pattern is virtually identical with those reported for MH4 and p70 (IF proteins) and MH46 (myotactin). During embryogenesis, MUA-3 is observed in 2-fold and older embryos.
• Primary Identifier: Expr1627
• Remark: Probably also expressed at postembryonic stages, but actual stages was not mentioned clearly in the paper.

8 Anatomy Terms

Definition	Name	Synonym	Primary Identifier
Epidermal layer.	hypodermis	epidermis	WBbt:0005733
The passageway in the hindgut between the posterior intestine, the rectal valve and the opening to the exterior.	rectum		WBbt:0005773
a single, H-shaped cell which lies just above the anus and connects the roof of the anal canal to the dorsal bodywall; its contractions act to increase the size of the anal opening by lifting the roof of the rectum and hence facilitate expulsion of intestinal contents.	anal depressor muscle	dilator muscle	WBbt:0004292
a saddle-shaped muscle cell that encircles the intestinal-rectal valve	anal sphincter muscle	lineage name: ABprpppppap	WBbt:0005798
neuron of the amphid sensillum	amphid neuron	amphid sensory neuron	WBbt:0005394
The outlet of the excretory sinus to the exterior environment through the cuticle, on the ventral side of the head, just behind the nerve ring.	excretory pore	pore	WBbt:0005778
cell that forms the duct of the excretory system.	excretory duct cell	exc duct	WBbt:0004540
bilateral sensory organ in the tail, similar to the amphid in the head.	phasmid sensillum		WBbt:0005425

1 Genes

WormBase Gene ID	Gene Name	Sequence Name	Organism
WBGene00003482	mua-3	K08E5.3	Caenorhabditis elegans

3 Life Stages

Remark	Definition	Other Name	Public Name	Primary Identifier
	The C. elegans life stage spanning 620-800min(hatch) 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. A stage after elongation is over. The last stage of embryogenesis. Also called pre-hatched embryo, late embryo or morphogenetic embryo.		fully-elongated embryo Ce	WBls:0000021
	The C. elegans life stage spanning 460-520min 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 double fold. A stage between 1.5-fold embryo and 3-fold embryo.		2-fold embryo Ce	WBls:0000019
	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