WormMine: ExpressionPattern Expr2857

• Pattern: IFB-1ADGFP was first detected in epidermal cells at the enclosure stage of embryogenesis. By the 1.5-fold stage, IFB-1ADGFP began to accumulate in regions of epidermal cells adjacent to body wall muscles. In addition to epidermal and pharyngeal expression, both IFB-1 isoforms were expressed in other cell types. Both isoforms were localized to the processes of the excretory cell and the excretory duct. IFB-1B, but not IFB-1A, transgenes were highly expressed in the uterine epithelium. Prominent expression of IFB-1 isoforms was also observed in the pharynx. Both IFB-1A and IFB-1B are expressed in marginal cells of the pharynx. IFB-1BDGFP transgenes were expressed throughout the length of the pharynx, whereas IFB-1ADGFP transgenes were expressed in a subset of pharyngeal marginal cells. In pharyngeal marginal and muscle cells, Myotactin is localized basally, whereas IFB-1ADGFP and IFB-1BDGFP were distributed throughout the apicalbasal axis. These data confirm previous reports of anti-IFB-1 staining in pharyngeal marginal cells.
• Primary Identifier: Expr2857
• Reporter Gene: IFB-1BDGFP data were collected using the pCZ482 extrachromosomal array juEx595.
• Subcellular Localization: In embryos after the 2-fold stage, larvae, and adults, IFB-1ADGFP localized to circumferential stripes in the parts of the epidermis that contact body wall muscles and in double tracks corresponding to epidermis overlying the processes of mechanosensory neurons; these patterns of subcellular localization correspond to epidermal attachment structures, also known as fibrous organelles. IFB-1BDGFP was also expressed in the epidermis in a pattern indistinguishable from that of IFB-1A. Thus, both isoforms of IFB-1 are expressed in the epidermis and localized to the same subcellular compartments. The monoclonal antibody MH4 recognizes an epitope common to IFA-1, IFA-2, and IFA-3, and does not recognize IFB-1. MH4 staining and IFB-1ADGFP expression co-localized in both embryonic and adult epidermal cells. In the adult epidermis, IFB-1ADGFP partly co-localized with Myotactin, a transmembrane protein that localizes to or close to the basal parts of epidermal attachments.

4 Anatomy Terms

Definition	Name	Synonym	Primary Identifier
type of cells that make up muscle layers in the pharynx.	pharyngeal muscle cell		WBbt:0005451
H-shaped cell associated with the excretory system, largest cell in C. elegans.	excretory cell	excretory canal cell	WBbt:0005812
a type of pharyngeal cell that connects basement membrane to the apices of triangle-shaped pharyngeal lumen.	marginal cell		WBbt:0003673
toroidal epithelial cell that make up the bulk of the uterus, four cells anterior and four cells posterior to the vulva.	uterine toroidal epithelial cell	ut cell	WBbt:0006784

1 Genes

WormBase Gene ID	Gene Name	Sequence Name	Organism
WBGene00002053	ifb-1	F10C1.2	Caenorhabditis elegans

8 Life Stages

Remark	Definition	Other Name	Public Name	Primary Identifier
	The second stage larva. At 25 Centigrade, it ranges 25.5-32.5 hours after fertilization, 11.5-18.5 hours after hatch.		L2 larva Ce	WBls:0000027
	The fourth stage larva. At 25 Centigrade, it ranges 40-49.5 hours after fertilization, 26-35.5 hours after hatch.		L4 larva Ce	WBls:0000038
	The first stage larva. At 25 Centigrade, it ranges 14-25.5 hours after fertilization, 0-11.5 hours after hatch.		L1 larva Ce	WBls:0000024
	The stage that begins when a C.elegans individual is fully-developed and has reached maturity.		adult Ce	WBls:0000041
	The third stage larva. At 25 Centigrade, it ranges 32.5-40 hours after fertilization, 18.5-26 hours after hatch.		L3 larva Ce	WBls:0000035
	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 350-620min 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 stage that embryo starts elongation until elongation is over.		elongating embryo Ce	WBls:0000015
	The C. elegans life stage spanning 290-350min after first cleavage at 20 Centigrade. Proliferate from 421 cells to 560 cells. The stage when embryo just finished gastrulation and is enclosing.		enclosing embryo Ce	WBls:0000013