WormBase Tree Display for Expr_pattern: Expr2546

Expr2546 Expression_of: Gene: WBGene00002125
    Reflects_endogenous_expression_of: WBGene00002125
  Expression_data: Life_stage: WBls:0000024
      WBls:0000003
      WBls:0000038
      WBls:0000027
      WBls:0000035
      WBls:0000041
    Anatomy_term (67)
    GO_term: GO:0005737
      GO:0005921
  Subcellular_localization: At embryonic 2-cell stage, localized to small plaques at cellcell interfaces.
    At the late first larval (L1) stage, INX-3 is present transiently in some newly generated cells, and in cells of the first two divisions of the M blast cell, coelomocytes, and sex muscles. INX-3 is readily detectable in the cytoplasm of these cells, as well as in cell-surface plaques.
    By the comma stage, INX-3 is localized principally in puncta at plasma membranes. At comma stage, within intestinal cells, whose large size allows easy visualization of subcellular location, INX-3 is localized to the basal portion of lateral membranes.
  Type: Antibody: Rabbit polyclonal anti-INX-3 antibodies were generated in rabbits against purified MBP (maltose-binding protein)::INX-3 fusion protein that included the C-terminal 87 amino acids of INX-3. Anti-INX-3 antibodies were affinity purified by binding to GST that included the same C-terminal 87 amino acids of INX-3. Affinity-purified anti-INX-3 antibodies were used to examine the pattern of expression and localization of INX-3 during development.
  Pattern: At the late first larval (L1) stage, INX-3 is present transiently in some newly generated cells. The postembryonic motor neurons, descendants of the Pn.a cells, express INX-3 briefly. INX-3 is also detected briefly in cells of the first two divisions of the M blast cell, coelomocytes, and sex muscles.
    By the comma stage, corresponding to early embryonic morphogenesis, INX-3 is still broadly expressed, but the pattern of expression becomes more restricted as morphogenesis proceeds. Because INX-3 is localized principally in puncta at plasma membranes, it is hard to assign expression unambiguously to individual cells; however, expression in major cell types or organs is clear. Double-labeling embryos with anti-INX-3 and MH27, a mAb that binds AJM-1 in apical epithelial intercellular junctions, indicated that, at the comma stage, INX-3 is localized to the developing intestine, pharynx, and hypodermis (epidermis), at minimum.
    During late morphogenesis, from the 3-fold stage until hatching, INX-3 is found principally in the posterior pharynx (isthmus and terminal bulb), at the anteriormost tip of the pharynx, in the region of the posterior intestine (probably intestinal muscles or rectal cells) and in the hypodermis. Expression in these tissues continues throughout development into adulthood with the exception of the hypodermis. Hypodermal expression is strong at the time of hatching, and INX-3 is present in plaques at the intercellular boundaries between most hypodermal cells except at the ventral midline between paired P cells; however, INX-3 becomes undetectable in the hypodermis shortly after hatching.
    INX-3 protein is first detected at the embryonic 2-cell stage. It is localized to small plaques at cellcell interfaces and can be detected throughout early embryogenesis in a pattern suggesting that most or all cells express inx-3.
    In adults, INX-3 is reduced such that only a few plaques are associated with vulval muscles.
    In the late L3 stage, INX-3 expression begins in the sex myoblasts (SMs). Expression continues in SM descendants so that all 16 sex muscles stain with anti-INX-3 in early L4 animals, confirming results obtained with an inx-3::gfp translational fusion gene.
  Remark: INX-3 detected during very early stages of development is likely to be maternally derived, since INX-3::GFP expressed zygotically is first detected by anti-GFP antibodies at approximately the 28-cell stage.
  Reference: WBPaper00005835
  Antibody_info: WBAntibody00000617