Probable sodium/potassium/calcium exchanger CG1090; May function in the removal and maintenance of calcium homeostasis. Transports one Ca(2+) and 1 K(+) in exchange for 4 Na(+) (By similarity).

Peripheral plasma membrane protein CASK; CASK (CASK) encodes a member of the MAGUK family of scaffolding proteins. In epithelial tissues, the product of CASK functions as an adhesion molecule involved in cell proliferation, cytoskeletal remodeling and cell migration. In neurons, the product of CASK serves as a scaffold for a number of signaling and transmembrane molecules and is involved in synaptic development and plasticity.

Gliotactin, isoform A; Gliotactin (Gli) encodes a transmembrane protein localized at tricellular junctions that is necessary for septate junction and permeability barrier formation.

Beta Spectrin (beta-Spec) encodes an essential protein that interacts with the product of alpha-Spec to form a heterotetramer. The product of beta-Spec is typically associated with the plasma membrane. It functions in a lipoprotein pathway that delivers dietary fat to the larval fat body for storage. It is also believed to function in asymmetric division of germ line stem cells via cytoplasmic structures called spectrosomes and fusomes.

Kune-kune; It is involved in the biological process described with: establishment of glial blood-brain barrier; regulation of tube length, open tracheal system; septate junction assembly.

Neurexin 1, isoform F; Neurexin 1 (Nrx-1) encodes a transmembrane synaptic adhesive molecule that regulates the synaptic architecture and function in the brain and neuromuscular junction. It contributes to synaptic growth, transmission, synaptic formation and also regulation of learning and memory, locomotion and visual function.

Glutamate receptor IIA (GluRIIA) encodes a subunit of the muscle glutamate receptor that responds to neurotransmitter at the neuromuscular junction.

Neuroglian; The long isoform may play a role in neural and glial cell adhesion in the developing embryo. The short isoform may be a more general cell adhesion molecule involved in other tissues and imaginal disk morphogenesis. Vital for embryonic development. Essential for septate junctions. Septate junctions, which are the equivalent of vertebrates tight junctions, are characterized by regular arrays of transverse structures that span the intermembrane space and form a physical barrier to diffusion. Required for the blood-brain barrier formation.

Yurt, isoform A; Yurt (yrt) encodes a membrane-associated protein. It contributes to apical-basal polarity and permeability of septate junctions. In differentiating epithelial cells, it counteracts apical polarity proteins to sustain lateral membrane stability and apical-basal polarity. In fully differentiated cells, the product of yrt acts as a negative regulatory component of the crb complex and limits apical membrane growth.