Plexin A (PlexA) encodes a transmembrane receptor for Semaphorin ligands encoded by Sema1a and Sema1b. The intracellular region of this receptor has GTPase activating protein (GAP) activity on Ras/Rap small GTPases. The signaling by the product of PlexA alters actin, microtubules and cell adhesion in developmental processes such as axon guidance.

Semaphorin-1A; Semaphorin 1a (Sema1a) encodes a transmembrane protein belonging to the semaphorin protein family. It is a repulsive axon guidance cue, signaling through direct interactions with the receptor encoded by PlexA, and also functions as a receptor to regulate dendrite targeting and axon guidance. Secreted semaphorins encoded by Sema2a and Sema2b can act as the product of Sema1a ligands.

Protein tyrosine phosphatase 52F (Ptp52F) encodes a transmembrane receptor tyrosine phosphatase (RPTP). It genetically interacts with the other RPTP genes and its mutants have motor axon defects. It regulates Tartan signaling in embryonic SNa motor neurons.

Tyrosine-protein kinase-like otk; Acts as a calcium-dependent, homophilic cell adhesion molecule that regulates neural recognition during the development of the nervous system. Component of the repulsive Plexin signaling response to regulate motor axon guidance at the embryonic stage. Also component of a receptor complex that is required in the adult visual system to innervate the lamina layer; specific targeting of R1-R6 axons; Belongs to the protein kinase superfamily. Tyr protein kinase family. Insulin receptor subfamily.

Roundabout 3, isoform A.

Collapsin Response Mediator Protein (CRMP) encodes a protein that contributes to pyrimidine catabolism, beta-alanine biosynthesis, neurogenesis and behavior.

Semaphorin-2A; Semaphorin 2a (Sema2a) encodes a secreted member of the semaphorin protein family. It utilizes the receptor encoded by PlexB to mediate both repulsive and attractive axon guidance. It also utilizes the transmembrane semaphorin encoded by Sema1a as a receptor for dendrite process guidance.

Ras-like GTP-binding protein Rho1; Has a role in regulating actin cytoskeletal organization: required during early development for proper execution of morphogenetic movements of individual cells and groups of cells important for the formation of the embryonic body plan. Plays a role in regulating dorsal closure during embryogenesis. During axis elongation, required for Rho-kinase Rok planar polarity and adherens junction localization as well as for generating a planar polarized distribution of the actin-binding protein Shrm. During embryogenesis, acts upstream of wash to regulate the d [...]

Tyrosine-protein kinase Fer; Tyrosine-protein kinase which is required during embryogenesis for formation of the actin cable in leading edge cells of the dorsal epidermis and for the timely progression of dorsal closure. May play a role in regulation of adherens junctions and cell adhesion through phosphorylation of the beta-catenin arm.