Slit3 is a member of the slit family of large secreted axon guidance molecules that are ligands for Robo receptors (1). Like other mammalian family members, the 1523 amino acid (aa) Slit3 contains a signal sequence followed by 23 leucine-rich repeats (LRR) and nine EGF-like sequences (1). Mammalian Slits also contain a laminin-G domain between EGF6 and EGF7, and a C-terminal cysteine-rich domain (1). In Drosophila Slit, specific LRR are sites of ROBO interaction and homodimerization (2). Drosophila Slit shows equal similarities with all three mouse slit proteins, which are 59‑66% identical with each other (1). During development, Slit3 is expressed in the ventral neural tube, developing sensory organs, limb buds and developing areas of the limbs in patterns that overlap with but are discrete from Slit1 and Slit2 (1). Axons will not be allowed to recross the floor plate unless all three Slit genes are disrupted, suggesting some overlap in function (3). Slit3 is also expressed in the lung, kidney, skeletal muscle and heart, both during development and postnatally (1, 4‑6). ROBO2 is often found in complementary areas (4). Mice with genetically disrupted Slit3 have thin diaphragms with disorganized collagen fibrils and frequently develop diaphragmatic hernias (5, 6). Abnormalities in kidney development may also occur (5). Although Slit proteins are generally considered to be secreted, significant amounts of Slit3 may be retained in the mitochondria because of features in the signal sequence that indicate a high probability of mitochondrial targeting (7). Secreted Slit is often membrane-associated (7). Mouse Slit3 shows 98% and 94% amino acid identity with rat and human Slit3, respectively.

References

Yuan, W. et al. (1999) Dev. Biol. 212:290.
Howitt, J. A. et al. (2004) EMBO J. 23:4406.
Long, H. et al. (2004) Neuron 42:213.
Greenberg, J. M. et al. (2004) Dev. Dyn. 230:350.
Liu, J. et al. (2003) Mech. Dev. 120:1059.
Yuan, W. et al. (2003) Proc. Natl. Acad. Sci. USA 100:5217.
Little, M. H. et al. (2001) Am. J. Physiol. Cell Physiol. 281:C486.

Long Name

SLIT Homolog 3

Alternate Names

MEGF5, SLIL2

Entrez Gene IDs

6586 (Human); 20564 (Mouse); 83467 (Rat)

Gene Symbol

SLIT3

UniProt

Q9WVB4

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This product is provided under an intellectual property license from Life Technologies Corporation. The transfer of this product is conditioned on the buyer using the purchased product solely in research conducted by the buyer, excluding contract research or any fee for service research, and the buyer must not (1) use this product or its components for (a) diagnostic, therapeutic or prophylactic purposes; (b) testing, analysis or screening services, or information in return for compensation on a per-test basis; or (c) manufacturing or quality assurance or quality control, and/or (2) sell or transfer this product or its components for resale, whether or not resold for use in research. For information on purchasing a license to this product for purposes other than as described above, contact Life Technologies Corporation, 5781 Van Allen Way, Carlsbad, CA 92008 USA or outlicensing@thermofisher.com.

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Human/Mouse/Rat Slit3 Alexa Fluor™ Plus 488-conjugated Antibody

R&D Systems, part of Bio-Techne | Catalog # AF3629AFP488

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Neutralization

Background: Slit3