IGSF9, also known as Dasm1, is an approximately 130 kDa transmembrane protein that plays a role in neuronal synapse maintenance and function (1). Mature mouse Dasm1 consists of a 714 amino acid (aa) extracellular domain (ECD) with 5 Ig-like domains and 2 fibronectin type-3 domains, a 21 aa transmembrane segment, and a 424 aa cytoplasmic domain (2). Within the ECD, mouse Dasm1 shares 90% and 96% aa sequence identity with human and rat Dasm1, respectively. Alternative splicing generates an additional isoform that is truncated following the fifth Ig-like domain. Dasm1 is expressed in the dorsal root and trigeminal ganglia, forebrain, cortex, dentate gyrus, pyramidal cells, Purkinje cells, and hippocampal CA1 interneurons (2-5). It localizes to dendrites, cell bodies, and post-synaptic densities (3, 6). Dasm1 functions as a homophilic adhesion protein that supports the maintenance of inhibitory synapses as well as inhibitory neurotransmission (5, 6).

References

Hansen, M. and P.S. Walmod (2013) Neurochem. Res. 38:1236.
Doudney, K. et al. (2002) Genomics 79:663.
Shi, S.-H. et al. (2004) Proc. Natl. Acad. Sci. USA 101:13341.
Mishra, A. et al. (2008) Mol. Cell. Biol. 28:2782.
Mishra, A. et al. (2014) J. Neurosci. 34:4187.
Shi, S.-H. et al. (2004) Proc. Natl. Acad. Sci. USA 101:13346.

Long Name

Immunoglobulin Superfamily, Member 9

Alternate Names

Dasm1, FP18798, IGSF9A, KIAA1355, Nrt1, Protein Turtle Homolog A, TUTLA

Entrez Gene IDs

57549 (Human); 93842 (Mouse); 304982 (Rat)

Gene Symbol

IGSF9

UniProt

Q05BQ1

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This product is provided under an agreement between Life Technologies Corporation and R&D Systems, Inc, and the manufacture, use, sale or import of this product is subject to one or more US patents and corresponding non-US equivalents, owned by Life Technologies Corporation and its affiliates. The purchase of this product conveys to the buyer the non-transferable right to use the purchased amount of the product and components of the product only in research conducted by the buyer (whether the buyer is an academic or for-profit entity). The sale of this product is expressly conditioned on the buyer not using the product or its components (1) in manufacturing; (2) to provide a service, information, or data to an unaffiliated third party for payment; (3) for therapeutic, diagnostic or prophylactic purposes; (4) to resell, sell, or otherwise transfer this product or its components to any third party, or for any other commercial purpose. Life Technologies Corporation will not assert a claim against the buyer of the infringement of the above patents based on the manufacture, use or sale of a commercial product developed in research by the buyer in which this product or its components was employed, provided that neither this product nor any of its components was used in the manufacture of such product. For information on purchasing a license to this product for purposes other than research, contact Life Technologies Corporation, Cell Analysis Business Unit, Business Development, 29851 Willow Creek Road, Eugene, OR 97402, Tel: (541) 465-8300. Fax: (541) 335-0354.

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Mouse IGSF9 Alexa Fluor® 488-conjugated Antibody

R&D Systems, part of Bio-Techne | Catalog # FAB9140G

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Background: IGSF9