Journal
MOLECULAR AND CELLULAR NEUROSCIENCE
Volume 39, Issue 1, Pages 83-94Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.mcn.2008.05.019
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Funding
- National Institute on Deafness and Other Communication Disorders (NIDCD)
- NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS [Z01DC000003] Funding Source: NIH RePORTER
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SALMs are a family of five adhesion molecules whose expression is largely restricted to the CNS. Initial reports showed that SALM1 functions in neurite Outgrowth while SALM2 is involved in synapse formation. To investigate the function of SALMs in detail, we asked if all five are involved in neurite outgrowth. Expression of epitope-tagged Proteins in cultured hippocampal neurons showed that SALMs are distributed throughout neurons, including axons, dendrites, and growth cones. Over-expression of each SALM resulted in enhanced neurite outgrowth, but with different phenotypes. Neurite Outgrowth could be reduced by applying antibodies targeting the extracellular leucine rich regions of SALMs and with RNAi. Through over-expression of deletion constructs, we found that the C-terminal PDZ binding domains of SALMs 1-3 are required for most aspects Of neurite outgrowth. In addition, by using a chimera of SALMs 2 and 4, we found that the N-terminus is also-involved in neurite outgrowth. Published by Elsevier Inc.
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