NCAM2/OCAM/RNCAM: cell adhesion molecule with a role in neuronal compartmentalization

Malene Winther, Vladimir Berezin, Peter Schledermann Walmod

28 Citations (Scopus)

Abstract

Neural cell adhesion molecules 2 (NCAM2/OCAM/RNCAM), is a paralog of NCAM1. The protein exists in a transmembrane and a lipid-anchored isoform, and has an ectodomain consisting of five immunoglobulin modules and two fibronectin type 3 homology modules. Structural models of the NCAM2 ectodomain reveal that it facilitates cell adhesion through reciprocal interactions between the membrane-distal immunoglobulin modules. There are no known heterophilic NCAM2 binding partners, and NCAM2 is not glycosylated with polysialic acid, a posttranslational modification known to be a major modulator of NCAM1-mediated processes. This suggests that NCAM2 has a function or mode of action distinctly different from that of NCAM1. NCAM2 is primarily expressed in the brain, where it is believed to stimulate neurite outgrowth and to facilitate dendritic and axonal compartmentalization.
Original languageEnglish
JournalInternational Journal of Biochemistry & Cell Biology
Volume44
Issue number3
Pages (from-to)441-446
Number of pages6
ISSN1357-2725
DOIs
Publication statusPublished - Mar 2012

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