NCAM is ubiquitylated, endocytosed and recycled in neurons.

Abstract:

:The neural cell adhesion molecule NCAM plays an important role during neural development and in the adult brain. To study the intracellular trafficking of NCAM in neurons, two major isoforms, NCAM140 or NCAM180, were expressed in primary cortical neurons and in the rat B35 neuroblastoma cell line. NCAM was endocytosed and subsequently recycled to the plasma membrane, whereas only a minor fraction was degraded in lysosomes. In cortical neurons, endocytosis of NCAM was detected in the soma, neurites and growth cones in a developmentally regulated fashion. Furthermore, we found that NCAM is mono-ubiquitylated at the plasma membrane and endocytosis was significantly increased in cells overexpressing ubiquitin. Therefore, we propose that ubiquitylation represents an endocytosis signal for NCAM.

journal_name

J Cell Sci

journal_title

Journal of cell science

authors

Diestel S,Schaefer D,Cremer H,Schmitz B

doi

10.1242/jcs.019729

subject

Has Abstract

pub_date

2007-11-15 00:00:00

pages

4035-49

issue

Pt 22

eissn

0021-9533

issn

1477-9137

pii

jcs.019729

journal_volume

120

pub_type

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