Format

Send to

Choose Destination
See comment in PubMed Commons below
Cell. 2009 Apr 17;137(2):344-55. doi: 10.1016/j.cell.2009.01.057. Epub 2009 Apr 2.

DEX-1 and DYF-7 establish sensory dendrite length by anchoring dendritic tips during cell migration.

Author information

1
The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA.

Abstract

Cells are devices whose structures delimit function. For example, in the nervous system, neuronal and glial shapes dictate paths of information flow. To understand how cells acquire their shapes, we examined the formation of a sense organ in C. elegans. Using time-lapse imaging, we found that sensory dendrites form by stationary anchoring of dendritic tips during cell-body migration. A genetic screen identified DEX-1 and DYF-7, extracellular proteins required for dendritic tip anchoring, which act cooperatively at the time and place of anchoring. DEX-1 and DYF-7 contain, respectively, zonadhesin and zona pellucida domains, and DYF-7 self-associates into multimers important for anchoring. Thus, unlike other dendrites, amphid dendritic tips are positioned by DEX-1 and DYF-7 without the need for long-range guidance cues. In sequence and function, DEX-1 and DYF-7 resemble tectorins, which anchor stereocilia in the inner ear, suggesting that a sensory dendrite anchor may have evolved into part of a mechanosensor.

PMID:
19344940
PMCID:
PMC2673108
DOI:
10.1016/j.cell.2009.01.057
[Indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science Icon for PubMed Central
    Loading ...
    Support Center