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Review
. 1997:59:659-89.
doi: 10.1146/annurev.physiol.59.1.659.

Molecular modeling of mechanotransduction in the nematode Caenorhabditis elegans

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Review

Molecular modeling of mechanotransduction in the nematode Caenorhabditis elegans

N Tavernarakis et al. Annu Rev Physiol. 1997.

Abstract

Genetic and molecular studies of touch avoidance in the nematode Caenorhabditis elegans have resulted in a molecular model for a mechanotransducing complex. mec-4 and mec-10 encode proteins hypothesized to be subunits of a mechanically gated ion channel that are related to subunits of the vertebrate amiloride-sensitive epithelial Na+ channel. Products of mec-5, a novel collagen, and mec-9, a protein that includes multiple Kunitz-type protease inhibitor repeats and EGF repeats, may interact with the channel in the extracellular matrix. Inside the cell, specialized 15-protofilament microtubules composed of mec-12 alpha-tubulin and mec-7 beta-tubulin may be linked to the mechanosensitive channel by stomatin-homologous MEC-2. MEC-4 and MEC-10 are members of a large family of C. elegans proteins, the degenerins. Two other degenerins, UNC-8 and DEL-1, are candidate components of a stretch-sensitive channel in motor neurons. Implications for advancing understanding of mechanotransduction in other systems are discussed.

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