Three dominant mutations of
mec-4, a gene needed for mechanosensation, cause the touch-receptor neurons of Caenorhabditis elegans to degenerate. With
deg-1, another C. elegans gene that can mutate to induce neuronal degeneration and that is similar in sequence,
mec-4 defines a new gene family. Cross-hybridizing sequences are detectable in other species, raising the possibility that degenerative conditions in other organisms may be caused by mutations in similar genes. All three dominant
mec-4 mutations affect the same amino acid. Effects of amino-acid substitutions at this position suggest that steric hindrance may induce the degenerative state.AD - Department of Biological Sciences, Columbia University, New York, New York 10027.FAU - Driscoll, MAU - Driscoll MFAU - Chalfie, MAU - Chalfie MLA - engSI - GENBANK/M31718SI - GENBANK/X52371SI - GENBANK/X52372SI - GENBANK/X56198SI - GENBANK/X56199SI - GENBANK/X57181SI - GENBANK/X57182SI - GENBANK/X57183SI - GENBANK/X57184SI - GENBANK/X58982PT - Journal ArticleCY - ENGLANDTA - NatureJID - 0410462SB - IMSB - S