Natural variation in a chloride channel subunit confers avermectin resistance in C. elegans.
Natural variation in a chloride channel subunit confers avermectin resistance in C. elegans.
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DOI:
10.1126/science.1214318
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发表时间:
2012-02-03
期刊:
影响因子:
--
通讯作者:
Kruglyak L
中科院分区:
文献类型:
--
作者:
Ghosh R;Andersen EC;Shapiro JA;Gerke JP;Kruglyak L
Resistance of nematodes to anthelmintics such as avermectins has emerged as a major global health and agricultural problem, but genes conferring natural resistance to avermectins are unknown. We show that a naturally occurring four amino-acid deletion in the ligand-binding domain of GLC-1, the alpha-subunit of a glutamate-gated chloride channel, confers resistance to avermectins in the model nematode Caenorhabditis elegans. We also find that the same variant confers resistance to the avermectin-producing bacterium Streptomyces avermitilis. Population-genetic analyses identified two highly divergent haplotypes at the glc-1 locus that have been maintained at intermediate frequencies by long-term balancing selection. These results implicate variation in glutamate-gated chloride channels in avermectin resistance and provide a mechanism by which such resistance can be maintained.
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