eat-2;sams-1

There is no network for this step.

Fullscreen mode

Hide graph

Legend

Genetic mutants with eat-2, sams-1 alterations

Names of genes are ordered alphabetically. For the order of interventions, please see the specific paper.

Temperature °C
20
Lifespan (days)
26.7
Lifespan comparisons
Double mutant eat-2(ad1116);sams-1(RNAi) has a lifespan of 26.7 days, while single mutant eat-2(ad1116) has a lifespan of 24.9 days.
Citation
View abstract
Hansen M et al., 2005, New genes tied to endocrine, metabolic, and dietary regulation of lifespan from a Caenorhabditis elegans genomic RNAi screen. PLoS Genet. 1(1):119-28 16103914 Click here to select all mutants from this PubMed ID in the graph
Abstract
Most of our knowledge about the regulation of aging comes from mutants originally isolated for other phenotypes. To ask whether our current view of aging has been affected by selection bias, and to deepen our understanding of known longevity pathways, we screened a genomic Caenorhabditis elegans RNAi library for clones that extend lifespan. We identified 23 new longevity genes affecting signal transduction, the stress response, gene expression, and metabolism and assigned these genes to specific longevity pathways. Our most important findings are (i) that dietary restriction extends C. elegans' lifespan by down-regulating expression of key genes, including a gene required for methylation of many macromolecules, (ii) that integrin signaling is likely to play a general, evolutionarily conserved role in lifespan regulation, and (iii) that specific lipophilic hormones may influence lifespan in a DAF-16/FOXO-dependent fashion. Surprisingly, of the new genes that have conserved sequence domains, only one could not be associated with a known longevity pathway. Thus, our current view of the genetics of aging has probably not been distorted substantially by selection bias.

Temperature °C
20
Lifespan (days)
28.2
Lifespan comparisons
Double mutant eat-2(ad1116);sams-1(RNAi) has a lifespan of 28.2 days, while single mutant eat-2(ad1116) has a lifespan of 28.4 days.
Citation
View abstract
Hansen M et al., 2005, New genes tied to endocrine, metabolic, and dietary regulation of lifespan from a Caenorhabditis elegans genomic RNAi screen. PLoS Genet. 1(1):119-28 16103914 Click here to select all mutants from this PubMed ID in the graph
Abstract
Most of our knowledge about the regulation of aging comes from mutants originally isolated for other phenotypes. To ask whether our current view of aging has been affected by selection bias, and to deepen our understanding of known longevity pathways, we screened a genomic Caenorhabditis elegans RNAi library for clones that extend lifespan. We identified 23 new longevity genes affecting signal transduction, the stress response, gene expression, and metabolism and assigned these genes to specific longevity pathways. Our most important findings are (i) that dietary restriction extends C. elegans' lifespan by down-regulating expression of key genes, including a gene required for methylation of many macromolecules, (ii) that integrin signaling is likely to play a general, evolutionarily conserved role in lifespan regulation, and (iii) that specific lipophilic hormones may influence lifespan in a DAF-16/FOXO-dependent fashion. Surprisingly, of the new genes that have conserved sequence domains, only one could not be associated with a known longevity pathway. Thus, our current view of the genetics of aging has probably not been distorted substantially by selection bias.

Search genes: eat-2 sams-1

Entrez ID
Symbol
GenAge
Wormbase ID

175072
eat-2
View on GenAge (eat-2)
WBGene00001133

Neuronal acetylcholine receptor subunit eat-2

Locus: CELE_Y48B6A.4

Wormbase description: eat-2 encodes a ligand-gated ion channel subunit most closely related to the non-alpha-subunits of nicotinic acetylcholine receptors (nAChR); EAT-2 functions postsynaptically in pharyngeal muscle to regulate the rate of pharyngeal pumping; eat-2 is also required for normal life span and defecation; a functional EAT-2::GFP fusion protein localizes to two small dots near the junction of pharyngeal muscles pm4 and pm5, which is the site of the posterior-most MC motor neuron processes and the MC synapse; eat-2 genetically interacts with eat-18, which encodes a predicted novel transmembrane protein expressed in pharyngeal muscle and required for proper function of pharyngeal nicotonic receptors.

Entrez ID
Symbol
GenAge
Wormbase ID

181370
sams-1
View on GenAge (sams-1)
WBGene00008205

Probable S-adenosylmethionine synthase 1

Locus: CELE_C49F5.1

Wormbase description: sams-1 encodes an S-adenosyl methionine synthetase; by homology, SAMS-1 is predicted to function as a methyl-group donor in many biochemical reactions; sams-1 expression levels are negatively regulated by dietary restriction (as seen in eat-2 mutant animals), suggesting that increased lifespan due to dietary restriction is due, in part, to reducing the activity of key metabolic enzymes; loss of sams-1 via RNAi can extend adult lifespan.

Orthologs of eat-2;sams-1 in SynergyAge

Show in SynergyAge
Species	Gene

Not in SynergyAge
Species	Gene

Orthologs of eat-2 in SynergyAge

Show in SynergyAge
Species	Gene

Orthologs of sams-1 in SynergyAge

Show in SynergyAge
Species	Gene

Not in SynergyAge
Species	Gene
Drosophila melanogaster	Sam-S
Mus musculus	Mat2a
Mus musculus	Mat1a