trpa-1;unc-43

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Genetic mutants with trpa-1, unc-43 alterations

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

Temperature °C
20
Diet
NGM
Lifespan (days)
22.41
Lifespan change (compared to wild type)
14.05%
Phenotype
trpa-1 transgene can further extend the lifespan of unk-43 mutant worms.
Lifespan comparisons
Double mutant trpa-1(xuEx601);unc-43(n498) has a lifespan of 22.41 days, while single mutant trpa-1(xuEx601) has a lifespan of 22.41 days, single mutant unc-43(n498) has a lifespan of 19.31 days and wild type has a lifespan of 19.65 days.
Type of interaction
See methods
Opposite lifespan effects of single mutants
Citation
View abstract
Xiao R et al., 2013, A genetic program promotes C. elegans longevity at cold temperatures via a thermosensitive TRP channel. Cell. 152(4):806-17 23415228 Click here to select all mutants from this PubMed ID in the graph
Abstract
Both poikilotherms and homeotherms live longer at lower body temperatures, highlighting a general role of temperature reduction in lifespan extension. However, the underlying mechanisms remain unclear. One prominent model is that cold temperatures reduce the rate of chemical reactions, thereby slowing the rate of aging. This view suggests that cold-dependent lifespan extension is simply a passive thermodynamic process. Here, we challenge this view in C. elegans by showing that genetic programs actively promote longevity at cold temperatures. We find that TRPA-1, a cold-sensitive TRP channel, detects temperature drop in the environment to extend lifespan. This effect requires cold-induced, TRPA-1-mediated calcium influx and a calcium-sensitive PKC that signals to the transcription factor DAF-16/FOXO. Human TRPA1 can functionally substitute for worm TRPA-1 in promoting longevity. Our results reveal a previously unrecognized function for TRP channels, link calcium signaling to longevity, and, importantly, demonstrate that genetic programs contribute to lifespan extension at cold temperatures.

Search genes: trpa-1 unc-43

Entrez ID
Symbol
GenAge
Wormbase ID

178118
trpa-1
View on GenAge (trpa-1)
WBGene00007801

TRPA cation channel homolog;Transient receptor potential cation channel subfamily A member 1 homolog

Locus: CELE_C29E6.2

Wormbase description: trpa-1 encodes a transient receptor potential (TRP) ion channel orthologous to the vertebrate and Drosophila TRPA1 channels; in C. elegans, trpa-1 activity is required for specific mechanosensory behaviors such as nose-touch avoidance and touch-mediated foraging; when expressed in mammalian cells, TRPA-1 exhibits channel activity in response to mechanical stimulation; TRPA-1::GFP reporters are expressed in a number of different cell types including sensory neurons, muscle, and epithelial cells.

Entrez ID
Symbol
GenAge
Wormbase ID

177921
unc-43
View on GenAge (unc-43)
WBGene00006779

Calcium/calmodulin-dependent protein kinase type II;hypothetical protein

Locus: CELE_K11E8.1

Wormbase description: unc-43 encodes the C. elegans ortholog of type II calcium/calmodulin-dependent protein kinase (CaMKII); unc-43 activity is required for a number of processes, including locomotion, neuronal cell fate specification and regulation of synaptic density, egg laying, defecation, and meiotic maturation; in regulating some of these processes, unc-43 acts in concert with MAPKKK and G protein signaling pathways; UNC-43 is expressed in neurons, oocytes, and gonadal sheath cells; UNC-43 can regulate the activity of the EGL-2 ether-a-go-go potassium channel with which it physically interacts.

Orthologs of trpa-1;unc-43 in SynergyAge

Show in SynergyAge
Species	Gene

Not in SynergyAge
Species	Gene
Mus musculus	Camk2a;Trpa1
Mus musculus	Camk2b;Trpa1
Mus musculus	Camk2d;Trpa1
Mus musculus	Camk2g;Trpa1

Orthologs of trpa-1 in SynergyAge

Show in SynergyAge
Species	Gene

Not in SynergyAge
Species	Gene
Drosophila melanogaster	TrpA1
Mus musculus	Trpa1

Orthologs of unc-43 in SynergyAge

Show in SynergyAge
Species	Gene

Not in SynergyAge
Species	Gene
Mus musculus	Camk2a
Mus musculus	Camk2b
Mus musculus	Camk2d
Mus musculus	Camk2g

About

SynergyAge database hosts high-quality, manually curated information about the synergistic and antagonistic lifespan effects of genetic interventions in model organisms, also allowing users to explore the longevity relationships between genes in a visual way.