galya <
[email protected]> wrote:
> DZ <
[email protected]> wrote
> > galya <
[email protected]> wrote:
> > >
http://www.newscientist.com/opinion/opinterview.jsp;jsessionid=KEDEFONLCKFB?id=ns24171
> >
> > Which of the insuline receptors in humans are evolutionary homologous to C. elegans daf-2?
> Daf-2 is one of three (I think) "longevity genes" that determine life span in C. elegans. I am
> not sure about the homologies in humans but the encoded homologous proteins in humans are those
> that regulate insulin and insulin growth factor I (IGF-I) .
Great. There appear to be some epidemiological studies of these genes on humans: e.g.
http://tinyurl.com/rgx3 (associations of insulin receptor polymorphisms with longevity). And more by
Barbieri, Bonafe, et al.
DZ
> The following is a paragraph from the introduction to the full paper (free) by Wolkow CA, Munoz
> MJ, Riddle DL, Ruvkun G. Insulin receptor substrate and p55 orthologous adaptor proteins function
> in the Caenorhabditis elegans daf-2/insulin-like signaling pathway. J Biol Chem. 2002 Dec
> 20;277(51):49591-7. Epub 2002 Oct 18. PMID: 12393910 [PubMed - indexed for MEDLINE] (@:
>
http://www.jbc.org/cgi/content/full/277/51/49591)
>
> <<An insulin-like signaling pathway controls development and lifespan in Caenorhabditis elegans
> (1-3). Genetic studies have shown that the
> C. elegans insulin-like pathway utilizes many of the same components as the human insulin and
> insulin-like growth factor (IGF-I)1 pathways.
> C. elegans insulin-like signaling requires the genes daf-2, encoding an insulin/IGF-I
> receptor-like protein, age-1, a homolog of vertebrate p110 catalytic subunits of
> phosphoinositide 3-kinase (PI3K), akt-1 and akt-2, encoding AKT/protein kinase B-like proteins
> activated by the phospholipid products of PI3K, and pdk-1, encoding a PDK-1-like kinase also
> required for AKT/protein kinase B activation (1, 4-6).>>
>
> galya
--
Wheel discovery department