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Typus
KomplettPlagiat
Bearbeiter
Hindemith
Gesichtet
Yes.png
Untersuchte Arbeit:
Seite: 33, Zeilen: 1-13
Quelle: Boini 2006
Seite(n): 16, Zeilen: 21ff
The stimulatory effect of SGK1 on ENaC is related both to an increased number of channels in the plasma membrane (Lang F. et al., (2000) Proc Natl Acad Sci USA; Loffing J. et al., (2001) Am J Physiol Renal Physiol; Alvarez de la Rosa D. et al., (1999) J Biol Chem) and an activation of channels already present in the membrane (Diakov A. and Korbmacher C., (2004) J Biol Chem). The first effect likely involves the action of Nedd4-2, as there are several consensus phosphorylation motifs (2–3 depending on the splice variant) on Nedd4-2 and a PY-motif on SGK1 that may serve as a binding site for Nedd4-2.

In Xenopus oocytes, SGK1 induces Nedd4-2 phosphorylation on two of these phosphorylation sites (primarily Ser444, but also Ser338) (Embark HM. et al., (2004) Cell Physiol Biochem; Palmada M. et al., (2004) Am J Physiol Gastrointest Liver Physiol; Debonneville C. et al., (2001) EMBO J), which decreases the interaction of Nedd4-2 with ENaC and finally leads to an enhanced expression and activity of ENaC at the cell surface (Debonneville C. et al., (2001) EMBO J).

The stimulatory effect of SGK1 on ENaC is related both to an increased number of channels in the plasma membrane (Lang et al., 2000; Loffing et al., 2001; Alvarez de la Rosa et al., 1999) and an activation of channels already present in the membrane (Diakov and Korbmacher 2004). The first effect likely involves the action of Nedd4-2, as there are several consensus phosphorylation motifs (2–3 depending on the splice variant) on Nedd4-2 and a PY-motif on SGK1 that may serve as a binding site for Nedd4-2. In Xenopus oocytes, SGK1 induces Nedd4-2 phosphorylation on two of these phosphorylation sites (primarily Ser444, but also Ser338) (Embark et al., 2004; Palmada et al., 2004; Debonneville et al., 2001), which decreases the interaction of Nedd4-2 with ENaC and finally leads to an enhanced expression and activity of ENaC at the cell surface (Debonneville et al., 2001).
Anmerkungen

The source is not given.

Sichter
(Hindemith), WiseWoman

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