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Angaben zur Quelle [Bearbeiten]

Titel    Protein kinase A
Verlag    (Wikipedia)
Datum    15. March 2007
URL    http://en.wikipedia.org/w/index.php?title=Protein_kinase_A&oldid=115246909

Literaturverz.   

no
Fußnoten    no
Fragmente    1


Fragmente der Quelle:
[1.] Dsa/Fragment 019 01 - Diskussion
Zuletzt bearbeitet: 2016-08-02 19:07:34 WiseWoman
Dsa, Fragment, Gesichtet, KomplettPlagiat, SMWFragment, Schutzlevel sysop, Wikipedia Protein kinase A 2007

Typus
KomplettPlagiat
Bearbeiter
Hindemith
Gesichtet
Yes.png
Untersuchte Arbeit:
Seite: 19, Zeilen: 1-10
Quelle: Wikipedia Protein kinase A 2007
Seite(n): 1 (online source), Zeilen: -
Regulation

Protein kinase A has several functions in the cell, including regulation of glycogen, sugar, and lipid metabolism. It is controlled by cAMP: in the absence of cAMP, the kinase is a tetramer of two regulatory and two catalytic subunits (R2C2), with the regulatory subunits blocking the catalytic center of the catalytic subunits. Binding of cAMP to the regulatory subunit leads to dissociation of active RC dimers. Also, the catalytic subunit itself can be regulated by phosphorylation. Downregulation of protein kinase A occurs by a feedback mechanism: one of the substrates that are activated by the kinase is a phosphodiesterase, which converts cAMP to AMP, thus reducing the amount of cAMP that can activate protein kinase A.

Regulation

Protein kinase A has several functions in the cell, including regulation of glycogen, sugar, and lipid metabolism. It is controlled by cAMP: in the absence of cAMP, the kinase is a tetramer of two regulatory and two catalytic subunits (R2C2), with the regulatory subunits blocking the catalytic center of the catalytic subunits. Binding of cAMP to the regulatory subunit leads to dissociation of active RC dimers. Also, the catalytic subunit itself can be regulated by phosphorylation.

Downregulation of protein kinase A occurs by a feedback mechanism: one of the substrates that is activated by the kinase is a phosphodiesterase, which converts cAMP to AMP, thus reducing the amount of cAMP that can activate protein kinase A.

Anmerkungen

No source is given.

Sichter
(Hindemith), WiseWoman

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