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ATP-binding Cassette Sub-family G Member 1
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
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ABCG1 ist eins von zwei Proteinen in der Zellmembran von SΓ€ugetieren, das Cholesterin unter Verbrauch von ATP aus der Zelle pumpt, wo es auf der Membran schwimmt und von HDL-Partikeln aufgenommen wird (reverser Cholesterintransport). Es gehΓΆrt zur Familie der ABC-Transporter. In MΓ€use-Endothelzellen ohne ABCG1 sammeln sich Oxidationsprodukte des Cholesterins. Auch in Macrophagen und Monozyten spielt ABCG1 die Hauptrolle beim Cholesterintransport. In anderen Zellen wird dies von ABCA 1 ΓΌbernommen.cite-ref-2[2]cite-ref-3[3]
In Diabetes mellitus Typ 2-Patienten ist die Expression von ABCG1 in Monozyten erniedrigt, was zur Atherosklerose beitrΓ€gt, Γ€hnlich wie AktivitΓ€t des Enzyms 12/15-Lipoxygenase. Γberexpression allerdings fΓΌhrt ΓΌber Translokation von Phosphatidylserin und Caspase 3-Aktivierung zur Apoptose.cite-ref-4[4]cite-ref-5[5]cite-ref-6[6]cite-ref-7[7]
Contents
β’ Weblinks
β’ Einzelnachweise
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
Weblinks
β’ DβEustachio/Jassal/reactome: ABCG1-mediated transport of intracellular cholesterol to the cell surface
Einzelnachweise
cite-note-11. Homologe bei OMA
cite-note-55. β Mauldin JP, Nagelin MH, Wojcik AJ, et al.: Reduced expression of ATP-binding cassette transporter G1 increases cholesterol accumulation in macrophages of patients with type 2 diabetes mellitus. In: Circulation. 117. Jahrgang, Nr. 21, Mai 2008, S. 2785β92, doi:10.1161/CIRCULATIONAHA.107.741314, PMID 18490524.
cite-note-66. β Nagelin MH, Srinivasan S, Lee J, Nadler JL, Hedrick CC: 12/15-Lipoxygenase activity increases the degradation of macrophage ATP-binding cassette transporter G1. In: Arterioscler. Thromb. Vasc. Biol. 28. Jahrgang, Nr. 10, Oktober 2008, S. 1811β9, doi:10.1161/ATVBAHA.108.167908, PMID 18635820.
cite-note-77. β Seres L, Cserepes J, Elkind NB, et al.: Functional ABCG1 expression induces apoptosis in macrophages and other cell types. In: Biochim. Biophys. Acta. 1778. Jahrgang, Nr. 10, Oktober 2008, S. 2378β87, doi:10.1016/j.bbamem.2008.06.010, PMID 18619413.