____ _ _ _ _
| _ \ ___ | |_ (_) _ __ ___ __| | (_) __ _
| |_) | / _ \ | __| | | | '_ \ / _ \ / _| | | | / _ |
| _ < | __/ | |_ | | | |_) | | __/ | (_| | | | | (_| |
|_| \_\ \___| \__| |_| | .__/ \___| \__,_| |_| \__,_|
|_|
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Symporter
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
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Ein Symporter ist ein Protein, das einen Membrantransport von mindestens zwei MolekΓΌlen in gleicher Richtung vermittelt.cite-ref-1[1] Weitere Proteintypen des Membrantransportes sind Antiporter und Uniporter.
Contents
β’ Eigenschaften
β’ Literatur
β’ Weblinks
β’ Einzelnachweise
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
Eigenschaften
Ein Symporter ist ein Membranprotein, das den Transport von mehreren MolekΓΌlen in gleicher Richtung (Symport) meistens durch einen sekundΓ€r aktiven Transport ermΓΆglicht. Der sekundΓ€r aktive Transport wird energetisch durch einen Gradienten der Konzentration eines der transportierten MolekΓΌlsorten getrieben, der unter Adenosintriphosphat-Verbrauch aufgebaut wurde (daher die Bezeichnung sekundΓ€r aktiv). Manche Symporter verbrauchen dagegen beim Symport ATP (primΓ€r aktiv).
Symporter kΓΆnnen in verschiedene Klassen eingeteilt werden, darunter Dopamin-Plasmamembran-Transportproteine, GABA-Plasmamembran-Transportproteine, Glutamat-Plasmamembran-Transportproteine, Glycin-Plasmamembran-Transportproteine, Norepinephrin-Plasmamembran-Transportproteine, Protonen-Phosphat-Symporter, Serotonin-Plasmamembran-Transportproteine, Natrium-Chlorid-Symporter, Natrium-Glucose-Transportproteine, Natrium-Bicarbonat-Symporter, Natrium-Prolin-Symporter, Natrium-Phosphat-Cotransporter-Proteine und Natrium-Kalium-Chlorid-Symporter.
Literatur
β’ Jeremy M. Berg, John L. Tymoczko, Lubert Stryer: Biochemistry. 5. Auflage. Freeman, New York 2002, ISBN 0-7167-4684-0, online verfΓΌgbar beim NCBI Bookshelf.
β’ Donald Voet, Judith G. Voet: Biochemistry. 3. Auflage, John Wiley & Sons, New York 2004. ISBN 0-471-19350-X.
Weblinks
Einzelnachweise