Complex I

Complex I
NADH-Dehydrogenase

NADH-Dehydrogenase

Schematische Darstellung von Complex I in der Zellmembran
Bezeichner
Gen-Name(n) NDH
Transporter-Klassifikation
TCDB 3.D.1
Bezeichnung Protonenverschiebende NADH-Dehydrogenase
Enzymklassifikation
EC, Kategorie 1.6.5.3  Oxidoreduktase
Reaktionsart Redoxreaktion
Substrat NADH + Ubichinon
Produkte NAD+ + Ubichinol

NADH-Dehydrogenase, genauer NADH-Ubichinon-Oxidoreduktase (systematischer Name), ist ein Enzymkomplex, der Elektronentransfer in Mitochondrien mit dem Membrantransport von Protonen oder Natrium koppelt. Er kommt in allen Tieren vor, ähnliche Transporter gibt es jedoch in allen Lebewesen. Er wird auch Komplex I der mitochondrialen Atmungskette genannt.

Das Enzym katalysiert in einer gekoppelten Reaktion die Oxidation von NADH mit der Reduktion von Coenzym Q und dem Transport von Protonen oder Natrium aus dem Mitochondrium hinaus:[1][2]

NADH + Ubichinon + 4 H+innen → NAD+ + Ubichinol + 4 H+außen

Inhaltsverzeichnis

Inhibitoren

Siehe auch

Weitere Enzym-Komplexe der mitochondrialen Atmungskette:

Einzelnachweise

  1. Homologene-Eintrag
  2. TCDB: 3.D.1 The Proton-translocating NADH Dehydrogenase (NDH) Family
  • Sazanov, L.A. & Hinchliffe, P. (2006): Structure of the hydrophilic domain of respiratory complex I from Thermus thermophilus. In: Science. Bd. 311, S. 1430-1436. PMID 16469879
  • Brandt, U. (2006): Energy converting NADH:quinone oxidoreductase (complex I). In: Annu. Rev. Biochem. Bd. 75, S. 69-92. PMID 16756485.
  • Flemming, D. & Friedrich, T. (2005): Die modulare Evolution eines Enzymkomplexes. In: Bioforum. Jg. 2005, Nr. 6. PDF

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