MT-ND4L is a core subunit of Complex I (NADH:ubiquinone oxidoreductase), which catalyzes:
Electron Transfer: NADH → FMN → Fe-S clusters → ubiquinone (CoQ10) .
Proton Pumping: Four protons translocated per NADH oxidized, driving ATP synthesis .
Key functional regions include:
Transmembrane Helices: Critical for proton channel formation .
Overlap with MT-ND4: In humans, a 7-nucleotide overlap between MT-ND4L and MT-ND4 genes ensures coordinated translation .
Recombinant MT-ND4L is utilized in:
Disease Modeling:
Structural Studies:
Drug Screening: Targeting proton-pumping mechanisms for metabolic disease therapies .
The recombinant protein is generated via:
Cloning: Full-length MT-ND4L gene insertion into E. coli vectors .
Expression: Induced under optimized bacterial culture conditions .
Purification: Affinity chromatography (His-tag) followed by lyophilization .
| Step | Key Parameters |
|---|---|
| Lyophilization | Trehalose preserves protein stability |
| Storage | -20°C/-80°C; avoid freeze-thaw cycles |
LHON Association: The Val65Ala mutation disrupts proton translocation in humans, though mechanistic details remain unresolved .
Species-Specific Features: Microcebus griseorufus MT-ND4L provides insights into primate mitochondrial evolution and adaptation .