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NADH dehydrogenase (ubiquinone), alpha 1
NADH dehydrogenase () 1 alpha subcomplex subunit 1 is a protein that in humans is encoded by the ''NDUFA1'' gene.〔(【引用サイトリンク】 url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=4694 )〕 The NDUFA1 protein is a subunit of NADH dehydrogenase (ubiquinone), which is located in the mitochondrial inner membrane and is the largest of the five complexes of the electron transport chain. Mutations in the NDUFA1 gene are associated with mitochondrial Complex I deficiency.〔 ==Structure== The NDUFA1 gene is located on the long q arm of the X chromosome at position 24 and it spans 5,176 base pairs.〔 The NDUFA1 gene produces an 8.1 kDa protein composed of 70 amino acids.〔(【引用サイトリンク】 work = Cardiac Organellar Protein Atlas Knowledgebase (COPaKB) )〕 NDUFA1 is a subunit of the enzyme NADH dehydrogenase (ubiquinone), the largest of the respiratory complexes. The structure is L-shaped with a long, hydrophobic transmembrane domain and a hydrophilic domain for the peripheral arm that includes all the known redox centers and the NADH binding site.〔 NDUFA1 is one of about 31 hydrophobic subunits that form the transmembrane region of Complex I. It has been noted that the N-terminal hydrophobic domain has the potential to be folded into an alpha helix spanning the inner mitochondrial membrane with a C-terminal hydrophilic domain interacting with globular subunits of Complex I. The highly conserved two-domain structure suggests that this feature is critical for the protein function and that the hydrophobic domain acts as an anchor for the NADH dehydrogenase (ubiquinone) complex at the inner mitochondrial membrane.〔
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