BP

GO:0006120

mitochondrial electron transport, NADH to ubiquinone

The transfer of electrons from NADH to ubiquinone that occurs during oxidative phosphorylation, mediated by the multisubunit enzyme known as complex I.

NAS|TAS

BP

GO:0006979

response to oxidative stress

Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of oxidative stress, a state often resulting from exposure to high levels of reactive oxygen species, e.g. superoxide anions, hydrogen peroxide (H2O2), and hydroxyl radicals.

IDA

BP

GO:0032981

mitochondrial respiratory chain complex I assembly

The aggregation, arrangement and bonding together of a set of components to form mitochondrial respiratory chain complex I.

TAS

CC

GO:0005654

nucleoplasm

That part of the nuclear content other than the chromosomes or the nucleolus.

IDA

CC

GO:0005739

mitochondrion

A semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration.

IDA

CC

GO:0005743

mitochondrial inner membrane

The inner, i.e. lumen-facing, lipid bilayer of the mitochondrial envelope. It is highly folded to form cristae.

TAS

CC

GO:0005747

mitochondrial respiratory chain complex I

A protein complex located in the mitochondrial inner membrane that forms part of the mitochondrial respiratory chain. It contains about 25 different polypeptide subunits, including NADH dehydrogenase (ubiquinone), flavin mononucleotide and several different iron-sulfur clusters containing non-heme iron. The iron undergoes oxidation-reduction between Fe(II) and Fe(III), and catalyzes proton translocation linked to the oxidation of NADH by ubiquinone.

IDA|NAS

CC

GO:0016021

integral component of membrane

The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.

IEA

CC

GO:0031965

nuclear membrane

Either of the lipid bilayers that surround the nucleus and form the nuclear envelope; excludes the intermembrane space.

IDA

CC

GO:0070062

extracellular exosome

A membrane-bounded vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm.

IDA

MF

GO:0008137

NADH dehydrogenase (ubiquinone) activity

Catalysis of the reaction: NADH + H+ + ubiquinone = NAD+ + ubiquinol.

NAS