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Molec Cell - Cellular Metabolism
Chapter 11 - Cellular Metabolism
17
Microbiology
Undergraduate 4
11/13/2012

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Term
Mitochondrial Membrane
Definition
Double-membrane including outer membrane, inner membrane, and intermembrane space.
Term
Outer Mitochondrial Membrane
Definition
Highly permeable with porins, few membrane proteins
Term
Inner Mitochondrial Membrane
Definition
Where oxidative phosphorylation occurs, most membrane proteins here, highly impermeable.
Term
Mitochondrial Intermembrane Space
Definition
Stores protons used for ATP production
Term
Mitochondrial Matrix
Definition
Where the Citric Acid Cycle occurs as well as the conversion of pyruvate and fatty acids into Acetyl-CoA for use in the citric acid cycle.
Term
Glycolysis Enzymes
Definition
Act in concert to split or rearrange the intermediates and to move phosphate groups from one molecule to another such as ADP to ATP. These are the machinery that drive glycolysis.
Term
Krebs Cycle Enzymes
Definition
Located in the mitochondrial matrix. They facilitate the Citric Acid (Krebs) Cycle. The Citric Acid Cycle's purpose is to harvest energy from glucose which is converted to Acetyl-CoA prior to the Cycle.
Term
ATP Synthase
Definition
2 Parts: F0 and F1. F0 located in Inner Mitochondrial Membrane, F1 is suspended into the Mitochondrial Matrix. ATP Synthase uses the power from a proton gradient to add an inorganic phosphate to ADP to produce ATP.
Term
Glycerol Phosphate Shuttle
Definition
Located in the Inner Mitochondrial Membrane. It is a secondary mechanism for the transport of electrons from cytosolic NADH to mitochondrial carriers of the oxidative phosphorylation.
Term
TOM
Definition
(Translocase of Outer Membrane) Located in Outer Mitochondrial Membrane. Proteins move into the intermembrane space through the TOM complex. Uses ATP
Term
TIM
Definition
(Translocase of Inner Membrane) Located in the Inner Mitochondrial Membrane. TIMs serve to translocate through inner membrane as well as facilitate the insertion of proteins into the inner mitochondrial membrane.
Term
Tiny Tim
Definition
Located in the intermembrane space, Tiny Tim proteins serve as both chaperone and shuttle proteins.
Term
Mitochondrial Inheritance
Definition
Genes are inherited entirely from the maternal side, segregate randomly at meiosis or mitosis, and are variably expressed.
Term
Mendelian Inheritance
Definition
Dominant and Recessive alleles. Both parents give one copy, Dominant (if present) will be shown.
Term
Proteins Imported to Mitochondrial Matrix
Definition
Proteins unfolded and translocated by TOM. ETC establishes a proton gradient which helps move proteins through second translocon TIM. These proteins have a presequence of negatively charged amino acids, ATP used to 'ratchet' the protein into the matrix. Presequence is cleaved, and the protein is refolded.
Term
Proteins Imported to Inner Mitochondrial Membrane
Definition
Taken in by TOM, shuttled by Tiny Tim, placed in inner membrane by TIM.
Term
Proteins to Outer Mitochondrial Membrane
Definition
TOM used, requires ATP, chaperones (tiny tim) unfold and guide the proteins in cytosol and help refold after transfer.
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