Template:SUIT-012 O2 mt D027: Difference between revisions
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Revision as of 12:03, 23 January 2019
Steps and respiratory states
Step | State | Pathway | Q-junction | Comment - Events (E) and Marks (M) |
---|---|---|---|---|
1PM | PML | N | CI | PML or PM_L: Pyruvate & malate, N-LEAK respiration, NL
NADH-linked substrates (type N-pathway to Q). Template:SUIT L n |
2D | PMP | N | CI | 1PM;2D
NADH-linked substrates (type N-pathway to Q). OXPHOS capacity P (with saturating [ADP]), active OXPHOS state. |
2c | PMcP | N | CI | 1PM;2D;2c
NADH-linked substrates (type N-pathway to Q). OXPHOS capacity P (with saturating [ADP]), active OXPHOS state. Addition of cytochrome c yields a test for integrity of the mtOM (cytochrome c control efficiency). Stimulation by added cytochrome c would indicate an injury of the mtOM and limitation of respiration in the preceding state without added c due to loss of cytochrome c. Typically, cytochrome c is added immediately after the earliest ADP-activation step (OXPHOS capacity P with saturating [ADP]). |
3G | PGMP | N | CI | 1PM;2D;2c;3G
NADH-linked substrates (type N-pathway to Q). OXPHOS capacity P (with saturating [ADP]), active OXPHOS state. Addition of cytochrome c yields a test for integrity of the mtOM (cytochrome c control efficiency). Stimulation by added cytochrome c would indicate an injury of the mtOM and limitation of respiration in the preceding state without added c due to loss of cytochrome c. Typically, cytochrome c is added immediately after the earliest ADP-activation step (OXPHOS capacity P with saturating [ADP]). |
4U | PGME | N | CI | 1PM;2D;2c;3G;4U
Respiratory stimulation by simultaneous action of type N substrates & succinate, with convergent electron flow in the NS-pathway for reconstitution of TCA cycle function. Uncoupler titration (avoiding inhibition by high uncoupler concentrations) to obtain electron transfer (ET) capacity E (noncoupled ET-state). Test for limitation of OXPHOS capacity P by the phosphorylation system (ANT, ATP synthase, phosphate transporter) relative to ET capacity E in mt-preparations: E-P control efficiency and E-L coupling efficiency. In living cells: E-R control efficiency and E-L coupling efficiency. |
5Ama | ROX | 1PM;2D;2c;3G;4U;5Ama
Rox is the residual oxygen consumption in the ROX state, due to oxidative side reactions, estimated after addition of antimycin A (inhibitor of CIII). Rox is subtracted from oxygen flux as a baseline for all respiratory states, to obtain mitochondrial respiration (mt). |
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- Coupling control
- Pathway control
- ยป Electron transfer pathway
- ยป Fatty acid oxidation pathway control state, F
- ยป NADH electron transfer-pathway state, N
- ยป Succinate pathway control state, S
- ยป NS-pathway control state, NS
- ยป Glycerophosphate pathway control state, Gp
- ยป Complex IV single step, CIV
- ยป Anaplerotic pathway control state
- Pathway control
- Main fuel substrates
- ยป Glutamate, G
- ยป Glycerophosphate, Gp
- ยป Malate, M
- ยป Octanoylcarnitine, Oct
- ยป Pyruvate, P
- ยป Succinate, S
- Main fuel substrates
- Glossary