Difference between revisions of "Q-junction"
Line 28: | Line 28: | ||
::: <span style="font-size:105%; color:##424242">'''ยป Keywords'''</span> | ::: <span style="font-size:105%; color:##424242">'''ยป Keywords'''</span> | ||
<div class="mw-collapsible-content"> | <div class="mw-collapsible-content"> | ||
::: '''Specific''' | |||
::::ยป [[Complex III]] | |||
::::ยป [[Convergent electron flow]] | |||
::: '''General''' | |||
::::ยป [[Categories of SUIT protocols]] | ::::ยป [[Categories of SUIT protocols]] | ||
::::ยป [[Choline dehydrogenase]] | ::::ยป [[Choline dehydrogenase]] | ||
::::ยป [[Complex I]] | ::::ยป [[Complex I]] | ||
::::ยป [[Complex II]]ย ย | ::::ยป [[Complex II]]ย ย | ||
::::ยป [[Dihydro-orotate dehydrogenase]] | ::::ยป [[Dihydro-orotate dehydrogenase]] | ||
::::ยป [[Electron-transferring flavoprotein complex]] ย | ::::ยป [[Electron-transferring flavoprotein complex]] ย | ||
Line 41: | Line 44: | ||
::::ยป [[N-junction]] ย | ::::ยป [[N-junction]] ย | ||
::::ยป [[NS-linked electron flow]] | ::::ยป [[NS-linked electron flow]] | ||
::::ยป [[Pathway control state]]s ย | ::::ยป [[Pathway control state]]s | ||
ย | |||
</div> | </div> | ||
</div> | </div> |
Revision as of 10:58, 9 May 2017
Description
The Q-junction is a junction for convergent electron flow in the electron transfer system (ETS) from type N substrates and mt-matix dehydrogenases through Complex I (CI), from type F substrates and FA oxidation through electron-transferring flavoprotein complex (CETF), from succinate (S) through Complex II (CII), from glycoreophosphate (Gp) through glycerophosphate dehydrogenase complex (CGpDH), from choline through choline dehydrogenase, from dihydro-orotate through dihydro-orotate dehydrogenase, and other enzyme complexes into the Q-cycle (ubiquinol/ubiquinone), and further downstream to Complex III (CIII) and CIV. The concept of the Q-junction, with the N-junction and F-junction upstream, provides the rationale for defining pathway control states and categories of SUIT protocols.
Reference: Gnaiger 2009 Int J Biochem Cell Biol, Gnaiger 2014 MitoPathways
MitoPedia concepts:
MiP concept,
SUIT concept
MitoPedia methods:
Respirometry
MitoPedia topics:
Enzyme
Contributed by Gnaiger E 2010-08-15; edited 2016-02-12, 2016-03-28.
- Convergent NS-linked electron flow at the Q-junction, exerting an additive effect on flux, versus electron gaiting for separation of single N- and S-input pathways (upper panel: Gnaiger 2009; lower panel: Hatefi 1962 J Biol Chem-XLII). Modified Fig. 1.5 in Gnaiger 2014 MitoPathways.
- ยป Keywords
- Specific
- General
- ยป Categories of SUIT protocols
- ยป Choline dehydrogenase
- ยป Complex I
- ยป Complex II
- ยป Dihydro-orotate dehydrogenase
- ยป Electron-transferring flavoprotein complex
- ยป Electron transfer system
- ยป F-junction
- ยป Glycerophosphate dehydrogenase complex
- ยป N-junction
- ยป NS-linked electron flow
- ยป Pathway control states
- General
Related MitoPedia pages
- Electron transfer system, ETS
- Pathway control states
- Coupling control state E