Difference between revisions of "Malate-anaplerotic pathway control state"
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[[File:M-malic enzyme.jpg|right|300px|M and malic enzyme]] | |||
== M(L) == | == M(L) == | ||
Revision as of 16:38, 13 May 2016
- high-resolution terminology - matching measurements at high-resolution
Malate-anaplerotic pathway control state
Description
M: Malate alone does not support respiration of mt-preparations if oxaloacetate cannot be metabolized further in the absence of a source of acetyl-CoA. Transport of oxaloacetate across the inner mt-membrane is restricted particularly in liver. Mitochondrial citrate and 2-oxoglutarate (Ξ±-ketoglutarate) are depleted by antiport with malate. Succinate is lost from the mitochondria through the dicarboxylate carrier. OXPHOS capacity with malate alone is only 1.3% of that with Pyruvate&Malate in isolated rat skeletal muscle mitochondria. Many mammalian and non-mammalian mitochondria have a mt-isoform of NADP+- or NAD(P)+-dependent malic enzyme (ME), the latter being particularly active in proliferating cells. Then malate alone can support high respiratory activities.
Abbreviation: M
Reference: Gnaiger 2014 MitoPathways - Chapter 3.1
MitoPedia concepts:
Respiratory state,
SUIT state