These properties of IRSp53 may explain why uncoupling between membrane deformation and actin assembly is virtually undetectable in normal conditions.
It is well known that Pgc-1α is intimately involved in adaptive thermogenesis via the induction of the mitochondrial inner membrane uncoupling protein Ucp-1 [55].
Mitochondrial inner membrane uncoupling proteins (UCPs) facilitate transmembrane (TM) proton flux and consequently reduce the membrane potential and ATP production.
This profile of ERα activation by E4, uncoupling nuclear and membrane activation, characterizes E4 as a selective ER modulator which could have medical applications that should now be considered further.
A primary molecule involved in cold-induced thermogenesis is the UCP1, the activation of which allows protons to flow back through the mitochondrial membrane, uncoupling ATP production, and resulting in the generation of heat (Lowell and Spiegelman 2000).
Among these regulatory elements, proteins that synthesize (ATP synthase), dissipate (alternative oxidase, AOX; and mitochondrial inner membrane uncoupling proteins, UCP), transport [adenosine diphosphate (ADP)/ATP carrier, AAC] and regulate (sucrose non-fermenting-1-related kinase, SnRK) ATP have attracted considerable attention.
This original profile of ERα activation, uncoupling nuclear and membrane activation is, to the best of our knowledge, unique and characterizes E4 as a natural endogenous selective ER modulator (Table 4), reinforcing the idea that medical applications should be pursued further.
Results: In human skeletal muscle cells exposed to propofol, respiratory chain capacity was decreased and uncoupling of inner mitochondrial membrane was increased.
For instance, oxidants can activate uncoupling proteins that reduce membrane potential.
UCPs (uncoupling proteins) are inner membrane proteins specialized in inducible proton conductance.
