We have investigated the role of the protein ubiquitous mitochondrial creatine kinase (uMtCK) in the formation and stabilization of inner and outer membrane contact sites. Using liver mitochondria isolated from transgenic mice, which, unlike control animals, express uMtCK in the liver, we found that the enzyme was associated with the mitochondrial membranes and, in addition, was located in memb...

1. The electrophoretic mobility values for mitochondria prepared from rat kidney and liver measured in 0.125m-potassium chloride-0.02m-tris, pH7.4, are: -0.78(s.e.m.+/-0.02)mu/sec./v/cm. (29 experiments) and -1.06(s.e.m.+/-0.01) mu/sec./v/cm. (21 experiments) respectively. 2. These mobility values are unaffected by washing and spontaneous swelling at 25 degrees , indicating a stable electrokine...

The intracellular distribution of herpes virus in embryonic liver was investigated. 80 per cent of the virus was found in the cytoplasm in what appears to be a form uncombined with mitochondria or nuclei. A significant amount of the virus (16 per cent) was found bound to the mitochondria by an intimate attachment. Furthermore evidence was obtained that the mitochondria from liver tissue undergo...

Herein, we demonstrate that calcium-independent phospholipase A(2)γ (iPLA(2)γ) is a critical mechanistic participant in the calcium-induced opening of the mitochondrial permeability transition pore (mPTP). Liver mitochondria from iPLA(2)γ(-/-) mice were markedly resistant to calcium-induced swelling in the presence or absence of phosphate in comparison with wild-type littermates. Furthermore, t...

Liver mitochondria from the great green goby Zosterisessor ophiocephalus (Pallas) normally exhibit bioenergetic variables (membrane potential 165+/-7 mV; respiratory control ratio 6.6+/-0.4; ADP/O ratio 1.85+/-0.8; means +/- s.e.m., N=6) and activities of physiological transport systems (phosphate/proton symporter, adenine nucleotide antiporter, Ca(2+) electrophoretic uniporter) comparable with...

Rabbit antiserum to cardiolipin, which is reactive with the polar head but not the nonpolar fatty acid moieties of cardiolipin, was used to explore the location of the polar head of cardiolipin in mitochondrial membranes. Only a few per cent of the cardiolipin in intact mitochondria from rat liver, blowfly flight muscle, Saccharomyces cerevisiae, and Neurospora and none of the cardiolipin in in...

condensed densely staining matrices surrounded by intact inner and outer membranes, and acceptor control ratios near 5 with 0-hydroxybutyrate as substrate. Mitochondria from the rapidly growing hepatoma 3924A, in contrast to those from hepatomas 96ISA and 7800 and from host liver, have diluted-appearing matrices, fail to oxidize 0-hydroxybutyrate, and have low acceptor control ratios in the pre...

Recent studies have demonstrated the existence of an intracellular (associated with mitochondria) tumour necrosis factor-alpha (TNF) binding protein. In an attempt to elucidate if this receptor could be involved in TNF action, we have incubated liver isolated mitochondria in the presence of recombinant murine TNF. The results show that the addition of TNF at concentrations as low as 10(-6) U/mi...

Discrete bodies which may be designated cytochondria occupy the greater part of the cytoplasm of liver cells. A part, but not all, of these bodies have the characteristics of mitochondria. They consist of a rim which stains deeply and a central part which stains faintly or remains unstained. In liver cells about portal spaces, in foci of regeneration, and in tumor cells the rims of the cytochon...