Cardiac mitochondrial matrix and respiratory complex protein phosphorylation

Cardiac mitochondrial matrix and respiratory complex protein phosphorylation.

It has become appreciated over the last several years that protein phosphorylation within the cardiac mitochondrial matrix and respiratory complexes is extensive. Given the importance of oxidative phosphorylation and the balance of energy metabolism in the heart, the potential regulatory effect of these classical signaling events on mitochondrial function is of interest. However, the functional...

Crystal Structure of Mitochondrial Respiratory Membrane Protein Complex II

The mitochondrial respiratory Complex II or succinate:ubiquinone oxidoreductase (SQR) is an integral membrane protein complex in both the tricarboxylic acid cycle and aerobic respiration. Here we report the first crystal structure of Complex II from porcine heart at 2.4 A resolution and its complex structure with inhibitors 3-nitropropionate and 2-thenoyltrifluoroacetone (TTFA) at 3.5 A resolut...

Phosphorylation of Dentin Matrix Protein

Cardiac myosin-binding protein-C phosphorylation and cardiac function.

The role of cardiac myosin binding protein-C (cMyBP-C) phosphorylation in cardiac physiology or pathophysiology is unclear. To investigate the status of cMyBP-C phosphorylation in vivo, we determined its phosphorylation state in stressed and unstressed mouse hearts. cMyBP-C phosphorylation is significantly decreased during the development of heart failure or pathologic hypertrophy. We then gene...

Mitochondrial myopathies: deficiencies localized to complex I and complex III of the mitochondrial respiratory chain.

Deficiencies of the mitochondrial respiratory chain or the phosphorylation system are becoming increasingly recognized causes of myopathy and multisystem disease in man. In biochemical terms, the ones most clearly defined have been associated with impaired activities of NADH : ubiquinone reductase (Morgan-Hughes el al., 1979, 1984; Land et al., 1981; Moreadith etal., 1984), ubiquino1:cytochrome...