Cytochrome c oxidase-deficient patients have distinct subunit assembly profiles.
AuthorsHanson BJ, Carrozzo R, Piemonte F, Tessa A, Robinson BH, Capaldi RA
JournalJ Biol Chem
PubMed ID11278850
'Cytochrome c oxidase (COX) deficiency is the most common respiratory chain defect in childhood and is clinically heterogeneous. We report a study of six patients with COX deficiencies. Two of the patients had as yet undefined defects, three patients had Surf-1 mutations, and one patient had a 15-base pair deletion ... More
Endothelial cell surface F1-F0 ATP synthase is active in ATP synthesis and is inhibited by angiostatin.
AuthorsMoser TL, Kenan DJ, Ashley TA, Roy JA, Goodman MD, Misra UK, Cheek DJ, Pizzo SV
JournalProc Natl Acad Sci U S A
PubMed ID11381144
'Angiostatin blocks tumor angiogenesis in vivo, almost certainly through its demonstrated ability to block endothelial cell migration and proliferation. Although the mechanism of angiostatin action remains unknown, identification of F(1)-F(O) ATP synthase as the major angiostatin-binding site on the endothelial cell surface suggests that ATP metabolism may play a role ... More
4Pi microscopy of quantum dot-labeled cellular structures.
AuthorsMedda R, Jakobs S, Hell SW, Bewersdorf J,
JournalJ Struct Biol
PubMed ID17045487
'The most prominent restrictions of fluorescence microscopy are the limited resolution and the finite signal. Established conventional, confocal, and multiphoton microscopes resolve at best approximately 200nm in the focal plane and only 500nm in depth. Additionally, organic fluorophores and fluorescent proteins are bleached after 10(4)-10(5) excitation cycles. To overcome these ... More
Simultaneous red/green dual fluorescence detection on electroblots using BODIPY TR-X succinimidyl ester and ELF 39 phosphate.
AuthorsMartin K, Hart C, Schulenberg B, Jones L, Patton WF
JournalProteomics
PubMed ID11987124
'A two-color fluorescence detection method is described based upon covalently coupling the succinimidyl ester of BODIPY TR-X dye to proteins immobilized on polyvinylidene difluoride membranes, followed by detection of target proteins using the fluorogenic, precipitating substrate ELF 39-phosphate in combination with alkaline phosphatase conjugated reporter molecules. This results in all ... More
Calcineurin regulates skeletal muscle metabolism via coordinated changes in gene expression.
AuthorsLong YC, Glund S, Garcia-Roves PM, Zierath JR
JournalJ Biol Chem
PubMed ID17107952
'The metabolic property of skeletal muscle adapts in response to an increased physiological demand by altering substrate utilization and gene expression. The calcium-regulated serine/threonine protein phosphatase calcineurin has been implicated in the transduction of motor neuron signals to alter gene expression programs in skeletal muscle. We utilized transgenic mice that ... More
Chronic exposure to nitric oxide alters the free iron pool in endothelial cells: role of mitochondrial respiratory complexes and heat shock proteins.
AuthorsRamachandran A, Ceaser E, Darley-Usmar VM
JournalProc Natl Acad Sci U S A
PubMed ID14691259
'The mechanisms of nitric oxide (NO) signaling include binding to the iron centers in soluble guanylate cyclase and cytochrome c oxidase and posttranslational modification of proteins by S-nitrosation. Low levels of NO control mitochondrial number in cells, but little is known of the impact of chronic exposure to high levels ... More
Characterization of peroxisomal Pex5p from rat liver. Pex5p in the Pex5p-Pex14p membrane complex is a transmembrane protein.
AuthorsGouveia AM, Reguenga C, Oliveira ME, Sa-Miranda C, Azevedo JE
JournalJ Biol Chem
PubMed ID10889202
Pex5p is the receptor for the vast majority of peroxisomal matrix proteins. Here, we show that about 15% of rat liver Pex5p is found in the peroxisomal fraction representing 0.06% of total peroxisomal protein. This population of Pex5p displays all the characteristics of an intrinsic membrane protein. Protease protection assays ... More
Dysregulation of mitochondrial biogenesis in vascular endothelial and smooth muscle cells of aged rats.
AuthorsUngvari Z, Labinskyy N, Gupte S, Chander PN, Edwards JG, Csiszar A,
JournalAm J Physiol Heart Circ Physiol
PubMed ID18326800
Mitochondrial biogenesis is involved in the control of cell metabolism, signal transduction, and regulation of mitochondrial reactive oxygen species (ROS) production. Despite the central role of mitochondria in cellular aging and endothelial physiology, there are no studies extant investigating age-related alterations in mitochondrial biogenesis in blood vessels. Electronmicroscopy and confocal ... More
Resveratrol induces mitochondrial biogenesis in endothelial cells.
AuthorsCsiszar A, Labinskyy N, Pinto JT, Ballabh P, Zhang H, Losonczy G, Pearson K, de Cabo R, Pacher P, Zhang C, Ungvari Z,
JournalAm J Physiol Heart Circ Physiol
PubMed ID19429820
Pathways that regulate mitochondrial biogenesis are potential therapeutic targets for the amelioration of endothelial dysfunction and vascular disease. Resveratrol was shown to impact mitochondrial function in skeletal muscle and the liver, but its role in mitochondrial biogenesis in endothelial cells remains poorly defined. The present study determined whether resveratrol induces ... More
Human complex I defects can be resolved by monoclonal antibody analysis into distinct subunit assembly patterns.
AuthorsTriepels RH, Hanson BJ, van den Heuvel LP, Sundell L, Marusich MF, Smeitink JA, Capaldi RA
JournalJ Biol Chem
PubMed ID11112787
Complex I defects are one of the most frequent causes of mitochondrial respiratory chain disorders. Therefore, it is important to find new approaches for detecting and characterizing Complex I deficiencies. In this paper, we introduce a new set of monoclonal antibodies that react with 39-, 30-, 20-, 18-, 15-, and ... More
JNK antagonizes Akt-mediated survival signals by phosphorylating 14-3-3.
AuthorsSunayama J, Tsuruta F, Masuyama N, Gotoh Y
JournalJ Cell Biol
PubMed ID16009721
Life and death decisions are made by integrating a variety of apoptotic and survival signals in mammalian cells. Therefore, there is likely to be a common mechanism that integrates multiple signals adjudicating between the alternatives. In this study, we propose that 14-3-3 represents such an integration point. Several proapoptotic proteins ... More