Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:1.3.5.1 (succinate dehydrogenase)
 8,177 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A method is described for the preparation of outer and cytoplasmic membranes of Pseudomonas aeruginosa, and the outer membrane proteins characterized. Isolated outer and cytoplasmic membranes differed markedly in the content of 2-keto-3-deoxyoctonate (lipopolysaccharide) and phospholipid as well as in the localization of certain enzymes (NADH oxidase, succinate dehydrogenase, D-lactate dehydrogenase, malate dehydrogenase, and phospholipase), and also in the microscopic morphology. The outer membrane preparation showed activity neutralizing a certain bacteriocin or bacteriophages, whereas the cytoplasmic membrane preparation showed no neutralizing activity. The protein composition of membrane preparations from five different strains of P. aeruginosa [P14, M92 (PAO1), PAC1, P15, and M2008 (PAT)] were determined by sodium dodecyl sulfate (SDS)-polyacrylamide gel electrophoresis. More than 50 protein bands were detected in the cytoplasmic membrane preparation. The protein compositions of outer membranes from the five different strains were very similar: at least 6 major bands were found (apparent molecular weights: Band D, 50,000; band E, 45,000; band F, 33,000; bands G and H, 21,000; and band I, 8,000). The protein composition of outer membranes was affected by some physiological growth conditions. Some features of major outer membrane proteins were also studied. Band F showed anomalous migration on SDS polyacrylamide gel electrophoresis depending on the solubilizing conditions or pretreatment with TCA. Band I seemed to be a protein analogous to the lipoprotein which had been found in the outer membrane of Escherichia coli.
 ...
PMID:Separation and characterization of the outer membrane of Pseudomonas aeruginosa. 9 43

Yeast mutants deficient in the constitutive ADHI (adc 1) were used for the isolation of mutants with deficiencies of the intermediary carbon metabolism, and of mutants defective in carbon catabolite derepression. Mutants were recognized by their inability to grow on YEP-glycerol and/or on ethanol synthetic complete medium. They were either defective in isocitrate lyase (ic11), succinate dehydrogenase (sdh1), or malate dehydrogenase (mdh1, mdh2), mdh-mutants could not uniformely be appointed to one of the known MDH isozymes. Homozygous mdh and sdh1 diploids are unable to sporulate. Three gene loci could be identified by mutants pleiotropically defective in many or all of the enzymes tested In ccr 1 mutants, derepression of isocitrate lyase, fructose-1,6-diphosphatase, ADHII and possibly of the cytoplasmic MDH is prevented, whereas the mitochondrial TCA-cycle enzymes, succinate dehydrogenase and malate dehydrogenase, are not significantly affected. CCR2 and CCR3 have quite similar action spectra. Both genes are obviously necessary for derepression of all enzymes tested. It could be shown that ccr1, ccr2 and ccr3 mutants are not respiratory deficient.
 ...
PMID:Isolation and characterization of yeast mutants defective in intermediary carbon metabolism and in carbon catabolite derepression. 19 91

Adult mice, Mus booduga were fed orally with bennzenehexachloride (BHC) at a dose of 50 mg/kg body weight every day for 1, 5 and 15 days. Significant decrease in the pyruvate content was observed at all periods of treatment. In support of this increase in lactate content and lactate dehydrogenase (LDH) activity was noticed in all the three tissues. Enzymes of TCA cycle namely isocitrate dehydrogenase (ICDH), succinate dehydrogenase (SDH) and malate dehydrogenase (MDH) were inhibited suggesting abnormality in mitochondrial oxidative metabolism as a consequence of BHC toxicity.
 ...
PMID:Changes in the carbohydrate metabolism in the selected tissues of Mus booduga gray after BHC treatment. 172 96

Several key enzymes related to carbohydrate metabolism were assayed in Setaria digitata. In the cytosolic fraction pyruvate kinase, phosphoenolpyruvate carboxykinase, malate dehydrogenase, malic enzyme, aspartate transaminase and alanine transaminase were found. Among the TCA cycle enzymes succinate dehydrogenase, fumarate reductase, fumarase (malate dehydration), malate dehydrogenase (malate oxidation and oxaloacetate reduction) and malic enzyme (malate decarboxylation) were detected in the mitochondrial fraction. Only reduced nicotinamide adenine dinucleotide (NADH) dehydrogenase, NADH oxidase and NADH-cytochrome c reductase were found in the mitochondrial fraction. The significance of these results with respect to the metabolic capabilities of the worm are discussed.
 ...
PMID:Intermediary carbohydrate metabolism in the adult filarial worm Setaria digitata. 177 15

The possible physiological role of estrogen in the regulation of energy metabolism of epididymis and vas deferens of rhesus monkey was investigated. A few selected key enzymes of glycolysis (hexokinase, phosphofructokinase and pyruvate kinase) and TCA cycle (succinate dehydrogenase and malate dehydrogenase) were measured in these two organs of (a) castrated estrogen treated, (b) castrated estrogen + dihydrotestosterone (DHT) treated animals and compared with those in castrated and castrated + DHT treated animals. Results reveal that DHT stimulated the activities of all these enzymes whereas estrogen failed to stimulate any of the enzymes in castrated animals. However, estrogen in combination with DHT caused a marked stimulation of the enzymes and the response of the epididymis and vas deferens to combination treatment was significantly more than that caused by DHT alone. The results suggest that circulating estrogen in male has a physiological role and acts synergistically with androgen in regulating accessory sex organ function.
 ...
PMID:Androgen-estrogen synergy in the regulation of energy metabolism in epididymis and vas deferens of rhesus monkey. 181 87

Studies on the tricarboxylic acid cycle (TCA cycle) enzymes of Penetrocephalus ganapatii reveal that the TCA cycle is only partially operative, as some of the enzymes at the start of the cycle viz. citrate synthase, aconitase and isocitrate dehydrogenase are found to be low in their activities. The high activities of malate dehydrogenase and fumarase, showing affinity towards a reverse direction, indicate that the TCA cycle operates in the reverse direction resulting in the formation of fumarate. The low succinate dehydrogenase/fumarate reductase ratio suggests that ATP generation may occur at site I of the respiratory chain during the reduction of fumarate into succinate.
 ...
PMID:Tricarboxylic acid cycle enzymes of a pseudophyllid cestode Penetrocephalus ganapatii. 233 84

The intracellular distribution of enzymes of the TCA cycle was investigated in liver of rainbow trout. All enzymes of the cycle apart from succinyl thiokinase were detected. Citrate synthase, alpha-ketoglutarate dehydrogenase and succinate dehydrogenase were wholly mitochondrial. Fumarase, malate dehydrogenase, aconitase and NADP-isocitrate dehydrogenase were detected in both cytosol and mitochondria.
 ...
PMID:Intracellular distribution of tricarboxylic acid cycle enzymes in liver of rainbow trout Salmo gairdneri. 405 77

Histochemical studies on the activities of 3 beta-hydroxysteroid dehydrogenase (3 beta-HSD), succinate dehydrogenase (SDH) and cytochrome oxidase (CY-O) in rabbit ovarian follicles at various times after the administration of hCG were performed to investigate the relationship between the activities of steroid biosynthesis and the respiratory system. The activities of 3 beta-HSD and SDH were studied by using the tetrazolium salt and CY-O activities by the method of Seligman with prefixation. On the granulosa cell layer prior to the administration of hCG, no activities of 3 beta-HSD and CY-O were detectable, while slight activities of SDH were observed. These three enzymes showed intense activities on the granulosa cell layer 3 hours after the administration of hCG, which were maintained till the time of ovulation. The results indicated that increased activities of steroid biosynthesis in the granulosa cell layer after LH-surge were accompanied by the accelerated TCA cycle and respiratory chain. Energy from accelerated glycolysis may be utilized for steroid biosynthesis in preovulatory granulosa cells. Increased O2 consumption due to accelerated aerobic glycolysis is in accordance with hyperactivity of perifollicular capillaries, which finally leads to rapid follicular expansion and ovulation.
 ...
PMID:[A histochemical study of the respiratory system in rabbit ovarian follicles during ovulation]. 632 56

Histochemical studies have been made of the isocitrate dehydrogenase, succinic dehydrogenase, malate dehydrogenase, glutamate dehydrogenase, DPN diaphorase, TPN diaphorase, delta 5-3 beta-hydroxysteroid dehydrogenase and monoamine oxidase in the caput, corpus and cauda epididymides of normal and alpha chlorohydrin (6.5 mg/kg/9 days) treated rats. Administration of alpha chlorohydrin in a low dose caused a conspicuous decrease in all these enzymes except delta 5-3 beta-HSD, in various cell types of epididymal epithelium and sperms. Biochemical estimations of isocitrate dehydrogenase, succinic dehydrogenase, malate dehydrogenase and delta 5-3 beta-HSD have further supported and confirmed these histochemical observations. These changes in enzyme activities after treatment with low dose of alpha chlorohydrin strongly suggest that TCA cycle and amino acid metabolism of epididymis become defective, much earlier before any histological damage to the epididymis becomes visible.
 ...
PMID:Effects of low doses of alpha chlorohydrin on the dehydrogenases and oxidases of rat epididymal epithelium and sperms: a correlative histochemical and biochemical study. 694 44

The Sod2 gene for Mn-superoxide dismutase (MnSOD), an intramitochondrial free radical scavenging enzyme that is the first line of defense against superoxide produced as a byproduct of oxidative phosphorylation, was inactivated by homologous recombination. Homozygous mutant mice die within the first 10 days of life with a dilated cardiomyopathy, accumulation of lipid in liver and skeletal muscle, and metabolic acidosis. Cytochemical analysis revealed a severe reduction in succinate dehydrogenase (complex II) and aconitase (a TCA cycle enzyme) activities in the heart and, to a lesser extent, in other organs. These findings indicate that MnSOD is required for normal biological function of tissues by maintaining the integrity of mitochondrial enzymes susceptible to direct inactivation by superoxide.
 ...
PMID:Dilated cardiomyopathy and neonatal lethality in mutant mice lacking manganese superoxide dismutase. 749 16


1 2 3 4 5 6 7 8 9 10 Next >>