Tricarboxylic acid

Calmodulin (CaM) is an important calcium sensor protein that transduces Ca2+ signals in plant stress signaling pathways. A previous study has revealed that transgenic rice over-expressing the calmodulin gene OsCam1–1 (LOC_Os03g20370) is more tolerant to salt stress than wild type.

23p vishikamaru2711 29-04-2020 13 1   Download

Modelling of the fluxes in central metabolism can be performed by combining labelling experiments with metabolite balancing. Using this approach, multiple samples from a cultivation of Saccharomyces cerevisiae in metabolic and isotopic steady state were analysed, and the metabolic fluxes in central metabolism were estimated. In the various samples, the estimates of the central metabolic pathways, the tricarboxylic acid cycle, the oxidative pentose phosphate pathway and the anaplerotic pathway, showed an unprecedented reproducibility....

6p system191 01-06-2013 41 2   Download

The prokaryotic ATP-citrate lyase is considered to be a key enzyme of the carbon dioxide-fixing reductive tricarboxylic acid (RTCA) cycle. Kinetic examination of the ATP-citrate lyase from the green sulfur bacterium Chlorobium limicola (Cl-ACL), an a4b4 heteromeric enzyme, revealed that the enzyme displayed typical Michaelis-Menten kinetics toward ATP with an apparent Km value of 0.21 ± 0.04 mM. However, strong negative cooperativity was observed with respect to citrate binding, with a Hill coefficient (nH) of 0.45. ...

8p research12 01-06-2013 40 4   Download

The citric acid or tricarboxylic acid cycle is a central element of higher-plant carbon metabolism which provides, among other things, electrons for oxidative phosphorylation in the inner mitochondrial membrane, intermediates for aminoacid biosynthesis, and oxaloacetate for gluconeogenesis from succinate derived from fatty acids via the glyoxylate cycle in glyoxysomes. The tricarboxylic acid cycle is a typical mitochondrial pathway and is widespread among a-proteobacteria, the group of eubacteria as de®ned under rRNA systematics from which mitochondria arose. ...

16p research12 01-06-2013 41 3   Download

Isocitrate dehydrogenase (IDH) catalyzes the reversible conversion between isocitrate and 2-oxoglutarate accom-panied by decarboxylation/carboxylation and oxidoreduc-tion of NAD(P) + cofactor.While this enzyme has beenwell studiedas a catabolic enzyme in the tricarboxylicacid (TCA) cycle, here we have characterized NADP-dependent IDH fromChlorobiumlimicola, agreen sulfur bacteriumthat ®xes CO2 through the reductive tricarboxylic acid (RTCA) cycle, focusing on theCO2-®xation ability of the enzyme. ...

6p research12 23-04-2013 45 3   Download

The pathway of the oxidation of propionate to pyruvate in Escherichia coliinvolves five enzymes, only two of which, methylcitrate synthase and 2-methylisocitrate lyase, have been thoroughly characterized. Here we report that the isomerization of (2S,3S)-methylcitrate to (2R,3S)-2-methyl-isocitrate requires anovel enzyme,methylcitratedehydratase (PrpD), and the well-known enzyme, aconitase (AcnB), of the tricarboxylic acid cycle.

11p tumor12 22-04-2013 47 3   Download

The pyruvate dehydrogenase complex (PDC) is subjected to multiple interacting levels of control in plant cells. The first level is subcellular compartmentation. Plant cells are unique inhaving twodistinct, spatially separated forms of the PDC; mitochondrial (mtPDC) and plastidial (plPDC). The mtPDCis the site of carbon entry into the tricarboxylic acid cycle, while the plPDCprovides acetyl-CoAandNADHfor de novofatty acid biosynthesis.

7p tumor12 20-04-2013 30 2   Download

Erythrocytic stages of the malaria parasitePlasmodium fal-ciparumrely on glycolysis for their energy supply and it is unclear whether they obtain energy via mitochondrial res-piration albeit enzymes of the tricarboxylic acid (TCA) cycle appear to be expressed in these parasite stages. Isocitrate dehydrogenase (ICDH) is either an integral part of the mitochondrial TCA cycle or is involved in providing NADPH for reductive reactions in the cell.

9p fptmusic 16-04-2013 55 2   Download

Pyruvate: ferredoxin oxidoreductase (POR; EC 1.2.7.1) catalyzes the thia-mine pyrophosphate-dependent oxidative decarboxylation of pyruvate to form acetyl-CoA and CO2 . The thermophilic, obligate chemolithoauto-trophic hydrogen-oxidizing bacterium, Hydrogenobacter thermophilusTK-6, assimilates CO2 via the reductive tricarboxylic acid cycle.

10p mobifone23 18-01-2013 50 5   Download

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học quốc tế cung cấp cho các bạn kiến thức về ngành y đề tài: Kinetic modeling of tricarboxylic acid cycle and glyoxylate bypass in Mycobacterium tuberculosis, and its application to assessment of drug targets

11p toshiba17 31-10-2011 66 3   Download

Acid citric ngậm một phân tử nước là acid 2-hydroxypropan-1,2,3-tricarboxylic, phải chứa từ 99,5 đến 101,0% C6H8O7, tính theo chế phẩm khan. Tính chất Bột kết tinh trắng hoặc tinh thể hay dạng hạt không màu. Lên hoa. Rất dễ tan trong nước, dễ tan trong ethanol 96%, hơi tan trong ether.

6p truongthiuyen17 19-07-2011 116 10   Download