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1
Application of reverse-phase HPLC to quantify oligopeptide acetylation eliminates interference from unspecific acetyl CoA hydrolysis
2009-08-04

Protein acetylation is a common modification that plays a central role in several cellular processes. The most widely used methods to study these modifications are either based on the detection of radioactively acetylated oligopetide products or an enzyme-coupled reaction measuring conversion of the acetyl donor ...

PubMed Central

2
3-Hydroxy-3-methylglutaryl-coenzyme A synthase from ox liver. Properties of its acetyl derivative.
1985-04-15

Ox liver mitochondrial 3-hydroxy-3-methylglutaryl-CoA synthase (EC 4.1.3.5) reacts with acetyl-CoA to form a complex in which the acetyl group is covalently bound to the enzyme. This acetyl group can be removed by addition of acetoacetyl-CoA or CoA. The extent of acetylation and release of ...

PubMed Central

3
Mitochondrial storage form of acetyl CoA carboxylase in fasted and alloxan diabetic rats
1986-05-01

Sodium dodecyl sulfate-denatured biotinyl proteins will bind (/sup 14/C)methyl avidin which remains bound through polyacrylamide gel electrophoresis. The method has been used to demonstrate the presence of two high molecular weight subunit forms of acetyl CoA carboxylase in rat liver cytoplasm, both of which are precipitated by antibody to purifed rat ...

Energy Citations Database

4
FUNCTION OF CARNITINE IN THE FATTY ACID OXIDASE ...
1967-01-01

... of acetylcarnitine from acetyl coenzyme A (CoA ... ACIDS, OXIDATION), (*MUSCLES, ENZYMES), TRANSFERASES, COENZYMES, DIPTERA, FLIGHT ...

DTIC Science & Technology

5
Biotechnology Consultation Memorandum of Conference BNF ...

... in nature in microbes, plants, and animals, have a common enzymatic function (transfer of an acetyl group from acetyl CoA to a substrate) but differ ...

Center for Food Safety and Applied Nutrition (CFSAN)

6
Summary of Summer Activities Christian L. Omidiran, Jason Ou

+ ATP + CoA (7) AcetylCoA + 2NADH Ethanol + CoA + 2NAD+ (8) Isocitrate Glyoxalate + Succinate (9) AcetylCoA + Glyoxalate Malate + CoA (10) OAA + NADH Malate + NAD+ (11) Malate Fumarate (12) Fumarate

E-print Network

7
Crystal structure of the complex between 4-hydroxybutyrate CoA-transferase from Clostridium aminobutyricum and CoA.
2011-08-11

Clostridium aminobutyricum ferments 4-aminobutyrate (?-aminobutyrate, GABA) to ammonia, acetate and butyrate via 4-hydroxybutyrate that is activated to the CoA-thioester catalyzed by 4-hydroxybutyrate CoA-transferase. Then, 4-hydroxybutyryl-CoA is dehydrated to crotonyl-CoA, which disproportionates to butyryl-CoA and acetyl-CoA. Cocrystallization of the CoA-transferase with ...

PubMed

8
Funding Opportunities ? NAI ? NASA ... - Astrobiology - NASA

Sep 5, 2011 ... Title: Minerals to Enzymes: The Path to CO Dehydrogenase/Acetyl CoA ... prokaryotes originated as the result of an endosymbiosis between ...

NASA Website

9
Mechanism of the Biological Conversion of Citric Acid. 6: Citrate-Synthase Is an Acetyl-Coa Enolase.
1984-01-01

The enolization of acetyl coenzyme A is demonstrated by means of isotope experiments. It requires citrate-synthase and an inductor, (S)-malate. The mechanism of the biosynthesis of citrate and the results of the experiments are in agreement with the sugge...

National Technical Information Service (NTIS)

10
Identification of a Johnsongrass (Sorghum halepense) Biotype Resistant to ACCase-Inhibiting Herbicides in Northern ...

... cross-resistance to cycloxydim, propaquizafop, and fluazifop (acetyl coenzyme A [CoA] carboxylase [ACCase]-inhibiting herbicides), and multiple ... 318. BioOneDélye, C. 2005. Weed resistance to acetyl coe...

NBII National Biological Information Infrastructure

11
Differential sensitivity of Italian ryegrass (Lolium multiflorum) cultivars to fenoxaprop

... differed slightly in the specific activity of acetyl�coenzyme A carboxylase (ACCase) (EC 6.4.1.2) ... compounds are potent inhibitors of the enzyme acetyl�coenzyme A (CoA) carboxylase (ACCase) (Gronwald 1...

NBII National Biological Information Infrastructure

12
Structure of the Escherichia coli malate synthase G:pyruvate:acetyl-coenzyme A abortive ternary complex at 1.95 � resolution
2003-09-01

Malate synthase, an enzyme of the glyoxylate pathway, catalyzes the condensation and subsequent hydrolysis of acetyl-coenzyme A (acetyl-CoA) and glyoxylate to form malate and CoA. In the present study, we present the 1.95 Ŗresolution crystal structure of Escherichia coli malate synthase isoform G in complex with ...

PubMed Central

13
Acetyl coenzyme A synthetase catalyzed reactions of coenzyme A with. cap alpha. -. beta. -unsaturated carboxylic acids
1988-05-01

..cap alpha..,..beta..-Unsaturated coenzyme A(CoA) thioesters including acrylyl CoA, methacrylyl CoA, and propiolyl CoA were synthesized by catalysis with acetyl CoA synthetase. After isolation from the enzymatic reactions, the products were found to be the result of 1,4 addition of CoASH to ...

Energy Citations Database

14
Modification of bovine kidney pyruvate dehydrogenase kinase activity by CoA esters and their mechanism of action
1985-08-25

The activation of pyruvate dehydrogenasea kinase activity by CoA esters has been further characterized. Half-maximal activation of kinase activity was achieved with about 1.0 microM acetyl-CoA after a 20-s preincubation in the presence of NADH. More than 80% of the acetyl-CoA was consumed during this period in ...

Energy Citations Database

15
Cross Resistance of Acetyl-coa Carboxylase (ACCase) Inhibitor�Resistant Wild Oat (Avena fatua) Biotypes in the Pacific ...

... Acetyl-coa Carboxylase (ACCase) Inhibitor�Resistant Wild Oat (Avena fatua) Biotypes in the Pacific NorthwestAhmet Uludag, Kee Woong ... diclofop, fenoxaprop, pinoxaden, quizalofop, sethoxydim, tralkoxydim...

NBII National Biological Information Infrastructure

16
Protein acyltransferase function of purified calreticulin: the exclusive role of P-domain in mediating protein acylation utilizing acyloxycoumarins and acetyl CoA as the acyl group donors.
2011-05-01

The distinct biochemical function of endoplasmic reticulum (ER) protein Calreticulin (CR) catalyzing the transfer of acyl group from acyloxycoumarin to a receptor protein was termed calreticulin transacylase (CRTAase). The present study, unlike the previous reports of others utilizing CR-deficient cells alone, dealt with the recombinant CR domains of Heamonchus contortus (rhCRTAase) in order to ...

PubMed

17
Pulse-chase studies of the synthesis of acetyl-CoA by carbon monoxide dehydrogenase/acetyl-CoA synthase: evidence for a random mechanism of methyl and carbonyl addition.
2008-01-18

Carbon monoxide dehydrogenase/acetyl-CoA synthase catalyzes acetyl-CoA synthesis from CO, CoA, and a methylated corrinoid iron-sulfur protein, which acts as a methyl donor. This reaction is the last step in the Wood-Ljungdahl pathway of anaerobic carbon fixation. The binding sequence for the three substrates has been debated for over a ...

PubMed

18
Pulse-Chase Studies of the Synthesis of Acetyl-CoA by Carbon Monoxide Dehydrogenase/Acetyl-CoA Synthase
2008-03-28

Carbon monoxide dehydrogenase/acetyl-CoA synthase catalyzes acetyl-CoA synthesis from CO, CoA, and a methylated corrinoid iron-sulfur protein, which acts as a methyl donor. This reaction is the last step in the Wood-Ljungdahl pathway of anaerobic carbon fixation. The binding sequence for the three ...

PubMed Central

19
Targeting intermediary metabolism in the hypothalamus as a mechanism to regulate appetite.
2010-04-14

The central nervous system mediates energy balance (energy intake and energy expenditure) in the body; the hypothalamus has a key role in this process. Recent evidence has demonstrated an important role for hypothalamic malonyl CoA in mediating energy balance. Malonyl CoA is generated by the carboxylation of acetyl ...

PubMed

20
Substrate Binding and Catalytic Mechanism of Human Choline Acetyltransferase
2006-01-01

Choline acetyltransferase (ChAT) catalyzes the synthesis of the neurotransmitter acetylcholine from choline and acetyl-CoA, and its presence is a defining feature of cholinergic neurons. We report the structure of human ChAT to a resolution of 2.2 {angstrom} along with structures for binary complexes of ChAT with choline, CoA, and a nonhydrolyzable ...

Energy Citations Database

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21
Enhanced isoamyl acetate production upon manipulation of the acetyl-CoA node in Escherichia coli.

Coenzyme A (CoA) and its thioester derivative acetyl-Coenzyme A (acetyl-CoA) participate in over 100 different reactions in intermediary metabolism of microorganisms. Earlier results indicated that overexpression of upstream rate-limiting enzyme pantothenate kinase with simultaneous supplementation of precursor pantothenic acid to the ...

PubMed

22
Dilute acid hydrolysis of paper birch : kinetics studies of xylan ...

Jun 16, 2011 ... Description: Batch hydrolysis kinetics of paper birch (Betula papyrifera) xylan and its associated acetyl groups in dilute sulfuric acid ...

Treesearch

23
The Amidase Activity of Acetyl- and Butylryl-Cholinesterases.
1973-01-01

The report describes the hydrolysis of amides by acetyl- and butyryl-cholinesterases. The structure-activity pattern is quite different from that of the more conventional carboxylic ester substrates. Thus, quaternary amides resist hydrolysis. All of the a...

National Technical Information Service (NTIS)

24
The antibiotic activity of N-pentylpantothenamide results from its conversion to ethyldethia-coenzyme a, a coenzyme a antimetabolite.
2002-10-07

Pantothenic acid (vitamin B(5)) is the natural precursor of coenzyme A (CoA), an essential cofactor in all organisms. The pantothenic acid antimetabolite N-pentylpantothenamide inhibits the growth of Escherichia coli with a minimum inhibitory concentration of 2 microm. In this study, we examine the mechanism of this inhibition. Using the last five enzymes of the ...

PubMed

25
The Metabolites of Fentanyl and Its Derivatives. Part 2.
1993-01-01

... It is noteworthy that further biotransformation along this route via hydrolysis of the anilide and N- acetylation produced acetaminophen, 7, a common ...

DTIC Science & Technology

26
Stimulation of CoA biosynthesis by P-aminobenzoate and benzoate in cultured rat hepatocytes
1987-05-01

The effects of paraminobenzoate (PABA) and benzoate (BA) on CoA metabolism were studied in intact hepatocytes to elucidate the role of CoASH and acetyl-CoA in the regulation of CoA biosynthesis. CoASH and acetyl-CoA inhibit isolated pantothenate kinase, a cytosolic enzyme. PABA is N-acetylated ...

Energy Citations Database

27
Effect of alterations of the specific activity of the intracellular acetyl CoA pool on apparent rates of hepatic cholesterogenesis.
1974-09-01

We have previously shown significant dilution of the specific activity of the intracellular acetyl CoA pool when radiolabeled acetate is used as the precursor in liver slice experiments. In the present study, using liver from animals subjected to various manipulations known to alter the rate of cholesterogenesis, the specific activity of the ...

PubMed

28
The Apparent Malate Synthase Activity of Rhodobacter sphaeroides Is Due to Two Paralogous Enzymes, (3S)-Malyl-Coenzyme A (CoA)/?-Methylmalyl-CoA Lyase and (3S)- Malyl-CoA Thioesterase?
2010-03-04

Assimilation of acetyl coenzyme A (acetyl-CoA) is an essential process in many bacteria that proceeds via the glyoxylate cycle or the ethylmalonyl-CoA pathway. In both assimilation strategies, one of the final products is malate that is formed by the condensation of acetyl-CoA with glyoxylate. In the glyoxylate cycle this reaction is ...

PubMed Central

29
Contrasting Patterns of Evolutionary Divergence Within the Acinetobacter Calcoaceticus pca Operon.
1994-01-01

The six enzymes required for catabolism of protocatechuate to succinate and acetyl CoA are encoded by pca genes in Gm- bacterium Acinetobacter calcoaceticus. The clustered A. calcoaceticus cat genes encode an analogous set of enzymes associated with the m...

National Technical Information Service (NTIS)

30
Probing the allosteric activation of pyruvate carboxylase using 2',3'-O-(2,4,6-trinitrophenyl) adenosine 5'-triphosphate as a fluorescent mimic of the allosteric activator acetyl CoA.
2011-03-21

2',3'-O-(2,4,6-Trinitrophenyl) adenosine 5'-triphosphate (TNP-ATP) is a fluorescent analogue of ATP. MgTNP-ATP was found to be an allosteric activator of pyruvate carboxylase that exhibits competition with acetyl CoA in activating the enzyme. There is no evidence that MgTNP-ATP binds to the MgATP substrate binding site of the enzyme. At concentrations ...

PubMed

31
Lactate reduction in Clostridium propionicum: isolation and characterization of lactyl CoA dehydratase
1986-01-01

Reduction of lactate to propionate by Clostridium propionicum proceeds via acrylate. In cell free extracts, lactate and acrylate are reduced to propionate and acrylate is hydrated to lactate. At no time, however, was acrylate derived from lactate detected, even when acrylate reduction was abolished. Two proteins, E1 and E2, were purified to > 90% homogeneity. Together, they catalyze the ...

Energy Citations Database

32
Fatty Acid Biosynthesis in Human Leukocytes*
1967-10-01

Extracts from human leukocytes have been examined for the enzymes of de novo fatty acid biosynthesis. These extracts do not catalyze the synthesis of long-chain fatty acids because they lack acetyl CoA carboxylase, the first enzyme unique to the fatty acid synthesis pathway.Since these cells cannot form malonyl CoA, they are unable to ...

PubMed Central

33
Demonstration of carbon-carbon bond cleavage of acetyl coenzyme A by using isotopic exchange catalyzed by the CO dehydrogenase complex from acetate-grown Methanosarcina thermophila.
1991-01-01

The purified nickel-containing CO dehydrogenase complex isolated from methanogenic Methanosarcina thermophila grown on acetate is able to catalyze the exchange of [1-14C] acetyl-coenzyme A (CoA) (carbonyl group) with 12CO as well as the exchange of [3'-32P]CoA with acetyl-CoA. Kinetic parameters for the carbonyl exchange have been ...

PubMed Central

34
Demonstration of carbon-carbon bond cleavage of acetyl coenzyme A by using isotopic exchange catalyzed by the CO dehydrogenase complex from acetate-grown Methanosarcina thermophila.
1991-01-01

The purified nickel-containing CO dehydrogenase complex isolated from methanogenic Methanosarcina thermophila grown on acetate is able to catalyze the exchange of [1-14C] acetyl-coenzyme A (CoA) (carbonyl group) with 12CO as well as the exchange of [3'-32P]CoA with acetyl-CoA. Kinetic parameters for the carbonyl exchange have been ...

PubMed

35
Life with CO or CO2 and H2 as a source of carbon and energy.
1991-02-01

An account is presented of the recent discovery of a pathway of growth by bacteria in which CO or CO2 and H2 are sources of carbon and energy. The Calvin cycle and subsequently other cycles were discovered in the 1950s, and in each the initial reaction of CO2 involved adding CO2 to an organic compound formed during the cyclic pathway (for example, CO2 and ribulose diphosphate). Studies were ...

PubMed

36
Dilute acid hydrolysis of paper birch: kinetics studies of xylan and acetyl-group hydrolysis.
1985-03-01

Batch hydrolysis kinetics of paper birch (Betula papyrifera) xylan and its associated acetyl groups in dilute sulfuric acid have been measured for acid concentrations of between 0.04 and 0.18M and temperatures of between 100 and 170 degrees C. Only 5% of the cellulose was hydrolyzed for up to 85% xylan removal. Rate data were correlated well by a parallel ...

PubMed

37
Interaction of analogues of coenzyme A with choline acetyltransferase.
1977-05-01

The finding that methyl methanethiolsulfonate appears to inhibit choline acetyltransferase from squid ganglia not by reacting with a thiol group of the enzyme but by reacting with the thiol group of coenzyme A to form a competitive inhibitor of acetyl coenzyme A led to the synthesis of the ethyl, propyl, and 3-carboxy-4-nitrophenyl disulfides of CoA. The ...

PubMed

38
Isolated poly(3-hydroxybutyrate) (PHB) granules are complex bacterial organelles catalyzing formation of PHB from acetyl coenzyme A (CoA) and degradation of PHB to acetyl-CoA.
2007-08-24

Poly(3-hydroxybutyrate) (PHB) granules isolated in native form (nPHB granules) from Ralstonia eutropha catalyzed formation of PHB from (14)C-labeled acetyl coenzyme A (CoA) in the presence of NADPH and concomitantly released CoA, revealing that PHB biosynthetic proteins (acetoacetyl-CoA thiolase, acetoacetyl-CoA reductase, and PHB ...

PubMed

39
Synthesis of acetyl coenzyme A by carbon monoxide dehydrogenase complex from acetate-grown Methanosarcina thermophila.
1990-12-01

The carbon monoxide dehydrogenase (CODH) complex from Methanosarcina thermophila catalyzed the synthesis of acetyl coenzyme A (acetyl-CoA) from CH3I, CO, and coenzyme A (CoA) at a rate of 65 nmol/min/mg at 55 degrees C. The reaction ended after 5 min with the synthesis of 52 nmol of acetyl-CoA per nmol of CODH ...

PubMed Central

40
Synthesis of acetyl coenzyme A by carbon monoxide dehydrogenase complex from acetate-grown Methanosarcina thermophila.
1990-12-01

The carbon monoxide dehydrogenase (CODH) complex from Methanosarcina thermophila catalyzed the synthesis of acetyl coenzyme A (acetyl-CoA) from CH3I, CO, and coenzyme A (CoA) at a rate of 65 nmol/min/mg at 55 degrees C. The reaction ended after 5 min with the synthesis of 52 nmol of acetyl-CoA per nmol of CODH ...

PubMed

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41
The effect of alterations in total coenzyme A on metabolic pathways in the liver and heart
1989-01-01

The first set of experiments involved in vitro experiments using primary cultures of rat hepatocytes. A range of conditions were developed which resulted in cell cultures with variations in total CoA over a range of 1.3 to 2.9 nmol/mg protein with identical hormonal activation which simulated metabolic stress. Elevations of total CoA levels above that of ...

Energy Citations Database

42
Intracellular acetyl unit transport in fungal carbon metabolism.
2010-10-01

Acetyl coenzyme A (acetyl-CoA) is a central metabolite in carbon and energy metabolism. Because of its amphiphilic nature and bulkiness, acetyl-CoA cannot readily traverse biological membranes. In fungi, two systems for acetyl unit transport have been identified: a shuttle dependent on the carrier carnitine and a ...

PubMed

43
Intracellular Acetyl Unit Transport in Fungal Carbon Metabolism ?
2010-12-01

Acetyl coenzyme A (acetyl-CoA) is a central metabolite in carbon and energy metabolism. Because of its amphiphilic nature and bulkiness, acetyl-CoA cannot readily traverse biological membranes. In fungi, two systems for acetyl unit transport have been identified: a shuttle dependent on the carrier carnitine and a ...

PubMed Central

44
METHOD FOR PREPARING NORMORPHINE
1959-06-01

An improved method is presented for producing normorphine from morphine. Morphine as the starting material is acetylated by treatment with acetylating agents to produce di-acetyl morphine (heroin). The acetylated compound is reacted with cyanating agents to produce ...

Energy Citations Database

45
[Effect of hyperbaric oxygenation on N-acetyl-L-asparaginic acid metabolism in different cerebral areas].

The content of N-acetyl-l-asparaginic acid, CoA, CoASAc and the N-acetylaspartate amunohydrolase activity was determined in cerebral areas of rats at the normal level and at different stages of oxygen poisoning. At the preconvulsive stage of the oxygen poisoning the content of N-acetyl-l-asparaginic acid decreases in cerebral ...

PubMed

46
Molecular cloning, characterization, and elicitation of acetyl-CoA carboxylase from alfalfa.
1994-05-10

Acetyl-CoA carboxylase [ACCase; acetyl-CoA:carbon-dioxide ligase (ADP-forming), EC 6.4.1.2] catalyzes the ATP-dependent carboxylation of acetyl CoA to produce malonyl CoA. In plants, malonyl CoA is needed for plastid localized fatty acid biosynthesis and for a variety of ...

PubMed Central

47
Probing in Vivo Metabolism by Stable Isotope Labeling of Storage Lipids and Proteins in Developing Brassica napus Embryos1
2002-09-01

Developing embryos of Brassica napus accumulate both triacylglycerols and proteins as major storage reserves. To evaluate metabolic fluxes during embryo development, we have established conditions for stable isotope labeling of cultured embryos under steady-state conditions. Sucrose supplied via the endosperm is considered to be the main carbon and energy source for seed metabolism. However, in ...

PubMed Central

48
Effect of (L-Carnitine) on acetyl-L-carnitine production by heart mitochondria
1986-05-01

The authors recently reported a large efflux of acetyl-L-carnitine from rat heart mitochondria during state 3 respiration with pyruvate as substrate both in the presence and absence of malate. In this series of experiments, the effect of the concentration of L-carnitine on the efflux of acetyl-L-carnitine and on the production of /sup 14/CO/sub 2/ from ...

Energy Citations Database

49
Levels of acetyl coenzyme A, reduced and oxidized coenzyme A, and coenzyme A in disulfide linkage to protein in dormant and germinated spores and growing and sporulating cells of Bacillus megaterium.
1977-11-01

Dormant spores of Bacillus megaterium were found to contain approximately 850 pmol of coenzyme A (CoA) per milligram of dry weight. Of this total, less than 1.5% was acetyl-CoA, 25% was CoA-disulfide, 43% was in disulfide linkage to protein, and the remainder was the free thiol. Dormand spores of Bacillus cereus and Clostridium bifermentans contained 700 ...

PubMed Central

50
Process for the Production of 5'-Deoxy-5-( Exp 18 F)Fluorouridine.
1983-01-01

Process for the production of 5'-deoxy-5-fluorouridine and the corresponding exp 18 F compound by the reaction of fluorine or acetyl hypofluorite with 2', 3'-di-O-acetyl-5'-deoxyuridine followed by hydrolysis. (ERA citation 09:026563)

National Technical Information Service (NTIS)

51
Immobilization of lysozyme on cotton fabrics; synthesis, characterication, and activity

The antimicrobial activity of lysozyme derives from the hydrolysis of the bacterial cell wall polysaccharide at the glycosidic bond that links N-acetyl-glucosamine and N-acetyl-muramic acid. Maintaining the activity of lysozyme while bound to a cellulose substrate is a goal toward developing enzyme...

Technology Transfer Automated Retrieval System (TEKTRAN)

52
The missing link in linear alkylbenzenesulfonate surfactant degradation: 4-sulfoacetophenone as a transient intermediate in the degradation of 3-(4-sulfophenyl)butyrate by Comamonas testosteroni KF-1.
2009-11-13

Biodegradation of the laundry surfactant linear alkylbenzenesulfonate (LAS) involves complex bacterial communities. The known heterotrophic community has two tiers. First, all LAS congeners are oxygenated and oxidized to about 50 sulfophenylcarboxylates (SPC). Second, the SPCs are mineralized. Comamonas testosteroni KF-1 mineralizes 3-(4-sulfophenyl)butyrate (3-C4-SPC). During growth of strain ...

PubMed

53
The Missing Link in Linear Alkylbenzenesulfonate Surfactant Degradation: 4-Sulfoacetophenone as a Transient Intermediate in the Degradation of 3-(4-Sulfophenyl)Butyrate by Comamonas testosteroni KF-1?
2010-01-13

Biodegradation of the laundry surfactant linear alkylbenzenesulfonate (LAS) involves complex bacterial communities. The known heterotrophic community has two tiers. First, all LAS congeners are oxygenated and oxidized to about 50 sulfophenylcarboxylates (SPC). Second, the SPCs are mineralized. Comamonas testosteroni KF-1 mineralizes 3-(4-sulfophenyl)butyrate (3-C4-SPC). During growth of strain ...

PubMed Central

54
Synthesis of radiolabeled acetyl-coenzyme A from sodium acetate
1989-01-01

The synthesis of high specific radioactivity (/sup 14/C)-acetyl-Coenzyme A from (/sup 14/C)sodium acetate, 2,6-dichlorobenzoic acid, 1,1'-carbonyldiimidazole, and CoA is reported. Starting with 1 mumol of (/sup 14/C)sodium acetate, this method yields pure (/sup 14/C)acetyl-CoA in yields approaching 40%. Chromatography on a ...

Energy Citations Database

55
Identification of a novel CoA synthase isoform, which is primarily expressed in Brain
2006-03-24

CoA and its derivatives Acetyl-CoA and Acyl-CoA are important players in cellular metabolism and signal transduction. CoA synthase is a bifunctional enzyme which mediates the final stages of CoA biosynthesis. In previous studies, we have reported molecular cloning, biochemical characterization, and subcellular ...

Energy Citations Database

56
Identifying the missing steps of the autotrophic 3-hydroxypropionate CO2 fixation cycle in Chloroflexus aurantiacus.
2009-12-02

The phototrophic bacterium Chloroflexus aurantiacus uses a yet unsolved 3-hydroxypropionate cycle for autotrophic CO(2) fixation. It starts from acetyl-CoA, with acetyl-CoA and propionyl-CoA carboxylases acting as carboxylating enzymes. In a first cycle, (S)-malyl-CoA is formed from acetyl-CoA and 2 molecules of bicarbonate. ...

PubMed

57
Identifying the missing steps of the autotrophic 3-hydroxypropionate CO2 fixation cycle in Chloroflexus aurantiacus
2009-12-15

The phototrophic bacterium Chloroflexus aurantiacus uses a yet unsolved 3-hydroxypropionate cycle for autotrophic CO2 fixation. It starts from acetyl-CoA, with acetyl-CoA and propionyl-CoA carboxylases acting as carboxylating enzymes. In a first cycle, (S)-malyl-CoA is formed from acetyl-CoA and 2 molecules of ...

PubMed Central

58
The Fasted/Fed Mouse Metabolic Acetylome: N6-Acetylation Differences Suggest Acetylation Coordinates Organ-Specific Fuel Switching.
2011-08-16

The elucidation of extra-nuclear lysine acetylation has been of growing interest, as the cosubstrate for acetylation, acetyl CoA, is at a key metabolic intersection. Our hypothesis was that mitochondrial and cytoplasmic protein acetylation may be part of a fasted/re-fed feedback control system ...

PubMed

59
Applicability of CoA/acetyl-CoA manipulation system to enhance isoamyl acetate production in Escherichia coli.
2004-10-01

Coenzyme A (CoA) and its thioester derivatives are important precursor molecules for many industrially useful compounds such as esters, PHBs, lycopene and polyketides. Previously, in our lab we could increase the intracellular levels of CoA and acetyl-Coenzyme A (acetyl-CoA) by overexpressing one of the upstream ...

PubMed

60
Lipogenesis in the developing brain from intracranially administered (1-/sup 14/C) acetate and (U--/sup 14/C) glucose
1977-01-01

Fifteen-day-old rats divided into two groups were fiven (1-/sup 14/C) acetate or (U--/sup 14/C) glucose by intracranial injection and were sacrificed after 1 hr. Analysis of lipids from the two groups showed differences in the incorporation of radioactivity in the polar lipids and cholesterol. Analysis of brain fatty acid showed that whereas radioactivity from acetate was incorporated into ...

Energy Citations Database

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First Page Previous Page 1 2 3 4 5 Next Page Last Page
 
61
Effect of prolactin on enzymes of lipid biosynthesis in mammary gland explants
1988-10-01

Prolactin (PRL) stimulates an increased rate of incorporation of ({sup 14}C)acetate and ({sup 3}H)glucose into lipids in cultured mammary gland explants from 10-to 14-day-pregnant mice. This response is biphasic with an early increase occurring from 6 through 12 h, and an additional increase from 16 to 24 h. Enzymes likely to be rate limiting to this process include acetyl ...

Energy Citations Database

62
Properties of Succinyl-Coenzyme A:l-Malate Coenzyme A Transferase and Its Role in the Autotrophic 3-Hydroxypropionate Cycle of Chloroflexus aurantiacus
2006-04-01

The 3-hydroxypropionate cycle has been proposed to operate as the autotrophic CO2 fixation pathway in the phototrophic bacterium Chloroflexus aurantiacus. In this pathway, acetyl coenzyme A (acetyl-CoA) and two bicarbonate molecules are converted to malate. Acetyl-CoA is regenerated from malyl-CoA by l-malyl-CoA ...

PubMed Central

63
Impact of Cell Wall Acetylation on Corn Stover Hydrolysis by Cellulolytic and Xylanolytic Enzymes
2009-01-01

Analysis of variously pretreated corn stover samples showed neutral to mildly acidic pretreatments were more effective at removing xylan from corn stover and more likely to maintain the acetyl to xylopyranosyl ratios present in untreated material than were alkaline treatments. Retention of acetyl groups in the residual solids resulted in greater resistance ...

Energy Citations Database

64
Trypanosomatidae produce acetate via a mitochondrial acetate:succinate CoA transferase
1998-03-17

Hydrogenosome-containing anaerobic protists, such as the trichomonads, produce large amounts of acetate by an acetate:succinate CoA transferase (ASCT)/succinyl CoA synthetase cycle. The notion that mitochondria and hydrogenosomes may have originated from the same ?-proteobacterial endosymbiont has led us to look for the presence of a similar metabolic ...

PubMed Central

65
Kinetic and Chemical Mechanism of Malate Synthase from Mycobacterium tuberculosis.
2011-07-18

Malate synthase catalyzes the Claisen-like condensation of acetyl-coenzyme A (AcCoA) and glyoxylate in the glyoxylate shunt of the citric acid cycle. The Mycobacterium tuberculosis malate synthase G gene, glcB, was cloned, and the N-terminal His(6)-tagged 80 kDa protein was expressed in soluble form and purified by metal affinity chromatography. A chromogenic ...

PubMed

66
Acyl Carrier Protein: Effects of Acetylation and Tryptic Hydrolysis on Function in Fatty Acid Synthesis
1968-01-01

Acetylation of the four lysine residues and the amino group of the terminal serine residue of Escherichia coli acyl carrier protein has no effect on the ability of this protein to function in fatty acid synthesis. Subsequent trypsin hydrolysis resulting in complete inactivation cleaves a single arginyl peptide bond, releasing the amino terminal hexapeptide ...

NASA Astrophysics Data System (ADS)

67
A spectrophotometric assay for measuring acetyl-coenzyme A carboxylase.
2010-12-05

Acetyl-coenzyme A (CoA) carboxylase catalyzes the first step in the biosynthesis of fatty acids in bacteria and eukaryota. This enzyme is the target of drug design for treatment of human metabolic diseases and of herbicides acting specifically on the eukaryotic form of the enzyme in grasses. Acetyl-CoA carboxylase activity screening in ...

PubMed

68
Role of Arginines in Coenzyme A Binding and Catalysis by the Phosphotransacetylase from Methanosarcina thermophila
2001-07-01

Phosphotransacetylase (EC 2.3.1.8) catalyzes the reversible transfer of the acetyl group from acetyl phosphate to coenzyme A (CoA): CH3COOPO32? + CoASH ? CH3COSCoA + HPO42?. The role of arginine ...

PubMed Central

69
Modulation of Pantothenate Kinase 3 Activity by Small Molecules that Interact with the Substrate/Allosteric Regulatory Domain
2010-09-27

Pantothenate kinase (PanK) catalyzes the rate-controlling step in coenzyme A (CoA) biosynthesis. PanK3 is stringently regulated by acetyl-CoA and uses an ordered kinetic mechanism with ATP as the leading substrate. Biochemical analysis of site-directed mutants indicates that pantothenate binds in a tunnel adjacent to the active site that is occupied by the ...

Energy Citations Database

70
The 2.1� Crystal Structure of an Acyl-CoA Synthetase from Methanosarcina acetivorans reveals an alternate acyl binding pocket for small branched acyl substrates�,�
2009-11-15

The acyl-AMP forming family of adenylating enzymes catalyze two-step reactions to activate a carboxylate with the chemical energy derived from ATP hydrolysis. X-ray crystal structures have been determined for multiple members of this family and, together with biochemical studies, provide insights into the active site and catalytic mechanisms used by these enzymes. These ...

PubMed Central

71
Identification of the citrate-binding site of human ATP-citrate lyase using X-ray crystallography.
2010-06-17

ATP-citrate lyase (ACLY) catalyzes the conversion of citrate and CoA into acetyl-CoA and oxaloacetate, coupled with the hydrolysis of ATP. In humans, ACLY is the cytoplasmic enzyme linking energy metabolism from carbohydrates to the production of fatty acids. In situ proteolysis of full-length human ACLY gave crystals of a truncated ...

PubMed

72
Spermidinyl-CoA-based HAT inhibitors block DNA repair and provide cancer-specific chemo- and radiosensitization
2009-09-02

Acetyl group turnover on specific lysine ?-amino groups of the core chromosomal histones regulates DNA accessibility function, and the acetylating and deacetylating enzymes that govern the turnover provide important targets for the development of anti-cancer drugs. Histone deacetylase (HDAC) inhibitors have been developed and evaluated extensively in ...

PubMed Central

73
Prebiotic origin of glycolytic metabolism: histidine and cysteine can produce acetyl CoA from glucose via reactions homologous to non-phosphorylated Entner-Doudoroff pathway.
2008-05-31

Conversion of glucose to pyruvate via reactions homologous to the non-phosphorylated Entner-Doudoroff (non-P ED) pathway could be achieved in the presence of two amino acid catalysts, cysteine and histidine: cystine oxidizes glucose to gluconic acid by the reaction homologous to glucose dehydrogenase and histidine changes gluconic acid to 2-keto-3-deoxy gluconic acid, then to pyruvate by the ...

PubMed

74
Form variation in Escherichia coli K1: determined by O-acetylation of the capsular polysaccharide.
1979-03-01

The chemical basis for the alternating antigenic change called form variation noted for the Escherichia coli K1-capsular polysaccharide has been shown by 13C nuclear magnetic resonance to be a result of random O-acetylation of C7 and C9 carbons of the alpha-2-8-linked sialic acid homopolymer. A serologic method (antiserum agar) was developed to identify and isolate the form ...

PubMed

75
Form variation in Escherichia coli K1: determined by O-acetylation of the capsular polysaccharide
1979-03-01

The chemical basis for the alternating antigenic change called form variation noted for the Escherichia coli K1-capsular polysaccharide has been shown by 13C nuclear magnetic resonance to be a result of random O- acetylation of C7 and C9 carbons of the alpha-2-8-linked sialic acid homopolymer. A serologic method (antiserum agar) was developed to identify and isolate the form ...

PubMed Central

76
Analysis of Streptomyces coelicolor phosphopantetheinyl transferase, AcpS, reveals the basis for relaxed substrate specificity.
2011-06-06

The transfer of the phosphopantetheine chain from coenzyme A (CoA) to the acyl carrier protein (ACP), a key protein in both fatty acid and polyketide synthesis, is catalyzed by ACP synthase (AcpS). Streptomyces coelicolor AcpS is a doubly promiscuous enzyme capable of activation of ACPs from both fatty acid and polyketide synthesis and catalyzes the transfer of modified ...

PubMed

77
The Lipid a b liMetabolite

� HPLC analysis and quantitation o sources including tissue, plasma � HPLC analysis and quantitation o isolated bile � HPLC analysis and quantitation o hypoxanthine, inosine, IMP, NAD � HPLC analysis and quantitation o CoA and acetyl, malonyl, succiny l d� HPLC analysis and quantitation o � GC analysis

E-print Network

78
Resistance to acetyl CoA carboxylase-inhibiting herbicides in Lolium multiflorum

... and Rosa Giménez-Espinosaf aCorresponding author. Depto. de Química Agrícola y Edafología, E.T.S.I.A. ... 14080-Cordoba. Spain; qe1pramr@uco.es bDepto. de Química Agrícola y Edafología, E.T.S.I.A. .....

NBII National Biological Information Infrastructure

79
Project: � CIW � 2007 � Annual Reports � Library of Resources ...

... a metal-sulfide-catalyzed reaction that mimics the action of acetyl CoA synthase; ... Studies of the formation of RNA oligomers on the clay mineral sodium ... number of oligomers could have formed by this mechanism on the early Earth, ... A combination of scanning transmission X-ray microscopy and micro- Raman ...

NASA Website

80
EnzymeEnzyme

Enzyme () ( glycolysis) (computational biology) (systems biology) #12;E7-2 Diabetes Mellitus (1980) Eli Lilly Dressler & Potter (1991) Discovering Enzymes, p.22 - (glycolysis) - (TCA cycle) #12;E7-4 (1 Mitochondria Kinase Oxidative phosphorylation Glycolysis A Acetyl CoA Pyruvate Pyruvate STAGE 1 STAGE 2

E-print Network

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81
Changes in Hepatic Fatty Acid Synthesis Following Glucagon Injections in vivo.
1973-01-01

A marked decrease in hepatic fatty acid synthesis from glucose was observed fifteen and thirty minutes after intravenous injection of glucagon (1mg/kg) in anesthetized rats. This effect was apparently brought about by an inhibition of acetyl CoA carboxyla...

National Technical Information Service (NTIS)

82
Arylamine N-Acetyltransferases in Mycobacteria
2008-07-01

Polymorphic Human arylamine N-acetyltransferase (NAT2) inactivates the anti-tubercular drug isoniazid by acetyltransfer from acetylCoA. There are active NAT proteins encoded by homologous genes in mycobacteria including M. tuberculosis, M. bovis BCG, M. smegmatis and M. marinum. Crystallographic structures of NATs from M. smegmatis and M. marinum, as native enzymes and with ...

PubMed Central

83
1096-7176/02 $35.00 � 2002 Elsevier Science (USA)

accumulation, and carbon flux through the major carbon metabolic pathways (the Embden Meyerhoff Parnas-rhodomycinone via the Embden Meyerhoff Parnas (EMP) pathway, with a minor contribution of the pentose of acetyl- CoA (an intermediate in methylenomycin synthesis) from the Embden Meyerhoff Parnas pathway

E-print Network

84
Numerical percolation reactor model for xylan and acetyl-group hydrolysis
1984-08-01

A numerical model for percolation reactor performance during hemicellulose hydrolysis has been developed using recently-obtained hydrolysis rate models and a combination of orthogonal collocation and finite difference methods. This model accounts for the effect of the rates of heat and mass transfer to the wood particles on reactor performance. The effect ...

Energy Citations Database

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