Compound K (CK) is a major intestinal metabolite of ginsenosides derived from ginseng radix. Although antidiabetic and antihyperlipidemic activities of CK have been investigated in recent years, action mechanism of CK remains poorly understood. Therefore, we examined whether CK affects the lipid metabolism in insulin-resistant HepG2 human hepatoma cells. In this study, a significant increase in...

The cytosolic isoform of plant acetyl-CoA carboxylase is a multidomain enzyme involved in the synthesis of very-long-chain fatty acids and in secondary metabolism. Chromosome mapping of wheat identified one locus containing cytosolic acetyl-CoA carboxylase genes (Acc-2) and a related partially processed pseudogene (Psi-Acc-2) in the distal region of the long arm of wheat homoeologous group 3 ch...

Abstract The European grapevine moth, Lobesia botrana , uses ( E Z )-7,9-dodecadienyl acetate as its major sex pheromone component. Through in vivo labeling experiments we demonstrated that the doubly unsaturated component is produced by ?11 desaturation of tetradecanoic acid, followed chain shortening )-11-tetradecenoic acid to )-9-dodecenoic and subsequently introduction second double bond an...

The ubiquitous acetyl-CoA carboxylase is a pivotal enzyme in the synthesis of fatty acids in both eukaryotes and prokaryotes. The importance of this enzyme is needed in the initiating reaction for synthesizing fatty acids, which are very important when used as fuel molecules and providing the building blocks of biological membranes. Acetyl-CoA carboxylase catalyzes the committed step in making ...

A normal mash diet or a single glucose injection stimulates fatty acid synthesis and increases the total activities of acetyl coenzyme A carboxylase, fatty acid synthetase, and malic enzyme in the livers of neonatal chicks. Feeding and glucose injection caused a decrease in the concentration of free fatty acids and fatty acyl-CoA and an increase in CYglycerophosphate and free CoA. These concent...

Biotin-containing proteins are found in all forms of life, and they catalyze carboxylation, decarboxylation, or transcarboxylation reactions that are central to metabolism. In plants, five biotin-containing proteins have been characterized. Of these, four are catalysts, namely the two structurally distinct acetyl-CoA carboxylases (heteromeric and homomeric), 3-methylcrotonyl-CoA carboxylase and...

ses the first step in this pathway and its activity is regulated allosterically, e.g. citrate (activator) and long-chain fatty acyl-CoA (inhibitor), and by reversible phosphorylation (Hardie, 1980; Hardie et al., 1984). It is thus a prime candidate for such specific inhibition. In the lactating mammary gland, 24 h starvation inhibits lipogenesis by 98% and this is accompanied by an inhibition o...

Fructose and lactate markedly stimulated fatty acid synthesis from [lJ4C]acetate in isolated cells prepared from the livers of unfed neonatal chicks (21 or 22 days of incubation). In liver cells obtained from unhatched chicks (19 days of incubation) fructose and lactate had very small stimulatory effects on fatty acid synthesis. The increase in fructoseand lactate-stimulated fatty acid synthesi...

Extracts from human platelets contain the enzymes of de novo fatty acid biosynthesis. The pattern of incorporation of acetate-1-(14)C into fatty acids by intact platelets indicates that these enzymes function in platelets. The level of acetyl-coenzyme A (CoA) carboxylase activity in extracts of platelets from normal subjects is 0.036 +/-0.01 mmumole of malonyl-CoA formed per min per mg of prote...