Names | |
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IUPAC names (+) form:
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Other names (+)-Pinoresinol (-)-Pinoresinol | |
Identifiers | |
3D model (JSmol) | |
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KEGG | |
PubChem CID | |
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CompTox Dashboard (EPA) | |
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Properties | |
C20H22O6 | |
Molar mass | 358.38 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). |
Pinoresinol is a tetrahydrofuran lignan [1] found in Styrax sp., [2] Forsythia suspensa, and in Forsythia koreana. [3] [4] It is also found in the caterpillar of the cabbage butterfly, Pieris rapae where it serves as a defence against ants. [5]
In food, it is found in sesame seed, in Brassica vegetables [6] and in olive oil. [7] Pinoresinol has also been found to be toxic to larvae of the milkweed bug Oncopeltus fasciatus and of the haematophagous insect Rhodnius prolixus , which is a vector of chagas disease. [8]
Currently, pinoresinol is isolated from plants with low efficiency and low yield. [9]
A first dirigent protein was discovered in Forsythia intermedia . This protein has been found to direct the stereoselective biosynthesis of (+)-pinoresinol from coniferyl alcohol monomers. [10] Recently, a second, enantiocomplementary dirigent protein was identified in Arabidopsis thaliana , which directs enantioselective synthesis of (-)-pinoresinol. [11]
Pinoresinol inhibits the enzyme α-glucosidase in vitro and may therefore act as a hypoglycemic agent. [12] A study involving extra virgin olive oil showed that pinoresinol possess in vitro chemoprevention properties. Increased apoptosis and cellular arrest at the G2/M stage in p53-proficient cells occurred. [13] Pinoresinol of olive oil decreases vitamin D intestinal absorption. [14]
Pinoresinol, along with other plant lignans, are converted into enterolignans by intestinal microflora in the human body. [15]
Sesame is a plant in the genus Sesamum, also called benne. Numerous wild relatives occur in Africa and a smaller number in India. It is widely naturalized in tropical regions around the world and is cultivated for its edible seeds, which grow in pods. World production in 2018 was 6 million tonnes, with Sudan, Myanmar, and India as the largest producers.
Cedrus deodara, the deodar cedar, Himalayan cedar, or deodar, is a species of cedar native to the Himalayas.
Secoisolariciresinol diglucoside (SDG) is an antioxidant phytoestrogen present in flax, sunflower, sesame, and pumpkin seeds. In food, it can be found in commercial breads containing flaxseed. It is a precursor of mammal lignans which are produced in the colon from chemicals in foods.
In chemistry, stereoselectivity is the property of a chemical reaction in which a single reactant forms an unequal mixture of stereoisomers during a non-stereospecific creation of a new stereocenter or during a non-stereospecific transformation of a pre-existing one. The selectivity arises from differences in steric and electronic effects in the mechanistic pathways leading to the different products. Stereoselectivity can vary in degree but it can never be total since the activation energy difference between the two pathways is finite: both products are at least possible and merely differ in amount. However, in favorable cases, the minor stereoisomer may not be detectable by the analytic methods used.
The lignans are a large group of low molecular weight polyphenols found in plants, particularly seeds, whole grains, and vegetables. The name derives from the Latin word for "wood". Lignans are precursors to phytoestrogens. They may play a role as antifeedants in the defense of seeds and plants against herbivores.
Nitrophorins are hemoproteins found in the saliva of blood-feeding insects. Saliva of the blood-sucking bug Rhodnius prolixus contains at least seven homologous nitrophorins, designated NP1 to NP7 in order of their relative abundance in the glands. As isolated, nitrophorins contain nitric oxide (NO) ligated to the ferric heme iron (Fe3+). Histamine, which is released by the host in response to tissue damage, is another nitrophorin ligand. Nitrophorins transport NO to the feeding site. Dilution, binding of histamine and increase in pH (from pH ~5 in salivary gland to pH ~7.4 in the host tissue) facilitate the release of NO into the tissue where it induces vasodilatation.
Secoisolariciresinol is an organic compound. It is classified as a lignan, i.e., a type of phenylpropanoid. It is present in some cereals, such as rye, and together with matairesinol has attracted much attention for its beneficial nutritional effects.
Podophyllotoxin (PPT) is the active ingredient in Podofilox, a medical cream used to treat genital warts and molluscum contagiosum. It is not recommended for HPV infections without external warts. It can be applied either by a healthcare provider or the patient themselves.
Coniferyl alcohol is an organic compound with the formula HO(CH3O)C6H3CH=CHCH2OH. A colourless or white solid, it is one of the monolignols, produced via the phenylpropanoid biochemical pathway. When copolymerized with related aromatic compounds, coniferyl alcohol forms lignin or lignans. Coniferin is a glucoside of coniferyl alcohol. Coniferyl alcohol is an intermediate in biosynthesis of eugenol and of stilbenoids and coumarin. Gum benzoin contains significant amount of coniferyl alcohol and its esters. It is found in both gymnosperm and angiosperm plants. Sinapyl alcohol and paracoumaryl alcohol, the other two lignin monomers, are found in angiosperm plants and grasses.
Dirigent proteins are members of a class of proteins which dictate the stereochemistry of a compound synthesized by other enzymes. The first dirigent protein was discovered in Forsythia intermedia. This protein has been found to direct the stereoselective biosynthesis of (+)-pinoresinol from coniferyl alcohol monomers:
Matairesinol is an organic compound. It is classified as a lignan, i.e., a type of phenylpropanoid. It is present in some cereals, such as rye, and together with secoisolariciresinol has attracted much attention for its beneficial nutritional effects.
Forsythia suspensa, commonly known as weeping forsythia or golden-bell, is a species of flowering plant in the family Oleaceae. It is native to China.
GBA2 is the gene that encodes the enzyme non-lysosomal glucosylceramidase in humans. It has glucosylceramidase activity.
Haemozoin is a disposal product formed from the digestion of blood by some blood-feeding parasites. These hematophagous organisms such as malaria parasites, Rhodnius and Schistosoma digest haemoglobin and release high quantities of free heme, which is the non-protein component of haemoglobin. Heme is a prosthetic group consisting of an iron atom contained in the center of a heterocyclic porphyrin ring. Free heme is toxic to cells, so the parasites convert it into an insoluble crystalline form called hemozoin. In malaria parasites, hemozoin is often called malaria pigment.
Forsythia × intermedia, or border forsythia, is an ornamental deciduous shrub of garden origin.
Lariciresinol is a lignan, i.e., a type of phenylpropanoids. It is the precursor to enterolignans by the action of gut microflora. Enterolignans are of interest because they are speculated to exhibit beneficial medicinal properties.
Enterolactone is an organic compound classified as an enterolignan. It is formed by the action of intestinal bacteria on plant lignan precursors present in the diet.
Cytosolic beta-glucosidase, also known as cytosolic beta-glucosidase-like protein 1, is a beta-glucosidase enzyme that in humans is encoded by the GBA3 gene.
Eugenol synthase (EC 1.1.1.318, LtCES1, EGS1, EGS2) is an enzyme with systematic name eugenol:NADP+ oxidoreductase (coniferyl ester reducing). This enzyme catalyses the following chemical reaction: eugenol + a carboxylate + NADP+ a coniferyl ester + NADPH + H+