Gene Association: MED4
UniProt Search:
MED4 (PROTEIN_CODING)
Function Description: mediator complex subunit 4
found 12 associated metabolites with current gene based on the text mining result from the pubmed database.
Dimethylpropiothetin
Dimethylsulfoniopropionate, also known as dimethylpropiothetin or S-dimethylsulfonium propionic acid, is a member of the class of compounds known as carboxylic acid salts. Carboxylic acid salts are ionic derivatives of carboxylic acid. Dimethylsulfoniopropionate is slightly soluble (in water) and a weakly acidic compound (based on its pKa). Dimethylsulfoniopropionate can be found in a number of food items such as sugar apple, american butterfish, coriander, and oxheart cabbage, which makes dimethylsulfoniopropionate a potential biomarker for the consumption of these food products. Dimethylsulfoniopropionate (DMSP), is an organosulfur compound with the formula (CH3)2S+CH2CH2COO−. This zwitterionic metabolite can be found in marine phytoplankton, seaweeds, and some species of terrestrial and aquatic vascular plants. It functions as an osmolyte as well as several other physiological and environmental roles have also been identified. DMSP was first identified in the marine red alga Polysiphonia fastigiata by Frederick Challenger and Margaret Simpson (later Dr. Whitaker) . D005765 - Gastrointestinal Agents > D000897 - Anti-Ulcer Agents
Phycocyanobilin
Phycocyanobilin is a linear, open-chain tetrapyrrole pigment that belongs to the family of bilins. It serves as a chromophore in various phytochrome photoreceptors found in cyanobacteria, as well as in the chlorosomes of green sulfur bacteria. Phycocyanobilin is a key component of phycobiliproteins, which are water-soluble pigments involved in light harvesting during photosynthesis. **Chemical Structure:** Phycocyanobilin has a molecular formula of C33H36N4O6 and a molecular weight of approximately 596.67 g/mol. Structurally, it consists of a porphyrin backbone with four pyrrole rings connected by methine bridges. The pyrrole rings contain nitrogen atoms that coordinate a central magnesium ion in phycobiliproteins. Unlike chlorophyll, phycocyanobilin has an open-chain structure due to the presence of a double bond between the C-20 and C-21 positions of the macrocyclic ring, which prevents it from forming a fully circular porphyrin ring. **Properties:** - **Color:** Phycocyanobilin imparts a blue color to the phycobiliproteins in which it is bound. The specific color is due to the electronic structure of the phycocyanobilin molecule, which allows it to absorb light in the red region of the visible spectrum, typically around 620-630 nm. - **Solubility:** Unlike many other pigments, phycocyanobilin is water-soluble due to its binding to phycobiliproteins, which enhances its functionality in the thylakoid membranes of cyanobacteria. - **Chemical Reactivity:** Phycocyanobilin can be isomerized and oxidized to form other bilins, such as phycoerythrobilin and phycourobilin, which have different spectral properties and can be found in different phycobiliproteins. **Biological Role:** Phycocyanobilin plays a critical role in the photosynthetic process of cyanobacteria and certain green sulfur bacteria. Its primary functions include: - **Light Harvesting:** In phycobiliproteins like phycocyanin, phycocyanobilin serves as a light-harvesting antenna. It absorbs light energy and transfers it to the photosynthetic reaction centers, where it is used to drive the synthesis of ATP and NADPH. - **Photoregulation:** In cyanobacteria, phycocyanobilin is also involved in the regulation of photosynthesis through the action of phytochrome-like photoreceptors. These photoreceptors can switch between a Pr (red-absorbing) and a Pfr (far-red-absorbing) form in response to light, regulating gene expression and various metabolic processes. **Synthesis:** Phycocyanobilin is synthesized from the amino acid L-arginine through a series of enzymatic reactions that include the production of 5-aminolevulinic acid (ALA), which is then transformed into protoporphyrin IX. The protoporphyrin IX is subsequently modified to form phycocyanobilin, a process that involves the removal of the macrocyclic ring and the introduction of the double bond at the C-20 and C-21 positions. In summary, phycocyanobilin is an essential pigment for the photosynthetic apparatus of certain photosynthetic organisms, contributing to their ability to capture and utilize light energy for the production of organic compounds. Its unique structure and properties allow it to perform a variety of functions that are critical to the survival and ecological success of these organisms.
15,16-Dihydrobiliverdin
magnesium;methyl (3R,21S,22S)-11,16-bis(ethenyl)-12,17,21,26-tetramethyl-4-oxo-22-[3-oxo-3-[(E,7R,11R)-3,7,11,15-tetramethylhexadec-2-enoxy]propyl]-23,25-diaza-7,24-diazanidahexacyclo[18.2.1.15,8.110,13.115,18.02,6]hexacosa-1,5,8(26),9,11,13(25),14,16,18,20(23)-decaene-3-carboxylate
1,3-Butadiene
1,3-Butadiene is a simple conjugated diene with the formula C4H6. It is an important industrial chemical used as a monomer in the production of synthetic rubber. When the word butadiene is used, most of the time it refers to 1,3-butadiene. 1,3-Butadiene is inconvenient for laboratory use because it is a flammable gas subject to polymerization on storage. 3-Butadiene cyclic sulfone (sulfolene) is a convenient solid storable source for 1,3-butadiene for many laboratory purposes when the generation of sulfur dioxide byproduct in the reaction mixture is not objectionable. Long-term exposure has been associated with cardiovascular disease, there is a consistent association with leukemia, and weaker association with other cancers. Most butadiene is polymerized to produce synthetic rubber. While polybutadiene itself is a very soft, almost liquid material, copolymers prepared from mixtures of butadiene with styrene and/or acrylonitrile, such as acrylonitrile butadiene styrene (ABS), acrylonitrile butadiene (NBR) and styrene-butadiene (SBR) are tough and elastic. SBR is the material most commonly used for the production of automobile tires. Smaller amounts of butadiene are used to make the nylon intermediate, adiponitrile, by the addition of a molecule of hydrogen cyanide to each of the double bonds in a process called hydrocyanation developed by DuPont. Other synthetic rubber materials such as chloroprene, and the solvent sulfolane are also manufactured from butadiene. Butadiene is used in the industrial production of 4-vinylcyclohexene via a Diels Alder dimerization reaction and the vinylcyclohexene is a common impurity found in butadiene upon storage. Cyclooctadiene and cyclododecatriene are produced via nickel- or titanium-catalyzed dimerization and trimerization reactions, respectively. Butadiene is also useful in the synthesis of cycloalkanes and cycloalkenes, as it reacts with double and triple carbon-carbon bonds through the Diels-Alder reaction. The name butadiene can also refer to the isomer, 1,2-butadiene, which is a cumulated diene. However, this allene is difficult to prepare and has no industrial significance. This diene is also not expected to act as a diene in a Diels-Alder reaction due to its structure. To effect a Diels-Alder reaction only a conjugated diene will suffice. D009676 - Noxae > D002273 - Carcinogens D009676 - Noxae > D009153 - Mutagens
(2R,3Z)-Phycocyanobilin
Dimethylpropiothetin
D005765 - Gastrointestinal Agents > D000897 - Anti-Ulcer Agents
