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4-アミノ酪酸

4-アミノ酪酸 化学構造式
56-12-2
CAS番号.
56-12-2
化学名:
4-アミノ酪酸
别名:
4-アミノ酪酸;γ-アミノブタン酸;γ-アミノ酪酸;γ-アミノ-酪酸;ミエロゲン;ギャバ;ガバ;アミナロン;ガマル;ガマレックス;ガンマロン;ピペリジン酸;ガンマソール;4-アミノブタン酸;ガバロン;ガンマ-アミノ酪酸;ミエロマド;γアミノ酪酸;4-アミノ-n-酪酸;4‐アミノ酪酸
英語化学名:
4-Aminobutyric acid
英語别名:
GABA;df468;gamma;(2D2);(3B7);Gammar;Immu-G;Reanal;DF 468;Gamarex
CBNumber:
CB3184042
化学式:
C4H9NO2
分子量:
103.12
MOL File:
56-12-2.mol

4-アミノ酪酸 物理性質

融点 :
195 °C (dec.) (lit.)
沸点 :
248.0±23.0 °C(Predicted)
比重(密度) :
1.2300 (estimate)
屈折率 :
1.4650 (estimate)
FEMA :
4288 | 4-AMINOBUTYRIC ACID
貯蔵温度 :
2-8°C
溶解性:
H2O: 1 M at 20 °C, clear, colorless
酸解離定数(Pka):
4.031(at 25℃)
外見 :
Powder
色:
White to almost white
水溶解度 :
SOLUBLE
Merck :
14,430
JECFA Number:
1771
BRN :
906818
InChIKey:
BTCSSZJGUNDROE-UHFFFAOYSA-N
CAS データベース:
56-12-2(CAS DataBase Reference)
NISTの化学物質情報:
4-Aminobutanoic acid(56-12-2)
EPAの化学物質情報:
4-Aminobutanoic acid (56-12-2)

安全性情報

主な危険性  Xi,Xn
Rフレーズ  36/37/38-20/21/22
Sフレーズ  26-36
WGK Germany  2
RTECS 番号 ES6300000
Hazard Note  Irritant
TSCA  Yes
HSコード  29224995
化審法 (9)-114

4-アミノ酪酸 価格 もっと(39)

メーカー 製品番号 製品説明 CAS番号 包装 価格 更新時間 購入
富士フイルム和光純薬株式会社(wako) W01COBNA-0147 4-アミノ酪酸
4-Aminobutyric acid
56-12-2 5g ¥3600 2021-03-23 購入
富士フイルム和光純薬株式会社(wako) W01COBNA-0147 4-アミノ酪酸
4-Aminobutyric acid
56-12-2 25g ¥5400 2021-03-23 購入
東京化成工業 A0282 4-アミノ酪酸 >99.0%(T)
4-Aminobutyric Acid >99.0%(T)
56-12-2 25g ¥2400 2021-03-23 購入
東京化成工業 A0282 4-アミノ酪酸 >99.0%(T)
4-Aminobutyric Acid >99.0%(T)
56-12-2 100g ¥7200 2021-03-23 購入
関東化学株式会社(KANTO) 01754-32 4‐アミノ酪酸 >95.0%
4‐Aminobutyric acid >95.0%
56-12-2 25g ¥2500 2021-03-23 購入

4-アミノ酪酸 MSDS


GABA

4-アミノ酪酸 化学特性,用途語,生産方法

外観

白色, 結晶~結晶性粉末

定義

本品は、次の化学式で表されるアミノ酸である。

溶解性

水に極めて溶けやすい。メタノールに溶けにくく, ジエチルエーテルにほとんど溶けない。

解説

化学式 NH2CH2CH2CH2COOH ,略称 GABA 。ピペリジン酸ともいう。ジャガイモの根茎,リンゴの果肉,マメ科植物の根粒,タバコやチャの葉,哺乳動物の脳髄など,動植物界にかなり広く遊離状態で存在する。無色針状晶。融点 203℃ (分解) 。水に易溶,有機溶媒に不溶。生体内でグルタミン酸から脱炭酸酵素の作用で生じる。神経伝達物質の一つ。
ブリタニカ国際大百科事典 小項目事典 ブリタニカ

用途

薬理及び生理作用研究用、医薬原料、有機合成原料。

化粧品の成分用途

エモリエント剤

効能

脳代謝促進薬, 神経伝達物質

商品名

ガンマロン (アルフレッサファーマ)

説明

4-Aminobutyric acid (GABA) is the chief inhibitory neurotransmitter in the mammalian central nervous system. It plays a role in regulating neuronal excitability throughout the nervous system. In humans, GABA is also directly responsible for the regulation of muscle tone. Although chemically it is an amino acid, GABA is rarely referred to as such in the scientific or medical communities, because the term "amino acid," used without a qualifier, conventionally refers to the alpha amino acids, which GABA is not, nor is it ever incorporated into a protein. In spastic diplegia in humans, GABA absorption becomes impaired by nerves damaged from the condition's upper motor neuron lesion, which leads to hypertonia of the muscles signaled by those nerves that can no longer absorb GABA.

化学的特性

White, powdery solid; savory, meat-like aroma

来歴

4-Aminobutyric acid (GABA) was first synthesized in 1883, and was first known only as a plant and microbe metabolic product. In 1950, however, GABA was discovered to be an integral part of the mammalian central nervous system.

使用

An important inhibitory neurotransmitter. The foods contain γ-aminobutyric acid (GABA) at an amount that shows immediate effect of suppressing autonomic nerve activity related to blood pressure increase. Reacts with isothiocyanates to produce thioureas which have antifungal activity.

使用

antihypertensive

使用

In the production of polymers, food additives, and pharmaceuticals. Acrylic acid and methacrylic acids are well known precursors of polymers.

定義

An unusual amino acid having the fol- lowing isomers: α: CH 3 CH 2 CH(NH 2 )COOH. Iso- lated from a bacterium (Corynebacterium diph- theriae). The dl form is a crystalline solid, mp 305C, soluble in water, slightly soluble in alco- hol, insoluble in ether. The l(+) form is solid, mp 270C, sweetish taste, soluble in water. β: CH 2 CH(NH 2 )CH 2 COOH. The dl form is a tasteless solid, mp 190C, water soluble, insoluble in ether and alcohol. The d(?) form decomposes at 220C. γ: (GABA) H 2 N(CH 2 ) 3 COOH. Obtained from bac- teria, yeast, and plant life. Crystalline solid, mp 202C, soluble in water, insoluble in organic sol- vents. Decomposes to pyrrolidone and water on quick heating. This substance is reported to be a neurotransmitter that activates or retards nervous reactions in the cells of the brain, including the sense of pain. All three isomers have been synthesized by various reaction sequences, the first reported in 1880.

Aroma threshold values

Medium strength odor; savory meaty type; recommend smelling in a 1.00% solution or less.

生物学の機能

Neuro transmitter
In vertebrates, GABA acts at inhibitory synapses in the brain by binding to specific transmembrane receptors in the plasma membrane of both pre- and postsynaptic neuronal processes. This binding causes the opening of ion channels to allow the flow of either negatively charged chloride ions into the cell or positively charged potassium ions out of the cell. This action results in a negative change in the transmembrane potential, usually causing hyperpolarization. Two general classes of GABA receptor are known: GABAA in which the receptor is part of a ligand-gated ion channel complex, and GABAB metabotropic receptors, which are G protein-coupled receptors that open or close ion channels via intermediaries (G proteins).
Neurons that produce GABA as their output are called GABAergic neurons, and have chiefly inhibitory action at receptors in the adult vertebrate. Medium Spiny Cells are a typical example of inhibitory CNS GABAergic cells. In contrast, GABA exhibits both excitatory and inhibitory actions in insects, mediating muscle activation at synapses between nerves and muscle cells, and also the stimulation of certain glands. In mammals, some GABAergic neurons, such as chandelier cells, are also able to excite their glutamatergic counterparts.
Brain development
While GABA is an inhibitory transmitter in the mature brain, its actions are primarily excitatory in the developing brain. The gradient of chloride is reversed in immature neurons, and its reversal potential is higher than the resting membrane potential of the cell; activation of a GABA-A receptor thus leads to efflux of Cl- ions from the cell, i.e. a depolarizing current. The differential gradient of chloride in immature neurons is primarily due to the higher concentration of NKCC1 co-transporters relative to KCC2 cotransporters in immature cells. GABA itself is partially responsible for orchestrating the maturation of ion pumps . GABA-ergic interneurons mature faster in the hippocampus and the GABA signalling machinery appears earlier than glutamatergic transmission. Thus, GABA is the major excitatory neurotransmitter in many regions of the brain before the maturation of glutamateergic synapses.
Beyond the nervous system
GABAergic mechanisms have been demonstrated in various peripheral tissues and organs including, but not restricted to the intestine, stomach, pancreas, Fallopian tube, uterus, ovary, testis, kidney, urinary bladder, lung, and liver.

Synthesis Reference(s)

The Journal of Organic Chemistry, 47, p. 587, 1982 DOI: 10.1021/jo00342a048

一般的な説明

γ-Aminobutyric acid is a chief inhibitory neurotransmitter, which is found in the cerebellum, hypothalamus, thalamus and hippocampus. It is formed via the decarboxylation of L-glutamate catalyzed by the enzyme, glutamic acid decarboxylase(GAD).

生物活性

Endogenous inhibitory neurotransmitter.

Biochem/physiol Actions

Major inhibitory neurotransmitter in brain; GABAA and GABAB receptor agonist; increases Cl? conductance.

作用機序

γ-Aminobutyric acid (GABA) probably represents the most important inhibitory transmitter of the mammalian CNS (also see Chapter 15). Both types of GABAergic inhibition (pre- and postsynaptic) use the same GABAA receptor subtype, which acts by regulation of the chloride channel of the neuronal membrane. A second GABA receptor type, GABAB, that is a G protein–coupled receptor is not considered to be important in understanding the mechanism of hypnotics. Activation of a GABAA receptor by an agonist increases the inhibitory synaptic response of central neurons to GABA through hyperpolarization. Because many, if not all, central neurons receive some GABAergic input, this leads to a mechanism by which CNS activity can be depressed. For example, if the GABAergic interneurons are activated by an agonist that inhibits the monoaminergic structures of the brainstem, hypnotic activity will be observed. The specific neuronal structures in different brain regions affected by GABAA agonist continues to be better defined.

薬理学

Drugs that act as allosteric modulators of GABA receptors (known as GABA analogues or GABAergic drugs) or increase the available amount of GABA typically have relaxing, anti-anxiety, and anti-convulsive effects. Many of the substances below are known to cause anterograde amnesia and retrograde amnesia.
In general, GABA does not cross the blood–brain barrier, although certain areas of the brain that have no effective blood–brain barrier, such as the periventricular nucleus, can be reached by drugs such as systematically injected GABA. At least one study suggests that orally administered GABA increases the amount of Human Growth Hormone. GABA directly injected to the brain has been reported to have both stimulatory and inhibitory effects on the production of growth hormone, depending on the physiology of the individual.

Chemical Synthesis

4-Aminobutyric acid (GABA) does not penetrate the blood – brain barrier; it is synthesized in the brain. It is synthesized from glutamate using the enzyme L-glutamic acid decarboxylase and pyridoxal phosphate (which is the active form of vitamin B6) as a cofactor via a metabolic pathway called the GABA shunt. This process converts glutamate, the principal excitatory neurotransmitter, into the principal inhibitory neurotransmitter (GABA).

代謝

GABA transaminase enzyme catalyzes the conversion of 4- aminobutanoic acid and 2-oxoglutarate into succinic semialdehyde and glutamate. Succinic semialdehyde is then oxidized into succinic acid by succinic semialdehyde dehydrogenase and as such enters the citric acid cycle as a usable source of energy.

純化方法

Crystallise GABA from aqueous EtOH or MeOH/Et2O. Also crystallise it by dissolving it in the least volume of H2O and adding 5-7 volumes of absolute EtOH. [Sherman Biochemical Preparations 4 91 1955, de Witt Org Synth Coll Vol II 25 1943, Beilstein 4 III 1316, 4 IV 2600.]

GABA as a supplement

A number of commercial sources sell formulations of GABA for use as a dietary supplement, sometimes for sublingual administration. These sources typically claim that the supplement has a calming effect. These claims are not yet scientifically proven. For example, there is evidence stating that the calming effects of GABA can be seen observably in the human brain after administration of GABA as an oral supplement. However, there is also evidence that GABA does not cross the blood – brain barrier at significant levels.
There are some over-the-counter supplements such as phenylated GABA itself directly, or Phenibut; and Picamilon (both Soviet cosmonaut products) – Picamilon combines niacin and phenylated GABA and crosses the blood–brain barrier as a prodrug that later hydrolyzes into GABA and niacin.

GABA ergic drugs

Agonists / Positive allosteric modulators : ethanol , barbiturates , benzo diazepines , carisoprodol , chloral hydrate , etaqualone, etomidate , glutethimide , kava , methaqualone , muscimol , neuroactive steroids , z-drugs , propofol , scullcap , valerian , volatile / inhaled anaesthetics.
Antagonists / Negative allosteric modulators: bicuculline, cicutoxin, flumazenil, furosemide, gabazine, oenanthotoxin, picrotoxin, Ro15-4513, thujone.

Structure and conformation

4-Aminobutyric acid (GABA) is found mostly as a zwitterion, that is, with the carboxy group deprotonated and the amino group protonated. Its conformation depends on its environment. In the gas phase, a highly folded conformation is strongly favored because of the electrostatic attraction between the two functional groups. The stabilization is about 50 kcal/mol, according to quantum chemistry calculations. In the solid state, a more extended conformation is found, with a trans conformation at the amino end and a gauche conformation at the carboxyl end. This is due to the packing interactions with the neighboring molecules. In solution, five different conformations, some folded and some extended, are found as a result of solvation effects. The conformational flexibility of GABA is important for its biological function, as it has been found to bind to different receptors with different conformations. Many GABA analogues with pharmaceutical applications have more rigid structures in order to control the binding better.

4-アミノ酪酸 上流と下流の製品情報

原材料

準備製品


4-アミノ酪酸 生産企業

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56-12-2(4-アミノ酪酸)キーワード:


  • 56-12-2
  • 4-AMINOBUTANOIC ACID
  • 4-AMINOBUTYRIC ACID
  • 4-AMINO-N-BUTYRIC ACID
  • ALPHA-AMINOBUTANOIC ACID
  • AMINOBUTYRIC ACID, 4-
  • AMINOBUTYRIC-4 ACID
  • AURORA KA-1053
  • H-4-AMINOBUTYRIC ACID
  • H-ABU(GAMMA)-OH
  • H-ABU(4)-OH
  • GABA
  • df468
  • Gaballon
  • Gamarex
  • Gamastan
  • gamma
  • gamma-Aminobutanoic acid
  • gamma-Aminobutryic acid
  • gamma-Aminobuttersaeure
  • Gammagee
  • Gammalon
  • Gammalone
  • Gammar
  • Gammasol
  • Gamulin
  • Globulin, immune human serum
  • Immu-G
  • Immuglobin
  • Mielogen
  • Mielomade
  • 4-アミノ酪酸
  • γ-アミノブタン酸
  • γ-アミノ酪酸
  • γ-アミノ-酪酸
  • ミエロゲン
  • ギャバ
  • ガバ
  • アミナロン
  • ガマル
  • ガマレックス
  • ガンマロン
  • ピペリジン酸
  • ガンマソール
  • 4-アミノブタン酸
  • ガバロン
  • ガンマ-アミノ酪酸
  • ミエロマド
  • γアミノ酪酸
  • 4-アミノ-n-酪酸
  • 4‐アミノ酪酸
  • ガンマーアミノ酪酸
  • ガンマーアミノ酪酸 (JAN)
  • ω-アミノカルボン酸
  • ω-官能性アルカノール, カルボン酸, アミン & ハライド
  • アミノ酸
  • 非タンパク構成アミノ酸
  • 構造分類
  • 生化学
  • 代謝産物
  • 脳代謝賦活薬
  • 殺虫剤
  • 神経系作用薬
  • 神経伝達物質
  • 植物成長調整剤
  • アミノ酪酸
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