Vitamin B6/Pyridoxine Hydrochloride/58-56-0

Vitamin B6/Pyridoxine Hydrochloride/58-56-0
1 CAS NO.:58-56-0
2 ISO certificate
3 Assay 99%
Vitamin B6/Pyridoxine Hydrochloride/58-56-0
1 CAS NO.:58-56-0
2 ISO certificate
3 Assay 99%

General Description

Vitamin B
6
is a water-soluble vitamin and is part of the vitamin B complex group. Several forms of the vitamin are known, but pyridoxal phosphate (PLP) is the active form and is a cofactor in many reactions of amino acid metabolism, including transamination, deamination, and decarboxylation. PLP also is necessary for the enzymatic reaction governing the release of glucose from glycogen.

Functions and Application

1, Pyridoxal phosphate
, the metabolically active form of vitamin B
6
, is involved in many aspects of macronutrient metabolism, neurotransmitter synthesis, histamine synthesis, hemoglobin synthesis and function and gene expression. Pyridoxal phosphate generally serves as a coenzyme for many reactions and can help facilitate decarboxylation, transamination, racemization, elimination, replacement and beta-group interconversion reactions.
[3]
The liver is the site for vitamin B
6
metabolism.

2, Amino acid metabolism

Pyridoxal phosphate (PLP) is a cofactor in transaminases that can catabolize amino acids. PLP is also an essential component of two enzymes that converts methionine to cysteine via two reactions. Low vitamin B
6
status will result in decreased activity of these enzymes. PLP is also an essential cofactor for enzymes involved in the metabolism of selenomethionine to selenohomocysteine and then from selenohomocysteine to hydrogen selenide. Vitamin B
6
is also required for the conversion of tryptophan to niacin and low vitamin B
6
status will impair this conversion.
[3]
PLP is also used to create physiologically active amines by decarboxylation of amino acids. Some notable examples of this include: histidine to histamine, tryptophan to serotonin, glutamate to gamma-aminobutyric acid (GABA), and dihydroxyphenylalanine to dopamine.

3,Gluconeogenesis

Vitamin B
6
also plays a role in gluconeogenesis. Pyridoxal phosphate can catalyze transamination reactions that are essential for the providing amino acids as a substrate for gluconeogenesis. Also, vitamin B
6
is a required coenzyme of glycogen phosphorylase,
[3]
the enzyme that is necessary for glycogenolysis to occur.

4,Lipid metabolism

Vitamin B
6
is an essential component of enzymes that facilitate the biosynthesis of sphingolipids.
[3]
Particularly, the synthesis of ceramide requires PLP. In this reaction serine is decarboxylated and combined with palmitoyl-CoA to form sphinganine which is combined with a fatty acyl CoA to form dihydroceramide. Dihydroceramide is then further desaturated to form ceramide. In addition, the breakdown of sphingolipids is also dependent on vitamin B
6
since S1P lyase, the enzyme responsible for breaking down sphingosine-1-phosphate, is also PLP dependent.


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