Vitamin B6

维生素 B6

Place · Level 3

PLP 是氨基酸交通枢纽 · 连接蛋白、神经递质和糖原动员

Connected to · 4

synergy · 1

Vitamin B12
B12 + folate run remethylation; B6 routes Hcy to transsulfuration. Any one short and Hcy rises.

cofactor · 2

Folate
PLP runs SHMT (serine ↔ glycine + 5,10-methylene-THF) and Hcy transsulfuration. Folate and B6 occupy two sides of the same junction.
Protein
What the body lacks is never the amino group but the carbon skeletons of the 9 essential amino acids: transaminases move an amino group from one molecule to another all day, and the coenzyme doing it is PLP, the active form of B6.

regulates · 1

Menstrual Cycle
B6 has limited but real evidence for premenstrual symptoms. It is also one of the few water-soluble vitamins that harms when overdone — chronic intake above 100 mg/day risks peripheral neuropathy. Remember both ends of this line.

PLP: the amino-acid toolhead

Stop 1/5

PLP · 氨基酸工具头

B6 has multiple dietary forms: pyridoxine (plant), pyridoxal, pyridoxamine (animal). In the body they are unified into the active coenzyme pyridoxal phosphate (PLP).

PLP is unique in its ability to form a covalent intermediate (Schiff base) with an amino acid's α-amino group, then drive different reactions depending on the enzyme:

Transamination: transfers the amino group from one amino acid to an α-keto acid → synthesizes a new amino acidDecarboxylation: removes CO₂, common in neurotransmitter synthesisTranssulfuration: homocysteine → cysteineGlycogen phosphorylase: PLP is a prosthetic group, driving muscle glycogen breakdown
If protein is bricks, B6/PLP is the toolbox that decides how these bricks are dismantled, swapped, and reassembled.

Read story Open mechanism

Educational content, not medical advice — consult a clinician.

Back

Vitamin B6

维生素 B6

Place · Level 3

PLP 是氨基酸交通枢纽 · 连接蛋白、神经递质和糖原动员

Connected to · 4

synergy · 1

Vitamin B12
B12 + folate run remethylation; B6 routes Hcy to transsulfuration. Any one short and Hcy rises.

cofactor · 2

Folate
PLP runs SHMT (serine ↔ glycine + 5,10-methylene-THF) and Hcy transsulfuration. Folate and B6 occupy two sides of the same junction.
Protein
What the body lacks is never the amino group but the carbon skeletons of the 9 essential amino acids: transaminases move an amino group from one molecule to another all day, and the coenzyme doing it is PLP, the active form of B6.

regulates · 1

Menstrual Cycle
B6 has limited but real evidence for premenstrual symptoms. It is also one of the few water-soluble vitamins that harms when overdone — chronic intake above 100 mg/day risks peripheral neuropathy. Remember both ends of this line.

PLP: the amino-acid toolhead

Stop 1/5

PLP · 氨基酸工具头

B6 has multiple dietary forms: pyridoxine (plant), pyridoxal, pyridoxamine (animal). In the body they are unified into the active coenzyme pyridoxal phosphate (PLP).

PLP is unique in its ability to form a covalent intermediate (Schiff base) with an amino acid's α-amino group, then drive different reactions depending on the enzyme:

Transamination: transfers the amino group from one amino acid to an α-keto acid → synthesizes a new amino acidDecarboxylation: removes CO₂, common in neurotransmitter synthesisTranssulfuration: homocysteine → cysteineGlycogen phosphorylase: PLP is a prosthetic group, driving muscle glycogen breakdown
If protein is bricks, B6/PLP is the toolbox that decides how these bricks are dismantled, swapped, and reassembled.

Read story Open mechanism

Educational content, not medical advice — consult a clinician.