Name | TYROSINASE |
Synonyms | TYROSINASE exMushroom TyrosinaseExMushroom PHENOLASE FROM POTATO AGARICUSBISPORUSTYROSINASE Polyphenol Oxidase from Mushrooms |
CAS | 9002-10-2 |
EINECS | 232-653-4 |
Melting Point | 89-94 °C |
Appearance | lyophilized powder |
Storage Condition | -20°C |
MDL | MFCD00082118 |
Use | Overview tyrosinase has a β-sheet (yellow element of the Secsine part) at the N-terminus and C- terminus, respectively, with several α-helices between the N-terminus and the C- terminus, such a structure facilitates tyrosinase formation of the active center. tyrosinase (tyrosinase,EC 1. 14. 18. 1) widely distributed in microorganisms, animals and plants and the human body, in plants, tyrosinase is generally called polyphenol oxidase; In insects, it is generally called phenol oxidase; In microorganisms and the human body, it is called tyrosinase. Tyrosinase is a key enzyme in the synthesis of melanin and browning of fruits and vegetables. It plays an important role in the tanning process and wound healing of insects. Bacterial melanin can protect bacterial cells and spores from ultraviolet radiation. Tyrosinase has the dual catalytic function of monophenolase and diphenolase. Under the action of monophenolase, tyrosine is hydroxylated into L-dopa (L-DOPA), LDOPA is oxidized to dopa quinone, which undergoes a series of reactions to form melanin. Tyrosinase is abnormal, which may cause melanoma and early-onset Alzheimer's disease. Pigmentation caused by abnormal melanin production is an important manifestation of animal aging and browning of fruits and vegetables. Tyrosinase inhibitors are widely used in many fields, such as beauty and health care, pigment skin disease treatment, pest control and food preservation. |
Hazard Symbols | Xn - Harmful |
Risk Codes | 42 - May cause sensitization by inhalation |
Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
WGK Germany | 2 |
FLUKA BRAND F CODES | 10-21 |
dangerous goods mark | Xn |
hazard category code | 42 |
safety instructions | 22-24/25-45 |
WGK Germany | 2 |
F | 10-21 |
melting point | 89-94 °C |
storage conditions | -20°C |
morphology | lyophilized powder |
EPA chemical information | Oxygenase, monophenol mono- (9002-10-2) |
How does tyrosinase produce melanin
Tyrosinase (TYR) is a copper-containing enzyme that exists in plant and animal tissues and catalyzes the production of melanin and other pigments from the oxidation of tyrosine, such as exposing peeled or sliced potatoes to blacken in the air. Tyrosinase can be found in the melanosome of skin melanocytes. Human skin turns brown or black when exposed to sunlight is due to the activation of tyrosinase under ultraviolet radiation, which catalyzes the hydroxylation of tyrosine in the body to form dopa, and then oxidizes dopa into dopa. After a series of complex reactions, melanin is finally formed.
Factors affecting tyrosinase activity
1. if patients receive strong light exposure for a long time, a large amount of ultraviolet rays will enter the skin epidermis, inhibit tyrosinase activity, and then lead to melanin loss.
2. If the number of copper ions in patients decreases, it will affect the body's metabolism and the body's endocrine system, thereby affecting tyrosinase activity.
3. The increase of tryptophan and arsenic enzyme activity will inhibit tyrosinase activity, and excessive cysteine, glutathione and tryptophan accumulated in the body due to metabolic disorders will also increase the activity of tryptophan and affect the synthesis of melanin through its reduction effect.
How to increase tyrosinase activity?
The activity of tyrosinase is closely related to copper, iron, zinc and other elements in the human body. Therefore, patients with vitiligo can appropriately eat substances rich in tyrosine and rare elements zinc, copper, and iron to restore tyrosinase activity and help melanocytes produce. For example, animal offal, crustaceans, beans, lentils, green beans, red beans, hard-shelled peanuts, walnuts, black sesame and raisins.