This is a copper-containing oxidase that functions in the formation of pigments such as melanins and other polyphenolic compounds. Catalyzes the initial and rate limiting step in the cascade of reactions leading to melanin production from tyrosine. In addition to hydroxylating tyrosine to DOPA (3,4-dihydroxyphenylalanine), also catalyzes the oxidation of DOPA to DOPA-quinone, and possibly the oxidation of DHI (5,6-dihydroxyindole) to indole-5,6 quinone. Defects in TYR are the cause of albinism oculocutaneous type 1B (OCA1B) [MIM:606952]; also known as albinism yellow mutant type. An autosomal recessive disorder in which the biosynthesis of melanin pigment is reduced in skin, hair, and eyes. It is characterized by partial lack of tyrosinase activity.
Background References
1. Pedrosa TD et al. Anti-wrinkle and anti-whitening effects of jucá (Libidibia ferrea Mart.) extracts. Arch Dermatol Res 308:643-654 (2016).
2. Mathieu MG et al. The helicase HAGE prevents interferon-a-induced PML expression in ABCB5+ malignant melanoma-initiating cells by promoting the expression of SOCS1. Cell Death Dis 5:e1061 (2014).
Western blot analysis of Tyrosinase on SK-MEL-28 cell lysates with Rabbit anti-Tyrosinase antibody (ET1704-18) at 1/2,000 dilution.
Lysates/proteins at 20 µg/Lane.
Predicted band size: 60 kDa Observed band size: 60 kDa
Exposure time: 46 seconds; ECL: K1802;
4-20% SDS-PAGE gel.
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (ET1704-18) at 1/2,000 dilution was used in 5% NFDM/TBST at 4℃ overnight. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1/50,000 dilution was used for 1 hour at room temperature.
Western blot analysis of Tyrosinase on B16F1 cell lysates. Proteins were transferred to a PVDF membrane and blocked with 5% BSA in PBS for 1 hour at room temperature. The primary antibody (ET1704-18, 1/500) was used in 5% BSA at room temperature for 2 hours. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1:200,000 dilution was used for 1 hour at room temperature.
Immunocytochemistry analysis of SK-MEL-28 cells labeling Tyrosinase with Rabbit anti-Tyrosinase antibody (ET1704-18) at 1/100 dilution.
Cells were fixed in 4% paraformaldehyde for 15 minutes at room temperature, permeabilized with 0.1% Triton X-100 in PBS for 15 minutes at room temperature, then blocked with 1% BSA in 10% negative goat serum for 1 hour at room temperature. Cells were then incubated with Rabbit anti-Tyrosinase antibody (ET1704-18) at 1/100 dilution in 1% BSA in PBST overnight at 4 ℃. Goat Anti-Rabbit IgG H&L (iFluor™ 488, HA1121) was used as the secondary antibody at 1/1,000 dilution. PBS instead of the primary antibody was used as the secondary antibody only control. Nuclear DNA was labelled in blue with DAPI.
Beta tubulin (HA601187, red) was stained at 1/100 dilution overnight at +4℃. Goat Anti-Mouse IgG H&L (iFluor™ 594, HA1126) was used as the secondary antibody at 1/1,000 dilution.
Application: Immunohistochemistry (IHC-P)
Species: Human Tissue: Melanoma Sample: Paraffin-embedded section
Wash buffer: 1× TBST Endogenous peroxidase blocking: 3% H₂O₂, 10 minutes at room temperature. Blocking: 1% BSA + 10% normal goat serum, 10 minutes at room temperature. Primary antibody: ET1704-18, 1/5,000, 1 hour at room temperature. Secondary antibody: HA1119, 20 minutes at room temperature.
Negative expression of Tyrosinase protein in liver is consistent with the predicted expression pattern.
Tyrosinase was immunoprecipitated from 0.2 mg SK-MEL-28 cell lysate with ET1704-18 at 2 µg/10 µl beads. Western blot was performed from the immunoprecipitate using ET1704-18 at 1/2,000 dilution. HRP Conjugated Anti-Rabbit IgG for IP Nano-secondary antibody at 1/5,000 dilution was used for 1 hour at room temperature.
Lane 1: SK-MEL-28 cell lysate (input) Lane 2: ET1704-18 IP in SK-MEL-28 cell lysate Lane 3: Rabbit IgG instead of ET1704-18 in SK-MEL-28 cell lysate
Flow cytometric analysis of SK-MEL-28 cells labeling Tyrosinase.
Cells were washed twice with cold PBS and resuspend. Then stained with the primary antibody (ET1704-18, 1/1,000) (red) compared with Rabbit IgG Isotype Control (green). After incubation of the primary antibody at +4℃ for an hour, the cells were stained with a iFluor™ 488 conjugate-Goat anti-Rabbit IgG Secondary antibody (HA1121) at 1/1,000 dilution for 30 minutes at +4℃. Unlabelled sample was used as a control (cells without incubation with primary antibody; black).
Please note: All products are "FOR RESEARCH USE ONLY AND ARE NOT INTENDED FOR DIAGNOSTIC OR THERAPEUTIC USE"