Enzymatic decolorization of melanin by lignin peroxidase from Phanerochaete chrysosporium

Scientific Reports
Beenish SadaqatZaixing Huang

Abstract

Skin darkening results as a consequence of the accumulation of skin pigment melanin. To combat this, the amplitude of skin lightening agents are commercially available, most of which inhibit melanin synthesis. Decolorization of melanin is an alternative method of skin lightening. In this study, we show that lignin peroxidase (LiP), an extracellular enzyme purified from Phanerochaete chrysosporium NK-1 isolated from a forest soil can effectively degrade and decolorize melanin in vitro. Decolorization conditions including pH, temperature, incubation time, enzyme concentration, and mediator addition were investigated to optimize the reaction conditions. The results indicate that pH 3, 40 °C, 15 IU/ml, and 10 h incubation were the optimal conditions for the decolorization of the melanin. The use of the mediator, veratryl alcohol was also found effective to enhance the efficacy of the melanin decolonization, with up to 92% decolorization. The scanning electron microscopy results showed void spaces on the treated melanin granules as compared to the untreated sample, indicating the degradation of melanin. Changes in the fingerprint region of the melanin were observed. Between wavenumbers 1500-500 cm-1, for example, the presence of new...Continue Reading

References

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Datasets Mentioned

BETA
KX064682.1

Methods Mentioned

BETA
infrared
PCR
gel filtration
scanning electron microscopy

Software Mentioned

Molecular Evolutionary Genetic Analysis ( MEGA )
Design Expert
BLAST

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