The invention provides application of UBR5 in preparation of drugs for treating pigmented
skin diseases, and further the pigmented
skin diseases comprise various types of pigmented
nevus (mainly congenital pigmented
nevus and megalous with the risk of
malignant transformation). Various
pigmented spots (mainly chloasma, freckles, Taitian
nevus, post-
inflammation hyperpigmentation and the like) and
hypopigmentation /
depigmentation spots (mainly leucoderma, post-
inflammation hypopigmentation and the like). Experimental results show that UBR5 is highly expressed in
disease tissues such as pigmented nevus. The UBR5 expression level and the melanogenesis ability are in significant
positive correlation, targeted knockout / knockdown of UBR5 in melanocytes can significantly inhibit the expression level of melanogenesis related genes such as MITF, TRP1, TRP2, TYR and other proteins, the
melanin content of melanocytes and
tyrosinase activity, vice versa, and the melanogenesis ability of melanocytes after overexpression of UBR5 is significantly increased.