The invention belongs to the technical field of biological medicines, and particularly discloses a polypeptide with
malassezia resisting activity and application of the polypeptide in improvement of
seborrheic dermatitis. The polypeptide provided by the invention comprises an
amino acid sequence as shown in SEQ ID NO: 1. The polypeptide has a remarkable inhibiting effect on the key pathogenic bacterium-
malassezia causing
seborrheic dermatitis, experimental data shows that the polypeptide can remarkably inhibit the growth and constant value of the
malassezia at a low concentration, and the effect of the polypeptide can be close to that of a
positive control ketoconazole. The polypeptide shows an excellent
dermatophyte removing effect in a malassezia induced mouse
seborrheic dermatitis model, experimental data proves that the fungal load of the
skin tissue of the affected part of a mouse is remarkably reduced after administration, and the polypeptide still can keep high
biological activity and stability in a complex
skin physiological microenvironment, and has a good application prospect. The malassezia can effectively penetrate through a sebum layer to act on thalli, so that the
decomposition effect of the malassezia on sebum is effectively restrained.