The present invention is related to a fungal serine protease enzyme useful in modification, degradation or removal of proteinaceous material, which enzyme comprises an amino acid sequence of the mature Tr Prb 1 enzyme having an amino acid sequence of SEQ ID NO: 10 or a variant thereof having similar activity. The serine protease is obtainable from Trichoderma. Also disclosed are nucleic acid sequences encoding said protease, such as plasmid pALK2650 comprising the nucleotide sequence SEQ ID NO: 10 of the full length enzyme deposited in E. coli RF8052 under accession number DSM 22635. Said protease is useful as an enzyme preparation applicable in detergent compositions and for treating fibers, for treating wool, for treating hair, for treating leather, for treating food or feed, or for any applications involving modification, degradation or removal of proteinaceous material at low or moderate temperature ranges.
