Isolation and characterization of Trichoderma harzianum L-methioninase with promising a powerful anticancer

Bioactive components derived from medicinal herbs have recently acquired popularity due to their efficacy in treating various ailments, including cancer and infectious diseases. In this study, the anticancer enzyme, L-methioninase isolated from medicinal plants endophytic fungi, then evaluated its promising therapeutic agents against different types of human cancers. L methionine was purified using column chromatography with the stationary phase of Sephadex G-200 with 6.6-fold purification, which increased the specific activity of 71.3 U/mg of protein with a recovery rate of 48.2 %. On the SDS-PAGE chromatogram, the apparent molecular mass of the isolated enzyme was 48 kDa, and its highest activity was observed at pH 8 and 35 °C. The enzyme was catalytically stable within the pH range of 6.0-9.0 and below 40 °C. This study demonstrates that isolated L-methioninase is particularly efficient against tumour cell lines in vitro. The crude and purified L-methioninase inhibited 60 and 80 % of the growth of the breast cancer cell line (MCF-7), respectively, with an estimated IC₅₀ = 12.6 μg/ml (crude) and IC₅₀ = 5.0 μg/ml for purified L-methioninase from isolate 8 with accession no MZ675362. Because of this, pure L-methioninase has better catalytic characteristics and significant thermal stability, which could be used as a cancer-fighting substance than the enzyme purified from other sources.