Extracellular activity of proteases from Yarrowia lipolytica IPS21 as a function of the carbon and nitrogen source

Abstract

The yeast strain Yarrowia lipolytica IPS 21 was tested for its ability to produce the protease enzyme on analytically pure carbon sources as well as on waste carbon sources. It was confirmed that the yeast Y. lipolytica IPS21 can have a higher proteolytic activity in the presence of waste carbon sources in chrome-tanned leather shavings (CTLS) than on yeast extract alone. This is confirmed by the high concentration of amino acids in samples with CTLS, suggesting increased degradation of CTLS by Y. lipolytica or secretion of proteases into the medium. It was also confirmed that metals accumulate mainly in the biomass and not in the supernatant. The biomass was also found to contain high levels of Ca, K and P, which are essential for plant growth. These results show that Y. lipolytica strain IPS21 can be used for the production of extracellular alkaline proteases and for the degradation of protein waste.

Use of Biostimulants in Energy Crops as a New Approach for the Improvement of Performance Sequestration CO2

“…In the developed method, targeted expression of alkaline proteases is employed in a one-step process at the culture stage, as depicted in Figure 3. Łukasiewicz Research Network-Lodz Institute of Technology has developed an alternative method for treating tannery waste [127,128] that does not require the use of pure enzymes and chemical reagents. Consequently, the conditions were selected that had the greatest impact on proteolytic activity while having the least impact on yeast cells of the genus Yarrowia.…”