Effect of Soy Protein Products on Growth and Metabolism of , , and

Overview

Journal Foods

Specialty Biotechnology

Date 2024 May 25

PMID 38790825

Authors

Wei Wen

Miao Hu

Yaxin Gao

Pengfei Zhang

Weimin Meng

Fengxia Zhang

Bei Fan

Fengzhong Wang

Shuying Li

Affiliations

Soon will be listed here.

Abstract

Microbial nitrogen sources are promising, and soy protein as a plant-based nitrogen source has absolute advantages in creating microbial culture medium in terms of renewability, eco-friendliness, and greater safety. Soy protein is rich in variety due to different extraction technologies and significantly different in the cell growth and metabolism of microorganisms as nitrogen source. Therefore, different soy proteins (soy meal powder, SMP; soy peptone, SP; soy protein concentrate, SPC; soy protein isolate, SPI; and soy protein hydrolysate, SPH) were used as nitrogen sources to culture , , and to evaluate the suitable soy nitrogen sources of the above strains. The results showed that had the highest bacteria density in SMP medium; had the highest bacteria density in SPI medium; and had the highest PMV in SPI medium. Nattokinase activity was the highest in SP medium; the bacteriostatic effect of nisin was the best in SPI medium; and the clavulanic acid concentration was the highest in SMP medium. Based on analyzing the correlation between the nutritional composition and growth metabolism of the strains, the results indicated that the protein content and amino acid composition were the key factors influencing the cell growth and metabolism of the strains. These findings present a new, high-value application opportunity for soybean protein.

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