Factors increasing poly-γ-glutamic acid content of cheongguk-jang fermented by Bacillus subtilis 168

Food Science and Biotechnology
Pov Ratha, Deok-Young Jhon

Abstract

Cheongguk-jang is a Korean traditional food produced by natural fermentation of boiled soybean. In cheongguk-jang, bacilli are dominant bacteria and produce highly viscous poly-γ-glutamic acid (γ-PGA), which improves human health functions. The purpose of this experiment was to find maximum production condition for the γ-PGA content during fermentation of cheongguk-jang with Bacillus subtilis 168. The most viscous cheongguk-jang was produced when soybean was cooked at 121 °C for 60 min in the presence of 50%(w/w) added water, followed by fermentation at 40 °C for 2 days. Additional conditions for maximum production of γ-PGA were the addition of 0.1%(w/w) FeCl3·6H2O, 3.0%(w/w) lactose and 3.0%(w/w) yeast extract as nutrients of inorganic salts, carbon source and nitrogen source, respectively. The three conditions did not show cumulative effect on the γ-PGA production and the addition of iron salt induced the most γ-PGA (0.97 ± 0.05%(w/w)), which corresponded to 2.7 times of the content in control cheongguk-jang.

References

May 2, 2001·Bioscience, Biotechnology, and Biochemistry·H TanimotoT Noguchi
Jan 10, 2002·Applied Microbiology and Biotechnology·M AshiuchiH Misono
Feb 25, 2003·Biotechnology and Bioengineering·Andrew Richard, Argyrios Margaritis
Jul 10, 2007·The Journal of Immunology : Official Journal of the American Association of Immunologists·Tae Woo KimHaryoung Poo
Jul 26, 2008·Journal of Industrial Microbiology & Biotechnology·I B BajajR S Singhal
Aug 1, 2008·Applied Biochemistry and Biotechnology·Jie ChenPeilin Cen
Nov 14, 2008·Applied Biochemistry and Biotechnology·Ishwar B Bajaj, Rekha S Singhal
Jun 15, 2013·Mediators of Inflammation·Munkhtugs DavaatserenMi Jeong Sung
Aug 9, 2013·Bioscience, Biotechnology, and Biochemistry·Eun-Hei LeeBae-Hwan Kim
Apr 10, 2015·International Journal of Molecular Sciences·Eun Ju ShinJin-Taek Hwang
Jan 1, 1992·Bioscience, Biotechnology, and Biochemistry·A Goto, M Kunioka
Jul 14, 2017·Journal of Biological Engineering·Lena Regestein Née MeissnerJochen Büchs
Sep 7, 2017·World Journal of Microbiology & Biotechnology·Sarote SirisansaneeyakulYusuf Chisti

❮ Previous
Next ❯

Citations

Jun 3, 2021·International Journal of Molecular Sciences·Il-Sup KimCheorl-Ho Kim
Aug 5, 2021·Trends in Food Science & Technology·Gitishree DasJayanta Kumar Patra

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.