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Khedr M, Youssef FS, El-Kattan N, Abozahra MS, Selim MN, Yousef A, Khalil KMA, Mekky AE. FolE gene expression for folic acid productivity from optimized and characterized probiotic Lactobacillus delbrueckii. J Genet Eng Biotechnol 2023; 21:169. [PMID: 38108957 PMCID: PMC10728034 DOI: 10.1186/s43141-023-00603-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 11/14/2023] [Indexed: 12/19/2023]
Abstract
BACKGROUND Lactobacillus delbrueckii was one of the most common milk lactic acid bacterial strains (LAB) which characterized as probiotic with many health influencing properties. RESULTS Among seven isolates, KH1 isolate was the best producer of folic acid with 100 µg/ml after 48 h of incubation; FolE gene expression after 24 h of incubation was in the highest value in case of KH1 with three folds. Lactose was the best carbon source for this KH1, besides the best next isolates KH80 and KH98. The selected three LAB isolates were identified through 16S rDNA as Lactobacillus delbrueckii. These three isolates have high tolerance against acidic pH 2-3; they give 45, 10, and 22 CFUs at pH 3, besides 9, 6, and 4 CFUs at pH2, respectively. They also have resistance against elevated bile salt range 0.1-0.4%. KH1 recorded 99% scavenging against 97.3% 1000 µg/ml ascorbic acid. Docking study exhibits the binding mode of folic acid which exhibited an energy binding of - 8.65 kcal/mol against DHFR. Folic acid formed four Pi-alkyl, Pi-Pi, and Pi-sigma interactions with Ala9, Ile7, Phe34, and Ile60. Additionally, folic acid interacted with Glu30 and Asn64 by three hydrogen bonds with 1.77, 1.76, and 1.96 Å. CONCLUSION LAB isolates have probiotic properties, antioxidant activity, and desired organic natural source for folic acid supplementation that improve hemoglobin that indicated by docking study interaction.
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Affiliation(s)
- Mohamed Khedr
- Department of Botany and Microbiology, Faculty of Science, Al-Azhar University, Nasr, 11884, Cairo, Egypt.
| | - Fady Sayed Youssef
- Department of Pharmacology Faculty of Veterinary Medicine, Cairo University, Giza, 1221, Egypt
| | - Noura El-Kattan
- Department of Microbiology, Research Institute of Medical Entomology, General Organization for Teaching Hospitals and Institutes, Giza, Egypt
| | - Mahmoud S Abozahra
- Department of Botany and Microbiology, Faculty of Science, Al-Azhar University, Nasr, 11884, Cairo, Egypt
| | - Mohammed N Selim
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, FL, 33433, USA
- Microbial Chemistry Department, National Research Centre, 33 El-Buhouth Street, Dokki, 12622, Cairo, Egypt
| | - Abdullah Yousef
- Basic & Medical Sciences Department, Faculty of Dentistry, Alryada University for Science & Technology, Al ryada, Egypt
| | - Kamal M A Khalil
- Genetic Engineering and Biotechnology Division, Genetics and Cytology Department, National Research Centre, 33 El-Buhouth Street, Dokki, 12622, Cairo, Egypt
| | - Alsayed E Mekky
- Department of Botany and Microbiology, Faculty of Science, Al-Azhar University, Nasr, 11884, Cairo, Egypt
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Choi I, Choi H, Lee JS, Han J. Novel color stability and colorimetry-enhanced intelligent CO 2 indicators by metal complexation of anthocyanins for monitoring chicken freshness. Food Chem 2023; 404:134534. [PMID: 36242957 DOI: 10.1016/j.foodchem.2022.134534] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/22/2022] [Accepted: 10/04/2022] [Indexed: 11/22/2022]
Abstract
This study aims to improve the color stability of anthocyanins and develop a CO2-sensitive indicator based on black goji anthocyanin (BGA) extract. Although the BGA extracts showed distinct color changes, such as red-purple-blue, their intrinsic color diminished after 24 h. A metal complexation method was used for the high color stability of BGA. BGA extracts were chelated with various concentrations of Al3+ [0 - 20% (w/w)]. It showed high color stability and strong intensity in a dose-dependent manner. A CO2-sensitive indicator sachet was developed using hydroxypropyl methylcellulose hydrogel, based on 5% (w/w) Al3+-BGA complexes. The indicator was applied to the chicken breast and detected its spoilage after 3 days with its changing color to greyish blue, due to the microbial growth to 7.00 log CFU/g. These results demonstrated the possibility of chelated anthocyanin complexes as indicating dyes and the ability to monitor the food quality changes through noticeable color changes.
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Affiliation(s)
- Inyoung Choi
- Institute of Control Agents for Microorganisms, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Hyelin Choi
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Jung-Soo Lee
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Jaejoon Han
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea; Department of Food Biosciences and Technology, College of Life Sciences and Biotechnology, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
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