). AMINO ACID COMPOSITION AND ANTIOXIDANT PROPERTIES OF FIVE EDIBLE MUSHROOM SPECIES FROM KASTAMONU, TURKEY

Background: Hydnum repandum, Cantharellus cibarius, Ramaria fennica, Boletus edulis, and Craterellus cornucopioides are all wild edible mushroom species from the Kastamonu province. The aim of this study was to investigate antioxidant properties and amino acid contents of these mushrooms. Materials and Methods: The mushrooms were analyzed for their free amino acid compositions using a high performance Amino Acid analyzer (Biochrom 30). Also, antioxidant activity and total phenolic concentrations of five different mushroom species were studied by using spectrophotometric methods. Results: The mushrooms contained 17 amino acids (g/100 g): Glutamic acid (2.56–1.11), Alanine (1.49–0.54), Arginine (1.62–6.77), Aspartic acid (1.45–0.81), Leucine (1.08–0.64), Methionine (1.05–0.06), Valine (1.05–0.66), Lysine (1.01–0.57), Serine (0.68–0.38), Cysteine (0.88–0.11), Isoleucine (0.61–0.39), Glycine (0.82–0.35), Threonine (0.82–0.44), Phenylalanine (0.66–0.42), Proline (0.60–0.47), Tyrosine (0.58–0.38), and Histidine (0.48–0.22). The total free amino acid (TAA) contents ranged from 169.2 mg/g in Boletus edulis to 89.1 mg/g in Hydnum repandum. These five different mushroom species contain eight essential amino acid species except tryptophan. The antioxidant activity of mushroom extracts was expressed as the percentage of DPPH radical inhibition and IC50 values (mg/mL). The percentage of inhibition ranged from 2.38% to 88.05% and IC50 values ranged from 0.03 to 13.98 mg/mL. The total phenolic content ranged from 0.66 to 7.74 mg/g of dry mushroom extract, expressed as gallic acid equivalents. Conclusion: Methanolic extract of Boletus edulis showed the highest phenolic content and strong antioxidant activity. As a result, the significant linear correlation between the values for the total phenolic content and antioxidant activity of mushroom extracts was corroborated in all of the investigated mushroom species, with the exception of Craterellus cornucopioides.

Download Full-text

Effect of Membrane Processing on Amino Acid Composition and Antioxidant Properties of Marble Vine Seed (Dioclea reflexa) Protein Hydrolysate

Journal of Food Processing and Preservation ◽

10.1111/jfpp.12917 ◽

2016 ◽

Vol 41 (3) ◽

pp. e12917 ◽

Cited By ~ 2

Author(s):

Adedamola I. Akinyede ◽

Abraham T. Girgih ◽

Oluwatooyin F. Osundahunsi ◽

Tayo N. Fagbemi ◽

Rotimi E. Aluko

Keyword(s):

Amino Acid ◽

Amino Acid Composition ◽

Acid Composition ◽

Protein Hydrolysate ◽

Antioxidant Properties ◽

Membrane Processing

Download Full-text

Extraction of proteins from two marine macroalgae, Ulva sp. and Gracilaria sp., for food application, and evaluating digestibility, amino acid composition and antioxidant properties of the protein concentrates

Food Hydrocolloids ◽

10.1016/j.foodhyd.2018.07.047 ◽

2019 ◽

Vol 87 ◽

pp. 194-203 ◽

Cited By ~ 32

Author(s):

Meital Kazir ◽

Yarden Abuhassira ◽

Arthur Robin ◽

Omri Nahor ◽

Jincheng Luo ◽

...

Keyword(s):

Amino Acid ◽

Amino Acid Composition ◽

Acid Composition ◽

Antioxidant Properties ◽

Marine Macroalgae ◽

Protein Concentrates

Download Full-text

Physico-chemical, amino acid composition, functional and antioxidant properties of roe protein concentrates obtained from Channa striatus and Lates calcarifer

Food Chemistry ◽

10.1016/j.foodchem.2011.11.055 ◽

2012 ◽

Vol 132 (3) ◽

pp. 1171-1176 ◽

Cited By ~ 17

Author(s):

Narsing Rao Galla ◽

Balaswamy Karakala ◽

Satyanarayana Akula ◽

Prabhakara Rao Pamidighantam

Keyword(s):

Amino Acid ◽

Amino Acid Composition ◽

Acid Composition ◽

Antioxidant Properties ◽

Lates Calcarifer ◽

Channa Striatus ◽

Protein Concentrates ◽

Physico Chemical

Download Full-text

Profiling of Silk Sericin from Cocoons of Three Southern African Wild Silk Moths with a Focus on Their Antimicrobial and Antioxidant Properties

Materials ◽

10.3390/ma13245706 ◽

2020 ◽

Vol 13 (24) ◽

pp. 5706

Author(s):

Kanono Comet Manesa ◽

Temesgen Girma Kebede ◽

Simiso Dube ◽

Mathew Muzi Nindi

Keyword(s):

Amino Acid ◽

Amino Acid Composition ◽

Acid Composition ◽

Antioxidant Properties ◽

Gram Positive ◽

Antioxidant Power ◽

Silk Sericin ◽

Gram Positive Bacteria ◽

Chemical Structures ◽

The Relationship

Silk sericin was extracted from the cocoons of three Southern African wild silk moth species, namely Gonometapostica, G. rufobrunnae (Lepidoptera: Lasiocampidae), and Argema mimosae (Lepidoptera: Saturniidae); these three sericin extracts were analysed to determine the relationship that exists between their chemical structures and their functional properties. The relationship was investigated by utilising several methods that include the determination of the amino acid composition, and characterisation of the secondary structures with Fourier transformation infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The antibacterial properties of these three sericin extracts were evaluated by an agar well diffusion assay with three Gram-positive bacteria (Bacillus subtilis, Staphylococcus aureus, and Staphylococcus epidermidis) as test microorganisms; and, lastly, the antioxidant properties of the three sericin extracts were determined using several scavenging methods that include the 2,2-diphenyl-1-picrylhydrazyl radical (DPPH), 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS˙+), and the ferric reducing antioxidant power (FRAP) assay. The amino acid composition in the silk sericin extracts from G. postica, G. rufobrunnea, and Argema mimosa in terms of the polar/non-polar ratio (P/NP) was found to be 65:35, 56:44, and 59:41, respectively. The FTIR spectra of these three silk sericin extracts showed distinct major bands such as amide A (3265 cm−1), amide B (3062 cm−1), amide I (1644 cm−1), amide II (1538 cm−1), and amide III (1244 cm−1). The XRD patterns of the silk sericin extracts revealed both amorphous and α-helical structures, with small crystalline regions. All three silk sericin extracts presented potent antibacterial efficacy against the three Gram-positive bacteria and were found to have excellent antioxidant activities against the tested free radicals.

Download Full-text