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Maestrello V, Solovyev P, Stroppa A, Bontempo L, Franceschi P. 1H NMR profiling and chemometric analysis for ripening and production characterization of Grana Padano cheese. Food Chem 2024; 456:139986. [PMID: 38852457 DOI: 10.1016/j.foodchem.2024.139986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 05/23/2024] [Accepted: 06/03/2024] [Indexed: 06/11/2024]
Abstract
Grana Padano (GP) cheese is a renowned PDO Italian cheese whose nutritional characteristics and market price are influenced by the ripening stage. In this work, it was demonstrated that the combined use of untargeted 1H NMR profiling and chemometric analysis can be used as a powerful tool to quantitatively characterize GP ripening and production, focusing on both aqueous and lipid fractions. An initial exploratory analysis revealed substantial variations in the aqueous fraction attributable to aging time, year and season of production. Multivariate analysis was adopted to show these differences, mainly attributable to amino acids. In contrast, the lipid fraction analysis highlighted the impact of production season on fatty acid unsaturation, influenced by feed variations. As regards the production process, this study focuses on the variations induced by bactofugation. In this respect, the aqueous fraction was found to be extensively influenced by this centrifugation step, affecting compounds crucial to organoleptic characteristics.
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Affiliation(s)
- Valentina Maestrello
- Fondazione Edmund Mach (FEM), via E. Mach 1, 38098 San Michele all'Adige, Italy; University of Trento, via Mach 1, 38098 San Michele all'Adige, (TN), Italy.
| | - Pavel Solovyev
- Fondazione Edmund Mach (FEM), via E. Mach 1, 38098 San Michele all'Adige, Italy.
| | - Angelo Stroppa
- Consorzio Tutela Grana Padano, Via XXIV Giugno 8, 25015, San Martino Della Battaglia, Desenzano del Garda, BS, Italy.
| | - Luana Bontempo
- Fondazione Edmund Mach (FEM), via E. Mach 1, 38098 San Michele all'Adige, Italy
| | - Pietro Franceschi
- Fondazione Edmund Mach (FEM), via E. Mach 1, 38098 San Michele all'Adige, Italy
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2
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Stauß AC, Fuchs C, Jansen P, Repert S, Alcock K, Ludewig S, Rozhon W. The Ninhydrin Reaction Revisited: Optimisation and Application for Quantification of Free Amino Acids. Molecules 2024; 29:3262. [PMID: 39064842 PMCID: PMC11278723 DOI: 10.3390/molecules29143262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2024] [Revised: 07/05/2024] [Accepted: 07/09/2024] [Indexed: 07/28/2024] Open
Abstract
The ninhydrin reaction is commonly used for the detection of amino acids. However, in the literature, different conditions with respect to the buffer system, its pH and concentration, type of organic solvent, incubation time, and temperature, as well as the concentrations of the reagents, are described. To identify the most suitable conditions, colour development with reagents of varying compositions and different reaction temperatures and times were investigated using asparagine as a model amino acid. Asparagine was selected since it is one of the most abundant free amino acids in many types of samples. The optimal reaction mixture consisted of 0.8 mol L-1 potassium acetate, 1.6 mol L-1 acetic acid, 20 mg mL-1 ninhydrin and 0.8 mg mL-1 hydrindantin in DMSO/acetate buffer 40/60 (v/v) (final concentrations). The best reaction condition was heating the samples in 1.5 mL reaction tubes to 90 °C for 45 min. Afterwards, the samples were diluted with 2-propanol/water 50/50 (v/v) and the absorbance was measured at 570 nm. The proteinogenic amino acids showed a similar response except for cysteine and proline. The method was highly sensitive and showed excellent linearity as well as intra-day and inter-day reproducibility.
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Affiliation(s)
| | | | | | | | | | | | - Wilfried Rozhon
- Department of Agriculture, Ecotrophology, and Landscape Development, Anhalt University of Applied Sciences, 06406 Bernburg, Saxony-Anhalt, Germany; (A.C.S.); (C.F.); (P.J.); (S.R.); (K.A.); (S.L.)
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3
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Li D, Cui Y, Wu X, Li J, Min F, Zhao T, Zhang J, Zhang J. Graduate Student Literature Review: Network of flavor compounds formation and influence factors in yogurt. J Dairy Sci 2024:S0022-0302(24)00969-X. [PMID: 38945263 DOI: 10.3168/jds.2024-24875] [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: 03/05/2024] [Accepted: 06/02/2024] [Indexed: 07/02/2024]
Abstract
Yogurt is popular as a natural and healthy food, but its flavor greatly affects acceptability by consumers. Flavor compounds of yogurt is generally produced by the metabolism of lactose, protein and fat, and the resulting flavors include carbonyls, acids, esters and alcohols, etc. Each flavor compounds could individually provide the corresponding flavor, or it can be combined with other compounds to form a new flavor. The flavor network was formed among the metabolites of milk components, and acetaldehyde, as the central compounds, played a role in connecting the whole network. The flavor compounds can be affected by many factors, such as the use of different raw milks, ways of homogenization, sterilization, fermentation, post ripening, storage condition and packaging materials, etc., which can affect the overall flavor of yogurt. This paper provides an overview of the volatile flavor compounds in yogurt, the pathways of production of the main flavor compounds during yogurt fermentation, and the factors that influence the flavor of yogurt including type of raw milk, processing, and storage. It also tries to provide theoretical guidance for the product of yogurt in ideal flavor, but further research is needed to provide a more comprehensive description of the flavor system of yogurt.
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Affiliation(s)
- Die Li
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650550, China
| | - Yutong Cui
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650550, China
| | - Xinying Wu
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650550, China
| | - Jiyong Li
- Shangri-la Kangmei Dairy Products CO.\, Ltd., Diqing Prefecture 674400, China
| | - Fuhai Min
- Shangri-la Kangmei Dairy Products CO.\, Ltd., Diqing Prefecture 674400, China
| | - Tianrui Zhao
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650550, China
| | - Jianming Zhang
- Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, 310016, China.
| | - Jiliang Zhang
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650550, China.
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4
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Galli BD, Nikoloudaki O, Granehäll L, Carafa I, Pozza M, De Marchi M, Gobbetti M, Di Cagno R. Comparative analysis of microbial succession and proteolysis focusing on amino acid pathways in Asiago-PDO cheese from two dairies. Int J Food Microbiol 2024; 411:110548. [PMID: 38154252 DOI: 10.1016/j.ijfoodmicro.2023.110548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 11/18/2023] [Accepted: 12/17/2023] [Indexed: 12/30/2023]
Abstract
In this study, a comprehensive and comparative analysis was conducted on Italian Asiago-PDO cheese obtained from two different dairies named Dairy I and Dairy II using industrial and natural fermented milk, respectively. The analysis encompassed the evaluation of chemical composition, the succession of the microbiota during manufacture and ripening, and proteolysis mainly focusing on free individual amino acid (FAA) profiles. A metagenomic approach was used to investigate the cheese microbiome functionality. Differences in gross chemical composition were more evident during ripening, with Dairy II showing higher variability within batches. The microbiota varied significantly between the two dairies and ripening stages. The choice of starter culture shaped the microbiota during production and affected the microbial diversity of non-starter lactic acid bacteria (NSLAB) originated from the raw milk during ripening. Peptide chromatographic profiles and FAA concentrations increased as ripening progressed, with Dairy I showing higher production of FAA. Functional analysis of the metagenomes linked species to specific amino acid metabolism/catabolism pathways. The amino acid metabolism pathways, particularly those related to aromatic amino acids, lysine, and branched-chain amino acids, were affected by the presence of specific NSLAB species, which differed between the two dairies. The results obtained in this study reveal the impact of starter culture on peculiar cheese microbiota assemblies, which selectively targets amino acid pathways, providing insights into the potential flavor and aroma characteristics of Asiago-PDO cheese.
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Affiliation(s)
- Bruno Domingues Galli
- Free University of Bozen-Bolzano, Faculty of Agricultural, Environmental and Food Sciences, Piazza Università 1, 39100 Bolzano, BZ, Italy
| | - Olga Nikoloudaki
- Free University of Bozen-Bolzano, Faculty of Agricultural, Environmental and Food Sciences, Piazza Università 1, 39100 Bolzano, BZ, Italy.
| | - Lena Granehäll
- Free University of Bozen-Bolzano, Faculty of Agricultural, Environmental and Food Sciences, Piazza Università 1, 39100 Bolzano, BZ, Italy.
| | - Ilaria Carafa
- Free University of Bozen-Bolzano, Faculty of Agricultural, Environmental and Food Sciences, Piazza Università 1, 39100 Bolzano, BZ, Italy
| | - Marta Pozza
- University of Padova, Department of Agronomy, Food, Natural resources, Animals and Environment, Viale dell'Università 16, 35020 Legnaro, PD, Italy.
| | - Massimo De Marchi
- University of Padova, Department of Agronomy, Food, Natural resources, Animals and Environment, Viale dell'Università 16, 35020 Legnaro, PD, Italy.
| | - Marco Gobbetti
- Free University of Bozen-Bolzano, Faculty of Agricultural, Environmental and Food Sciences, Piazza Università 1, 39100 Bolzano, BZ, Italy.
| | - Raffaella Di Cagno
- Free University of Bozen-Bolzano, Faculty of Agricultural, Environmental and Food Sciences, Piazza Università 1, 39100 Bolzano, BZ, Italy.
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5
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Tondhoush A, Soltani M, Azarikia F, Homayouni‐Rad A, Karami M. Fabrication of UF-white cheese: Obtaining a different proteolysis rate, texture, and flavor via using combinations of mesophilic starter culture and Lactobacillus helveticus. Food Sci Nutr 2024; 12:328-339. [PMID: 38268878 PMCID: PMC10804073 DOI: 10.1002/fsn3.3769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 09/30/2023] [Accepted: 10/06/2023] [Indexed: 01/26/2024] Open
Abstract
The effect of using mesophilic starter culture (Lactococcus lactis ssp. lactis and Lactococcus lactis ssp. cremoris) and Lactobacillus helveticus (L. helveticus) at different ratios (100:0, 75:25, 50:50, 25:75, and 0:100) on the quality properties of UF-white cheese during 90 days of ripening was studied. The results revealed that an increase in L. helveticus ratio caused a significant decrease in the pH and total protein contents of the cheeses (p < .05). No significant changes were observed in the dry matter content of the cheeses (p > .05). The use of higher ratios of L. helveticus led to a noticeable increase in proteolysis and lipolysis indices in the cheeses (p < .05). The cheese produced with higher ratios of L. helveticus had less storage (G') and loss (G″) moduli compared to other cheeses. The more open structure was seen in the cheeses produced using higher ratios of L. helveticus. Regarding sensory properties, lower scores of body and texture, and higher scores of odor and flavor were assigned to the cheeses produced using higher ratios of L. helveticus. In conclusion, the use of combinations of mesophilic starter culture and L. helveticus at specific ratios (75:25 and 25:75) led to improve quality characteristics of UF-white cheese.
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Affiliation(s)
- Arash Tondhoush
- Department of Food Sciences and Technology, Faculty of Pharmacy, Tehran Medical SciencesIslamic Azad UniversityTehranIran
| | - Mostafa Soltani
- Department of Food Sciences and Technology, Faculty of Pharmacy, Tehran Medical SciencesIslamic Azad UniversityTehranIran
- Nutrition and Food Sciences Research Center, Tehran Medical SciencesIslamic Azad UniversityTehranIran
| | - Fatemeh Azarikia
- Department of Food Technology, Faculty of Agricultural Technology (Aburaihan)University of TehranTehranIran
| | - Aziz Homayouni‐Rad
- Department of Food Science and Technology, Faculty of Nutrition & Food SciencesTabriz University of Medical SciencesTabrizIran
| | - Mostafa Karami
- Department of Food Science and Technology, College of Food IndustryBu‐Ali Sina UniversityHamedanIran
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6
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Boran OS, Sulejmani E, Hayaloglu AA. Acceleration of proteolysis, flavour development and enhanced bioactivity in a model cheese using Kuflu cheese slurry: An optimisation study. Food Chem 2023; 412:135495. [PMID: 36731232 DOI: 10.1016/j.foodchem.2023.135495] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 01/11/2023] [Accepted: 01/14/2023] [Indexed: 01/19/2023]
Abstract
This study aimed to use Kuflu (a mould-ripened cheese) cheese slurry to accelerate ripening, improve biological activity and flavour development in a model cheese in terms of proteolysis and volatile compounds. Response surface methodology (RSM) was employed for the model cheese to determine higher proteolysis and volatile development level during ripening as a function of Kuflu cheese slurry addition level (0-5 %), salt concentration (1-3 %) and ripening temperature (5-15 °C). The highest aminopeptidase activities (0.140 and 0.187 OD/g per hour) were determined in 15-day-old samples containing 3 % and 5 % Kuflu cheese slurry, respectively. Also, the use of Kuflu cheese slurry, regardless of ripening, caused an increase in ABTS*+ antioxidants, angiotensin-converting enzyme (ACE)-inhibition activity and volatile compounds in model cheeses. The sensory evaluation indicated that the use of 3 % (w/w) Kuflu cheese slurry, storage temperature 10 °C for 15 days provided better flavour, odour, texture, colour, appearance and overall acceptability. In conclusion, using Kuflu cheese slurry for model cheese production enhanced the level of proteolysis and volatile flavour composition with shortened ripening time.
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Affiliation(s)
- O S Boran
- Department of Food Engineering, Inonu University, 44280 Malatya, Turkey
| | - E Sulejmani
- Department of Food Technology, University of Tetova, 1200 Tetovo, Macedonia
| | - A A Hayaloglu
- Department of Food Engineering, Inonu University, 44280 Malatya, Turkey.
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7
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Impact of LAB from Serpa PDO Cheese in Cheese Models: Towards the Development of an Autochthonous Starter Culture. Foods 2023; 12:foods12040701. [PMID: 36832776 PMCID: PMC9956040 DOI: 10.3390/foods12040701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 01/30/2023] [Accepted: 01/31/2023] [Indexed: 02/08/2023] Open
Abstract
Serpa is a protected designation of origin (PDO) cheese produced with raw ewes' milk and coagulated with Cynara cardunculus. Legislation does not allow for milk pasteurization and starter culture inoculation. Although natural Serpa's rich microbiota allows for the development of a unique organoleptic profile, it also suggests high heterogeneity. This raises issues in the final sensory and safety properties, leading to several losses in the sector. A possible solution to overcoming these issues is the development of an autochthonous starter culture. In the present work, some Serpa cheese Lactic acid bacteria (LAB)-isolated microorganisms, previously selected based on their safety, technological and protective performance, were tested in laboratory-scale cheeses. Their acidification, proteolysis (protein and peptide profile, nitrogen fractions, free amino acids (FAA)), and volatiles generation (volatile fatty acids (VFA) and esters) potential was investigated. Significant differences were found in all parameters analyzed, showing a considerable strain effect. Successive statistical analyses were performed to compare cheese models and Serpa PDO cheese. The strains L. plantarum PL1 and PL2 and the PL1 and L. paracasei PC mix were selected as the most promising, resulting in a closer lipolytic and proteolytic profile of Serpa PDO cheese. In future work, these inocula will be produced at a pilot scale and tested at the cheese level to validate their application.
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8
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Markers and Mechanisms of Deterioration Reactions in Dairy Products. FOOD ENGINEERING REVIEWS 2023. [DOI: 10.1007/s12393-023-09331-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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9
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Cao Y, Hu G, Li W, Wang J, Ge Y, Li F, Guo W, Kan X, Fu S, Liu J. Lysine promotes proliferation and β-casein synthesis through the SLC6A14-ERK1/2-CDK1-mTOR signaling pathway in bovine primary mammary epithelial cells. J Therm Biol 2022; 110:103375. [DOI: 10.1016/j.jtherbio.2022.103375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 10/18/2022] [Accepted: 10/19/2022] [Indexed: 11/06/2022]
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10
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Zhang X, Zheng Y, Feng J, Zhou R, Ma M. Integrated metabolomics and high-throughput sequencing to explore the dynamic correlations between flavor related metabolites and bacterial succession in the process of Mongolian cheese production. Food Res Int 2022; 160:111672. [DOI: 10.1016/j.foodres.2022.111672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 06/27/2022] [Accepted: 07/07/2022] [Indexed: 11/04/2022]
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11
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Araújo-Rodrigues H, Martins APL, Tavaria FK, Santos MTG, Carvalho MJ, Dias J, Alvarenga NB, Pintado ME. Organoleptic Chemical Markers of Serpa PDO Cheese Specificity. Foods 2022; 11:foods11131898. [PMID: 35804714 PMCID: PMC9265577 DOI: 10.3390/foods11131898] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 06/21/2022] [Accepted: 06/22/2022] [Indexed: 11/16/2022] Open
Abstract
Serpa is a protected designation of origin cheese produced with a vegetable coagulant (Cynara cardunculus L.) and raw ovine milk. Despite the unique sensory profile of raw milk cheeses, numerous parameters influence their sensory properties and safety. To protect the Serpa cheese quality and contribute to unifying their distinctive features, some rheologic and physicochemical parameters of cheeses from four PDO producers, in distinct seasons and with different sensory scores, were monitored. The results suggested a high chemical diversity and variation according to the dairy, month and season, which corroborates the significant heterogeneity. However, a higher incidence of some compounds was found: a group of free amino acids (Glu, Ala, Leu, Val and Phe), lactic and acetic acids, some volatile fatty acids (e.g., iC4, iC5, C6 and C12) and esters (e.g., ethyl butanoate, decanoate and dodecanoate). Through the successive statistical analysis, 13 variables were selected as chemical markers of Serpa cheese specificity: C3, C4, iC5, C12, Tyr, Trp, Ile, 2-undecanone, ethyl isovalerate, moisture content on a fat-free basis, the nitrogen-fractions (maturation index and non-protein and total nitrogen ratio) and G’ 1 Hz. These sensory markers’ identification will be essential to guide the selection and development of an autochthonous starter culture to improve cheese quality and safety issues and maintain some of the Serpa authenticity.
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Affiliation(s)
- Helena Araújo-Rodrigues
- CBQF—Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (H.A.-R.); (F.K.T.)
| | - António P. L. Martins
- Instituto Nacional de Investigação Agrária e Veterinária, Unidade de Tecnologia e Inovação, Avenida da República, Quinta do Marquês, 2780-157 Oeiras, Portugal; (A.P.L.M.); (N.B.A.)
- Geobiosciences, Geobiotechnologies and Geoengineering (GeoBioTec), Faculdade de Ciências e Tecnologias, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal;
| | - Freni K. Tavaria
- CBQF—Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (H.A.-R.); (F.K.T.)
| | - Maria Teresa G. Santos
- Escola Superior Agrária, Instituto Politécnico de Beja, Rua Pedro Soares, 7800-295 Beja, Portugal; (M.T.G.S.); (M.J.C.)
| | - Maria João Carvalho
- Escola Superior Agrária, Instituto Politécnico de Beja, Rua Pedro Soares, 7800-295 Beja, Portugal; (M.T.G.S.); (M.J.C.)
| | - João Dias
- Geobiosciences, Geobiotechnologies and Geoengineering (GeoBioTec), Faculdade de Ciências e Tecnologias, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal;
- Escola Superior Agrária, Instituto Politécnico de Beja, Rua Pedro Soares, 7800-295 Beja, Portugal; (M.T.G.S.); (M.J.C.)
| | - Nuno B. Alvarenga
- Instituto Nacional de Investigação Agrária e Veterinária, Unidade de Tecnologia e Inovação, Avenida da República, Quinta do Marquês, 2780-157 Oeiras, Portugal; (A.P.L.M.); (N.B.A.)
- Geobiosciences, Geobiotechnologies and Geoengineering (GeoBioTec), Faculdade de Ciências e Tecnologias, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal;
| | - Manuela E. Pintado
- CBQF—Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (H.A.-R.); (F.K.T.)
- Correspondence: ; Tel.: +351-2261-96200
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12
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Li S, Zhang Y, Li X, Yin P, Wang T, Li Y, Zhang K, Sheng H, Lu S, Ji H, Fan Z, Li B. The Effect of the Ratio of Gamma Aminobutyric Acid-Producing Saccharomyces cerevisiae DL6–20 and Kluyveromyces marxianus B13–5 Addition on Cheese Quality. Front Microbiol 2022; 13:900394. [PMID: 35814701 PMCID: PMC9260010 DOI: 10.3389/fmicb.2022.900394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Accepted: 05/23/2022] [Indexed: 11/13/2022] Open
Abstract
Kazakh cheese is a traditional dairy product in Xinjiang, China. The function and potential probiotic characteristics of Saccharomyces cerevisiae DL6–20 and Kluyveromyces marxianus B13–5 in Kazakh cheese and its contribution to cheese fermentation was studied. In this study, the effect of the addition ratio of gamma aminobutyric acid (GABA)-producing S. cerevisiae DL6–20 and K. marxianus B13–5 on cheese quality was investigated. Cheeses were prepared by fermentations with a total of six treatments: comercial culture alone as control (CS), a combination with one yeast, either; K. marxianus B13–5 (CSM); S. cerevisiae DL6–20 (CSS); and three different proportions of this two yeasts (CSM:CSS 1:1, 1:2, 2:1). We measured the GABA content of cheese, as well as basic physical and chemical indicators, microbial content, free amino acid (FAA) content, texture, and flavor compound content. The total FAA content of mixed bacteria fermentation was higher than that of the single bacteria alone. The GABA content CSM:CSS 1:2 GABA content was 0.114 g/100 g, CSM:CSS 2:1 GABA content was 0.12 g/100 g, CSM:CSS1:1 content of GABA produced in the late ripening period of cheese was the highest, reaching 0.189 g/100 g and the number of LAB and yeasts in CSM:CSS 1:1 was higher than that of other cheeses. The mixed-strain fermentation generally produced cheeses with a higher protein content than that of the single-strain fermentation in the late stage of the maturation process, especially the protein content of CSM:CSS 1:1 during the ripening period, when the protein content was highest at day 50. CSM:CSS 1:1 had a low moisture content, making it easy to store. With the exception of water and protein content, there is no significant difference in other physical and chemical indicators. CSM:CSS 1:1 contributed to the formation of cheese texture. In addition, multivariate statistical analysis indicated that mixed-strain fermentation was beneficial to the production of cheese aroma, with the aroma production performance of CSM:CSS 1:2 and CSM:CSS 2:1 found to be better than that of CSM: CSS 1:1.
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Affiliation(s)
- Shan Li
- School of Food Science and Technology, Key Laboratory of Xinjiang Phytomedicine Resource and Utilization of Ministry of Education, Shihezi University, Shihezi, China
- Henan Shuanghui Investment & Development Co., Ltd., Luohe, China
| | - Yan Zhang
- School of Food Science and Technology, Key Laboratory of Xinjiang Phytomedicine Resource and Utilization of Ministry of Education, Shihezi University, Shihezi, China
- Zhoukou Vocational College of Arts and Science, Zhoukou, China
| | - Xu Li
- School of Food Science and Technology, Key Laboratory of Xinjiang Phytomedicine Resource and Utilization of Ministry of Education, Shihezi University, Shihezi, China
- Guangdong Yikewei Biotech Co., Ltd., Guangzhou, China
| | - Pingping Yin
- School of Food Science and Technology, Key Laboratory of Xinjiang Phytomedicine Resource and Utilization of Ministry of Education, Shihezi University, Shihezi, China
| | - Tengbin Wang
- School of Food Science and Technology, Key Laboratory of Xinjiang Phytomedicine Resource and Utilization of Ministry of Education, Shihezi University, Shihezi, China
- Xinjiang Uygur Autonomous Region Analysis and Testing Research Institute, Xinjiang, China
| | - Yandie Li
- School of Food Science and Technology, Key Laboratory of Xinjiang Phytomedicine Resource and Utilization of Ministry of Education, Shihezi University, Shihezi, China
| | - Kaili Zhang
- School of Food Science and Technology, Key Laboratory of Xinjiang Phytomedicine Resource and Utilization of Ministry of Education, Shihezi University, Shihezi, China
| | - Huayang Sheng
- School of Food Science and Technology, Key Laboratory of Xinjiang Phytomedicine Resource and Utilization of Ministry of Education, Shihezi University, Shihezi, China
| | - Shiling Lu
- School of Food Science and Technology, Key Laboratory of Xinjiang Phytomedicine Resource and Utilization of Ministry of Education, Shihezi University, Shihezi, China
| | - Hua Ji
- School of Food Science and Technology, Key Laboratory of Xinjiang Phytomedicine Resource and Utilization of Ministry of Education, Shihezi University, Shihezi, China
| | - Zhexin Fan
- School of Food Science and Technology, Key Laboratory of Xinjiang Phytomedicine Resource and Utilization of Ministry of Education, Shihezi University, Shihezi, China
| | - Baokun Li
- School of Food Science and Technology, Key Laboratory of Xinjiang Phytomedicine Resource and Utilization of Ministry of Education, Shihezi University, Shihezi, China
- *Correspondence: Baokun Li,
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13
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Niro S, Fratianni A, Tremonte P, Lombardi SJ, Sorrentino E, Manzi P, Panfili G. Cis-trans retinol isomerisation: Influence of microorganisms during the production of pasta filata cheeses. Int Dairy J 2022. [DOI: 10.1016/j.idairyj.2022.105441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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14
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Functional Analysis of Feedback Inhibition-Insensitive Variants of N-Acetyl Glutamate Kinase Found in Sake Yeast Mutants with Ornithine Overproduction. Microbiol Spectr 2022; 10:e0082222. [PMID: 35543513 PMCID: PMC9241915 DOI: 10.1128/spectrum.00822-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
In the yeast Saccharomyces cerevisiae, N-acetyl glutamate kinase (NAGK), which catalyzes the phosphorylation of N-acetyl glutamate to form N-acetyl glutamyl-5-phosphate, is one of the rate-limiting enzymes in the ornithine and arginine biosynthetic pathways. NAGK activity is strictly regulated via feedback inhibition by the end product, arginine. We previously reported that the Thr340Ile variant of NAGK was insensitive to arginine feedback inhibition and that the interaction between Lys336 and Thr340 in NAGK may be important for arginine recognition. In the present study, we demonstrated that amino acid changes of Thr340 to Ala, Leu, Arg, Glu, Ile, and Asn removed arginine feedback inhibition, although the Thr340Ser variant was subject to the feedback inhibition. Therefore, these results indicate that the arginine-binding cavity formed via the interaction between the carbonyl group in the main chain of Lys336 and the hydroxyl group in the side chain of the residue at position 340 is critical for arginine recognition of NAGK. In addition, we newly identified two mutations in the ARG5,6 gene encoding the Cys119Tyr or Val267Ala variant of NAGK of sake yeast mutants with intracellular ornithine accumulation. Although it is unlikely that Cys119 and Val267 are directly involved in arginine recognition, we found here that two variants of NAGK were insensitive to arginine feedback inhibition and contributed to high-level production of ornithine. Structural analysis of NAGK suggests that these two amino acid substitutions influence the sensitivity to Arg feedback inhibition through alterations in local conformation around each residue. IMPORTANCE Ornithine has a number of physiological benefits in humans. Thus, an Orn-rich alcoholic beverage is expected to relieve feelings of fatigue after drinking. In the yeast Saccharomyces cerevisiae, N-acetyl glutamate kinase (NAGK) encoded by the ARG5,6 gene catalyzes the second step in ornithine and arginine biosynthesis, and its activity is subjected to feedback inhibition by arginine. Here, we revealed a role of key residues in the formation of the arginine-binding cavity which is critical for arginine recognition of NAGK. In addition, we analyzed novel arginine feedback inhibition-insensitive variants of NAGK in sake yeast mutants with ornithine overproduction and proposed that the amino acid substitutions in the NAGK variants destabilize the arginine-binding cavity, leading to the lower sensitivity to arginine feedback inhibition of NAGK activity. These findings provide new insight into the allosteric regulation of NAGK activity and will help to construct superior industrial yeast strains for high-level production of ornithine.
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15
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Li Y, Wang T, Li S, Yin P, Sheng H, Wang T, Zhang Y, Zhang K, Wang Q, Lu S, Dong J, Li B. Influence of GABA-producing yeasts on cheese quality, GABA content, and the volatilome. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112766] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Renes E, Fernández D, Abarquero D, Ladero V, Álvarez MA, Tornadijo ME, Fresno JM. Effect of forage type, season, and ripening time on selected quality properties of sheep milk cheese. J Dairy Sci 2021; 104:2539-2552. [PMID: 33455752 DOI: 10.3168/jds.2020-19036] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 10/19/2020] [Indexed: 01/16/2023]
Abstract
The aim of this research was to study changes in the microbial populations, free AA profile, biogenic amine content, and sensory characteristics of ripened cheeses (100 and 180 d) produced in different seasons (summer, autumn, winter, and spring) from pasteurized sheep milk from 8 commercial flocks fed hay or silage diets. Twenty-one individual AA and 6 biogenic amines were determined by ultra-high performance liquid chromatography. Type of conserved forage for sheep feeding did not affect the variables studied, which is of great interest because hay and silage are low-cost ingredients for sheep feeding. Proteolysis led total free AA concentrations ranging between 35,179.26 and 138,063.71 mg/kg of cheese at 180 d of ripening. γ-Aminobutyric acid, which has been associated with beneficial effects on human health, was the second most abundant AA in all cheese samples, accounting for 15% of total free AA. Spring cheeses showed 2-fold higher concentrations of γ-aminobutyric acid than summer and autumn cheeses at the end of ripening. Overall, spring, winter, and autumn cheeses had lower average concentration of biogenic amines (431.99 mg/kg of cheese) than summer cheeses (825.70 mg/kg of cheese) as well as better sensory characteristics. Therefore, this study could provide the dairy industry with useful information for producing cheeses with valuable nutritional and sensory quality for consumers.
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Affiliation(s)
- E Renes
- Department of Food Hygiene and Technology, Faculty of Veterinary Science, University of León, 24071, León, Spain
| | - D Fernández
- Department of Food Hygiene and Technology, Faculty of Veterinary Science, University of León, 24071, León, Spain
| | - D Abarquero
- Department of Food Hygiene and Technology, Faculty of Veterinary Science, University of León, 24071, León, Spain
| | - V Ladero
- Instituto de Productos Lácteos de Asturias (IPLA-CSIC), 33300, Villaviciosa, Asturias, Spain
| | - M A Álvarez
- Instituto de Productos Lácteos de Asturias (IPLA-CSIC), 33300, Villaviciosa, Asturias, Spain
| | - M E Tornadijo
- Department of Food Hygiene and Technology, Faculty of Veterinary Science, University of León, 24071, León, Spain
| | - J M Fresno
- Department of Food Hygiene and Technology, Faculty of Veterinary Science, University of León, 24071, León, Spain.
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17
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Xiao J, Chen Y, Li J, Shi X, Deng L, Wang B. Evaluation of the Effect of Auxiliary Starter Yeasts With Enzyme Activities on Kazak Cheese Quality and Flavor. Front Microbiol 2020; 11:614208. [PMID: 33391244 PMCID: PMC7772356 DOI: 10.3389/fmicb.2020.614208] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 11/18/2020] [Indexed: 11/30/2022] Open
Abstract
To investigate the effect of yeasts on Kazak cheese quality and flavor, three isolated yeasts (Kluyveromyces marxianus A2, Pichia kudriavzevii A11, and Pichia fermentans A19) were used to ferment cheeses and designated as StC, LhC, and WcC, respectively. The cheese fermented with a commercial lactic acid starter without adding yeast was used as control named LrC. The results showed that the texture of cheese added with yeasts were more brittle. K. marxianus A2 contributed to the formation of free amino acids and organic acids, especially glutamate and lactic acid. Moreover, K. marxianus A2 provides cheese with onion, oily, and floral aromas. Furthermore, P. kudriavzevii A11 promotes a strong brandy, herbaceous, and onion flavor. Although no significant aroma change was observed in PfC, it promoted the production of acetic acid, isoamyl acetate, and phenethyl acetate. These results indicate that yeasts are important auxiliary starters for cheese production.
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Affiliation(s)
- Jing Xiao
- College of Information Science and Technology, Shihezi University, Shihezi, China
| | - Yu Chen
- Food College, Shihezi University, Shihezi, China
| | - Jie Li
- Food College, Shihezi University, Shihezi, China
| | - Xuewei Shi
- Food College, Shihezi University, Shihezi, China
| | - Li Deng
- Food College, Shihezi University, Shihezi, China
| | - Bin Wang
- Food College, Shihezi University, Shihezi, China
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18
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Nzekoue FK, Alesi A, Vittori S, Sagratini G, Caprioli G. Development of functional whey cheese enriched in vitamin D 3: nutritional composition, fortification, analysis, and stability study during cheese processing and storage. Int J Food Sci Nutr 2020; 72:746-756. [PMID: 33292001 DOI: 10.1080/09637486.2020.1857711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
"Ricotta" cheese is a traditional and popular Italian fresh whey cheese commonly produced from cow's milk. Food fortification is an efficient strategy to reduce the high global prevalence of vitamin D deficiency. This study aims to study the chemical-nutritional analysis of ricotta cheese and to assess its suitability as a dairy matrix for vitamin D fortification. The chemical-nutritional analyses revealed that ricotta cheese is a good source of proteins (7.8 g/100 g) with high levels of branched-chain amino acids (1.8 g/100 g). Moreover, ricotta contains high levels of calcium (0.4 g/100 g) and phosphorus (0.2 g/100 g). 50 mg of vitamin D3 were added to 95 kg of cheese reaching a mean fortification level of 41.4 ± 4.0 µg/100 g of ricotta cheese. The fortification study showed that vitamin D homogenously distributes in ricotta cheese after the homogenisation process. Moreover, vitamin D3 has high heat stability (93.8 ± 1.8%) and remains stable throughout the shelf-life of the fortified food. This study demonstrates that ricotta cheese represents an ideal alternative dairy matrix for vitamin D3 fortification.
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Affiliation(s)
| | | | - Sauro Vittori
- School of Pharmacy, University of Camerino, Camerino, Italy
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19
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Boukria O, El Hadrami EM, Boudalia S, Safarov J, Leriche F, Aït-Kaddour A. The Effect of Mixing Milk of Different Species on Chemical, Physicochemical, and Sensory Features of Cheeses: A Review. Foods 2020; 9:E1309. [PMID: 32957530 PMCID: PMC7555713 DOI: 10.3390/foods9091309] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 09/12/2020] [Accepted: 09/14/2020] [Indexed: 01/29/2023] Open
Abstract
The yield and quality of cheese are associated with the composition, physicochemical, sensory, rheological, and microbiological properties of milk and with the technology applied to the milk before and/or during cheese processing. This review describes the most important research on cheeses obtained from processing mixtures of different milk species and discusses the effect of milk mixtures (i.e., species and mixture ratios) on composition, physicochemical, sensory, rheological, and microbiological properties of cheeses. More specifically, the present review paper will gather and focus only on studies that have provided a clear comparison between cheeses produced from a mixture of two milk species to cheeses produced from only one species.
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Affiliation(s)
- Oumayma Boukria
- Applied Organic Chemistry Laboratory, Sciences and Techniques Faculty, Sidi Mohamed Ben Abedallah University, BP 2202 Route d’Immouzer, Fez 30050, Morocco; (O.B.); (E.M.E.H.)
| | - El Mestafa El Hadrami
- Applied Organic Chemistry Laboratory, Sciences and Techniques Faculty, Sidi Mohamed Ben Abedallah University, BP 2202 Route d’Immouzer, Fez 30050, Morocco; (O.B.); (E.M.E.H.)
| | - Sofiane Boudalia
- Laboratoire de Biologie, Département d’Écologie et Génie de l’Environnement, Faculté des Sciences de la Nature et de la Vie & Sciences de la Terre et l’Univers, Université 8 Mai 1945 Guelma, BP 401, Guelma 24000, Algeria;
| | - Jasur Safarov
- Department of Food Engineering, Faculty of Mechanical Building, Tashkent State Technical University Named after Islam Karimov, University str. 2, Tashkent 100095, Uzbekistan;
| | - Françoise Leriche
- Université Clermont Auvergne, INRA, VetAgro Sup, UMRF, F-63370 Lempdes, France;
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20
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Tomar O, Akarca G, GÖk V, Çağlar MY. The effects of packaging materials on the fatty acid composition, organic acid content, and texture profiles of Tulum cheese. J Food Sci 2020; 85:3134-3140. [PMID: 32870536 DOI: 10.1111/1750-3841.15404] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 07/07/2020] [Accepted: 07/09/2020] [Indexed: 11/30/2022]
Abstract
In this research, Erzincan Tulum cheese was packaged in its original packaging material, the skin bag, small intestine, and appendix to observe the changes in its physical, chemical, and textural properties during storage day. Lactic acid% values increased in all Tulum cheeses throughout storage stage. At the end of the storage period, the highest value was determined in the sample filled in the small intestine (20.10%). All fatty acid values were increased, and the highest increase was identified in oleic acid (C 18:1) (skin bag 2.18%), linoleic acid (18:2) (appendix 0.41%), and palmitic acid (C 16:0) (small intestine 0.34%), respectively. All organic acids increased in stored sample. The highest increase among organic acids was determined to be 4.47% in lactic acid. As a result of the Texture Profile Analyses (TPA), the hardness, and adhesiveness of Tulum cheeses increased during storage periods, whereas the springiness, cohesiveness, and chewiness values decreased. Gumminess value declined in the sample filled into the appendix (with a value of 36.01), whereas it increased in the other two samples. The highest increase in hardness values was 2,520.27 N at given storage time was in the samples filled into appendix while the highest adhesive values of -49.82 were determined in the sample filled into small intestine. PRACTICAL APPLICATION: Tulum cheese is usually produced by filling sheep or goat skin bag. Goat or sheep skin bag are not always available, and the amount of cheese produced in them is excessive. Therefore, cheeses were also filled to small intestine and appendix. At the end of the study, there were no negative effects on cheeses filled with intestine and appendix. The use of small intestine and appendix has helped to develop a product that will be appreciated by the consumers with no adverse effects in the physicochemical and textural properties of cheese.
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Affiliation(s)
- Oktay Tomar
- Faculty of Agriculture and Natural Science, Kocaeli University, Kocaeli, Turkey
| | - Gökhan Akarca
- Engineering Faculty, Food Engineering Department, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - Veli GÖk
- Ahmet İpek Meat Co., Afyonkarahisar, Turkey
| | - M Yusuf Çağlar
- Food Engineering Department, Faculty of Engineering and Natural Sciences, Istanbul Sabahattin Zaim University, Istanbul, Turkey
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21
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Ohashi M, Nasuno R, Isogai S, Takagi H. High-level production of ornithine by expression of the feedback inhibition-insensitive N-acetyl glutamate kinase in the sake yeast Saccharomyces cerevisiae. Metab Eng 2020; 62:1-9. [PMID: 32805427 DOI: 10.1016/j.ymben.2020.08.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 08/06/2020] [Accepted: 08/08/2020] [Indexed: 01/01/2023]
Abstract
We previously reported that intracellular proline (Pro) confers tolerance to ethanol on the yeast Saccharomyces cerevisiae. In this study, to improve the ethanol productivity of sake, a traditional Japanese alcoholic beverage, we successfully isolated several Pro-accumulating mutants derived from diploid sake yeast of S. cerevisiae by a conventional mutagenesis. Interestingly, one of them (strain A902-4) produced more than 10-fold greater amounts of ornithine (Orn) and Pro compared to the parent strain (K901). Orn is a non-proteinogenic amino acid and a precursor of both arginine (Arg) and Pro. It has some physiological functions, such as amelioration of negative states such as lassitude and improvement of sleep quality. We also identified a homo-allelic mutation in the ARG5,6 gene encoding the Thr340Ile variant N-acetylglutamate kinase (NAGK) in strain A902-4. The NAGK activity of the Thr340Ile variant was extremely insensitive to feedback inhibition by Arg, leading to intracellular Orn accumulation. This is the first report of the removal of feedback inhibition of NAGK activity in the industrial yeast, leading to high levels of intracellular Orn. Moreover, sake and sake cake brewed with strain A902-4 contained 4-5 times more Orn than those brewed with strain K901. The approach described here could be a practical method for the development of industrial yeast strains with overproduction of Orn.
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Affiliation(s)
- Masataka Ohashi
- Nara Prefecture Institute of Industrial Development, 129-1 Kashiwagi-cho, Nara, Nara, 630-8031, Japan
| | - Ryo Nasuno
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan
| | - Shota Isogai
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan
| | - Hiroshi Takagi
- Division of Biological Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan.
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22
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Redruello B, Szwengiel A, Ladero V, del Rio B, Alvarez MA. Identification of technological/metabolic/environmental profiles of cheeses with high GABA contents. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109603] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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23
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Characteristic physicochemical indexes and flavor compounds in Xinjiang Kazak cheese during ripening. FOOD BIOSCI 2020. [DOI: 10.1016/j.fbio.2020.100586] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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24
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Li J, Huang Q, Zheng X, Ge Z, Lin K, Zhang D, Chen Y, Wang B, Shi X. Investigation of the Lactic Acid Bacteria in Kazak Cheese and Their Contributions to Cheese Fermentation. Front Microbiol 2020; 11:228. [PMID: 32226414 PMCID: PMC7080652 DOI: 10.3389/fmicb.2020.00228] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 01/30/2020] [Indexed: 11/16/2022] Open
Abstract
Kazak cheese is a traditional dairy product fermented by lactic acid bacteria (LAB) in Xinjiang. To investigate the LAB in Kazak cheese and their contributions to cheese fermentation, four representative LAB, Streptococcus thermophilus B8, Lactobacillus helveticus B6, Weissella confusa B14, and Lactobacillus rhamnosus B10, were isolated from Kazak cheese and subsequently used to ferment cheeses, which were named StC, LhC, WcC, and LrC, respectively. The result showed that most of the physical and chemical indicators had no significant difference, except for moisture and fat. W. confusa B14 was beneficial to the production of amino acids, whereas S. thermophilus B8 promoted the formation of organic acids and contributed to formation ideal texture property. Furthermore, the four cheeses all possessed a strong fruity aroma, with brandy, sweet, herbaceous, pungent, and fatty aromas being the most prominent in WcC. This is because L. helveticus B6 produced a high concentration of hexanal, nonanal, octanal, 3-methylbutanoic acid, ethyl acetate, ethyl butanoate, isoamyl acetate, and ethyl hexanoate in LhC. Research on the fermentation mechanism of LAB in cheese will provide a theoretical basis for the quality control and industrial production of Kazak cheese.
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Affiliation(s)
- Jie Li
- Food College, Shihezi University, Shihezi, China
| | - Qian Huang
- Food College, Shihezi University, Shihezi, China
| | | | - Zhengkai Ge
- Food College, Shihezi University, Shihezi, China
| | - Ke Lin
- Food College, Shihezi University, Shihezi, China
| | - Dandan Zhang
- Food College, Shihezi University, Shihezi, China
| | - Yu Chen
- Food College, Shihezi University, Shihezi, China
| | - Bin Wang
- Food College, Shihezi University, Shihezi, China
| | - Xuewei Shi
- Food College, Shihezi University, Shihezi, China
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25
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Serrapica F, Uzun P, Masucci F, Napolitano F, Braghieri A, Genovese A, Sacchi R, Romano R, Barone CMA, Di Francia A. Hay or silage? How the forage preservation method changes the volatile compounds and sensory properties of Caciocavallo cheese. J Dairy Sci 2019; 103:1391-1403. [PMID: 31785866 DOI: 10.3168/jds.2019-17155] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 10/14/2019] [Indexed: 12/25/2022]
Abstract
The aim of this study was to determine the effect of the forage preservation method (silage vs. hay) on volatile compounds and sensory properties of a traditional Caciocavallo cheese during ripening. A brown-midrib sudangrass hybrid was cultivated on a 7-ha field and at harvesting it was half ensiled in plastic silo bags and half dried to hay. Forty-four lactating cows were equally allotted into 2 groups fed a isonitrogenous and isoenergetic total mixed ration containing as the sole forage either sorghum hay (H group) or sorghum silage (S group). Milk from the 2 groups was used to produce 3 batches/diet of Caciocavallo ripened for 30, 60, and 90 d. Milk yield and composition as well as cheese chemical and fatty acid composition were not markedly affected by the diet treatment and ripening time. By contrast, ripening induced increased levels of the appearance attribute "yellowness," along with the "overall flavor," the odor/flavor attributes "butter" and "hay," the "salty," "bitter," and "umami" tastes, and the texture attribute "oiliness," whereas the appearance attribute "uniformity" and the texture attribute "elasticity" were reduced. The silage-based diet induced higher perceived intensities of several attributes such as "yellowness"; "overall flavor"; "butter"; "grass" and "hay" odor/flavors; "salty," "bitter," and "umami" tastes; and "tenderness" and "oiliness" textures. In S cheese we also observed higher amounts of ketones and fatty acids. Conversely, H cheese showed the terpene α-pinene, which was not detected in S cheese, and a higher intensity of the appearance attribute "uniformity." These differences allowed the trained panel to discriminate the products, determined an increased consumer liking for 90-d ripened cheese, and tended to increase consumer liking for hay cheese.
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Affiliation(s)
- F Serrapica
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, via Università 100, 80055 Portici (Napoli), Italy
| | - P Uzun
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, via Università 100, 80055 Portici (Napoli), Italy
| | - F Masucci
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, via Università 100, 80055 Portici (Napoli), Italy.
| | - F Napolitano
- Scuola di Scienze Agrarie, Forestali, Alimentari ed Ambientali, Università degli Studi della Basilicata, via dell'Ateneo Lucano 10, 85100 Potenza, Italy
| | - A Braghieri
- Scuola di Scienze Agrarie, Forestali, Alimentari ed Ambientali, Università degli Studi della Basilicata, via dell'Ateneo Lucano 10, 85100 Potenza, Italy
| | - A Genovese
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, via Università 100, 80055 Portici (Napoli), Italy
| | - R Sacchi
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, via Università 100, 80055 Portici (Napoli), Italy
| | - R Romano
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, via Università 100, 80055 Portici (Napoli), Italy
| | - C M A Barone
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, via Università 100, 80055 Portici (Napoli), Italy
| | - A Di Francia
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, via Università 100, 80055 Portici (Napoli), Italy
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26
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Gebreyowhans S, Lu J, Zhang S, Pang X, Lv J. Dietary enrichment of milk and dairy products with n-3 fatty acids: A review. Int Dairy J 2019. [DOI: 10.1016/j.idairyj.2019.05.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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27
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Haastrup MK, Johansen P, Malskær AH, Castro-Mejía JL, Kot W, Krych L, Arneborg N, Jespersen L. Cheese brines from Danish dairies reveal a complex microbiota comprising several halotolerant bacteria and yeasts. Int J Food Microbiol 2018; 285:173-187. [PMID: 30176565 DOI: 10.1016/j.ijfoodmicro.2018.08.015] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 06/06/2018] [Accepted: 08/15/2018] [Indexed: 11/19/2022]
Abstract
The Danish Danbo cheese is a surface ripened semi-hard cheese, which before ripening is submerged in brine for up to 24 h. The brining is required in order to obtain the structural and organoleptic properties of the cheeses. Likewise, the content of NaCl in the cheese will influence especially the surface microbiota being of significant importance for flavour development and prevention of microbial spoilage. Even though the microbiota on cheese surfaces have been studied extensively, limited knowledge is available on the occurrence of microorganisms in cheese brine. The aim of the present study was to investigate by both culture-dependent and -independent techniques the brine microbiota in four Danish dairies producing Danbo cheese. The pH of the brines varied from 5.1 to 5.6 with a dry matter content from 20 to 27% (w/w). The content of lactate varied from 4.1 to 10.8 g/L and free amino acids from 65 to 224 mg/L. Bacteria were isolated on five different media with NaCl contents of 0.85-23.0% (w/v) NaCl. The highest count of 6.3 log CFU/mL was obtained on TSA added 4% (w/v) NaCl. For yeasts, the highest count was 3.7 log CFU/mL on MYGP added 8% (w/v) NaCl. A total of 31 bacterial and eight eukaryotic species were isolated including several halotolerant and/or halophilic species. Among bacteria, counts of ≥6.0 log CFU/mL were obtained for Tetragenococcus muriaticus and Psychrobacter celer, while counts between ≥4.5 and < 6.0 log CFU/mL were obtained for Lactococcus lactis, Staphylococcus equorum, Staphylococcus hominis, Chromohalobacter beijerinckii, Chromohalobacter japonicus and Microbacterium maritypicum. Among yeasts, counts of ≥3.5 log CFU/mL were only obtained for Debaryomyces hansenii. By amplicon-based high-throughput sequencing of 16S rRNA gene and ITS2 regions for bacteria and eukaryotes respectively, brines from the same dairy clustered together indicating the uniqueness of the dairy brine microbiota. To a great extent the results obtained by amplicon sequencing fitted with the culture-dependent technique though each of the two methodologies identified unique genera/species. Dairy brine handling procedures as e.g. microfiltration were found to influence the brine microbiota. The current study proves the occurrence of a specific dairy brine microbiota including several halotolerant and/or halophilic species most likely of sea salt origin. The importance of these species during especially the initial stages of cheese ripening and their influence on cheese quality and safety need to be investigated. Likewise, optimised brine handling procedures and microbial cultures are required to ensure an optimal brine microbiota.
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Affiliation(s)
- Martin Kragelund Haastrup
- Department of Food Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark
| | - Pernille Johansen
- Department of Food Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark
| | - Agnete Harboe Malskær
- Department of Food Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark
| | - Josué L Castro-Mejía
- Department of Food Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark
| | - Witold Kot
- Environmental Microbiology and Biotechnology, University of Aarhus, Frederiksborgvej 399, DK-4000 Roskilde, Denmark
| | - Lukasz Krych
- Department of Food Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark
| | - Nils Arneborg
- Department of Food Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark
| | - Lene Jespersen
- Department of Food Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark.
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Sorrentino E, Tremonte P, Succi M, Iorizzo M, Pannella G, Lombardi SJ, Sturchio M, Coppola R. Detection of Antilisterial Activity of 3-Phenyllactic Acid Using Listeria innocua as a Model. Front Microbiol 2018; 9:1373. [PMID: 29997593 PMCID: PMC6028618 DOI: 10.3389/fmicb.2018.01373] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 06/06/2018] [Indexed: 02/05/2023] Open
Abstract
The 3-Phenyllactic acid (PLA) produced by various lactic acid bacteria (LAB) possesses a broad spectrum of antimicrobial activity. In this study, the effect of PLA against Listeria innocua was studied with the aim to obtain additional information about its mechanism of action. The effect of pH on the antilisterial activity of PLA was investigated and a pH-dependent behavior, typical of weak acid, was detected. The antilisterial effect of PLA was firstly compared to that produced by lactic acid (LA) and than to that expressed by phenolic acids (gallic, caffeic, and ferulic acids) evaluating minimum inhibitory concentration (MIC), MBC, and survival kinetic parameters. PLA showed MIC values and death kinetic parameters significantly different from those exhibited by LA and by tested phenolic acids. In particular, the MIC value observed for PLA vs L. innocua resulted lower than that of the other preservative compounds studied herein, and consistent with the quantity generally produced by LAB. Moreover, the effect of PLA and phenolic acids on bacterial surface charge and loss of cellular content resulted different. The overall results highlighted strong differences in the antilisterial mechanism of action among PLA and other compounds such as LA and phenols. Specifically, it is possible to hypothesize that the antilisterial mechanism of action due to PLA is associated with the affinity to cell surface, which contributes to the cellular damage.
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Affiliation(s)
- Elena Sorrentino
- Department of Agricultural Environmental and Food Sciences, University of Molise, Campobasso, Italy
| | - Patrizio Tremonte
- Department of Agricultural Environmental and Food Sciences, University of Molise, Campobasso, Italy
| | - Mariantonietta Succi
- Department of Agricultural Environmental and Food Sciences, University of Molise, Campobasso, Italy
| | - Massimo Iorizzo
- Department of Agricultural Environmental and Food Sciences, University of Molise, Campobasso, Italy
| | - Gianfranco Pannella
- Department of Agricultural Environmental and Food Sciences, University of Molise, Campobasso, Italy
| | - Silvia Jane Lombardi
- Department of Agricultural Environmental and Food Sciences, University of Molise, Campobasso, Italy
| | - Marina Sturchio
- Department of Agricultural Environmental and Food Sciences, University of Molise, Campobasso, Italy
| | - Raffaele Coppola
- Department of Agricultural Environmental and Food Sciences, University of Molise, Campobasso, Italy
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