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Zhang J, Wei L, Miao J, Yu Y, Yu N, Hu Q, Chen H, Chen Y. Authenticity identification of animal species in characteristic milk by integration of shotgun proteomics and scheduled multiple reaction monitoring (MRM) based on tandem mass spectrometry. Food Chem 2024; 436:137736. [PMID: 37863000 DOI: 10.1016/j.foodchem.2023.137736] [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: 07/17/2023] [Revised: 09/19/2023] [Accepted: 10/09/2023] [Indexed: 10/22/2023]
Abstract
Milk is one of the oldest natural dairies with high value, which has different species including cow, camel, donkey, goat, sheep, buffalo, yak and et al. However, economically motivated adulteration of non-cow milk with cheaper cow milk occurs frequently. To develop a high-throughput approach for milk species authentication, integration of shotgun proteomics and scheduled multiple reaction monitoring (MRM) was developed. In total, 37 specific peptides were screened as unique to different species. Specific peptides processing stability was investigated under different treatment (heat, pressure, fermentation). Subsequently, four quantitative ion pairs of peptides from cow milk and six quantitative ion pairs of peptides from six non-cow milks were selected for the adulteration quantitative analysis. The method is capable of detection adulteration in the range of 1%-100%, and the quantitative recoveries ranged from 91.07% to 111.75%. The results suggested that combination of shotgun proteomics and MRM had potential for the milk species authentication.
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Affiliation(s)
- Jiukai Zhang
- Chinese Academy of Inspection and Quarantine, Beijing 100176, PR China
| | - Liyang Wei
- Chinese Academy of Inspection and Quarantine, Beijing 100176, PR China
| | - Jinliang Miao
- Chinese Academy of Inspection and Quarantine, Beijing 100176, PR China
| | - Yue Yu
- Chinese Academy of Inspection and Quarantine, Beijing 100176, PR China; School of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, PR China
| | - Ning Yu
- Chinese Academy of Inspection and Quarantine, Beijing 100176, PR China
| | - Qian Hu
- Chinese Academy of Inspection and Quarantine, Beijing 100176, PR China
| | - He Chen
- Institute of Quality Standard & Testing Technology for Agro-products, Xinjiang Academy of Agricultural Sciences, 830091, PR China
| | - Ying Chen
- Chinese Academy of Inspection and Quarantine, Beijing 100176, PR China.
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von Oesen T, Treblin M, Clawin-Rädecker I, Martin D, Maul R, Hoffmann W, Schrader K, Wegner B, Bode K, Zink R, Rohn S, Fritsche J. Identification of Marker Peptides for the Whey Protein Quantification in Edam-Type Cheese. Foods 2023; 12:foods12102002. [PMID: 37238821 DOI: 10.3390/foods12102002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/09/2023] [Accepted: 05/11/2023] [Indexed: 05/28/2023] Open
Abstract
Several technologies are available for incorporating whey proteins into a cheese matrix. However, there is no valid analytical method available to determine the whey protein content in matured cheese, to date. Consequently, the aim of the present study was to develop a liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the quantification of individual whey proteins based on specific marker peptides ('bottom-up' proteomic approach). Therefore, the whey protein-enriched model of the Edam-type cheese was produced in a pilot plant and on an industrial scale. Tryptic hydrolysis experiments were performed to evaluate the suitability of identified potential marker peptides (PMPs) for α-lactalbumin (α-LA) and β-lactoglobulin (β-LG). Based on the findings, α-LA and β-LG appeared to be resistant to proteolytic degradation during six weeks of ripening and no influence on the PMP was observed. Good levels of linearity (R2 > 0.9714), repeatability (CVs < 5%), and recovery rate (80% to 120%) were determined for most PMPs. However, absolute quantification with external peptide and protein standards revealed differences in model cheese depending on the PMP, e.g., 0.50% ± 0.02% to 5.31% ± 0.25% for β-LG. As protein spiking prior to hydrolysis revealed differing digestion behavior of whey proteins, further studies are required to enable valid quantification in various cheese types.
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Affiliation(s)
- Tobias von Oesen
- Department of Safety and Quality of Milk and Fish Products, Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Hermann-Weigmann-Straße 1, 24103 Kiel, Germany
| | - Mascha Treblin
- Institute of Food Chemistry, Hamburg School of Food Science, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany
| | - Ingrid Clawin-Rädecker
- Department of Safety and Quality of Milk and Fish Products, Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Hermann-Weigmann-Straße 1, 24103 Kiel, Germany
| | - Dierk Martin
- Department of Safety and Quality of Milk and Fish Products, Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Hermann-Weigmann-Straße 1, 24103 Kiel, Germany
| | - Ronald Maul
- Department of Safety and Quality of Milk and Fish Products, Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Hermann-Weigmann-Straße 1, 24103 Kiel, Germany
| | - Wolfgang Hoffmann
- Department of Safety and Quality of Milk and Fish Products, Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Hermann-Weigmann-Straße 1, 24103 Kiel, Germany
| | - Katrin Schrader
- Department of Safety and Quality of Milk and Fish Products, Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Hermann-Weigmann-Straße 1, 24103 Kiel, Germany
| | - Benjamin Wegner
- SGS Germany GmbH, Weidenbaumsweg 137, 21035 Hamburg, Germany
| | - Katja Bode
- Center of Expertise Research & Technology (CoE-R&T), DMK Group (Deutsches Milchkontor GmbH), Flughafenallee 17, 28199 Bremen, Germany
| | - Ralf Zink
- Center of Expertise Research & Technology (CoE-R&T), DMK Group (Deutsches Milchkontor GmbH), Flughafenallee 17, 28199 Bremen, Germany
| | - Sascha Rohn
- Institute of Food Chemistry, Hamburg School of Food Science, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany
- Department of Food Chemistry and Analysis, Institute of Food Technology and Food Chemistry, Technische Universität Berlin, TIB 4/3 1, Gustav Meyer Allee 25, 13355 Berlin, Germany
| | - Jan Fritsche
- Department of Safety and Quality of Milk and Fish Products, Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Hermann-Weigmann-Straße 1, 24103 Kiel, Germany
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Determination of native lactoferrin and other whey proteins at different pH conditions after UHT using reverse phase HPLC. Int Dairy J 2023. [DOI: 10.1016/j.idairyj.2023.105621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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4
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Hewa Nadugala B, Hantink R, Nebl T, White J, Pagel CN, Ranadheera C, Logan A, Raynes JK. The role of glycosylation in amyloid fibril formation of bovine κ-casein. Curr Res Food Sci 2023; 6:100433. [PMID: 36660302 PMCID: PMC9842538 DOI: 10.1016/j.crfs.2023.100433] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/08/2022] [Accepted: 01/02/2023] [Indexed: 01/05/2023] Open
Abstract
In order to explore the functions of glycosylation of κ-Casein (κ-CN) in bovine milk, unglycosylated (UG) and twice glycosylated (2G) forms of κ-CN B were purified by selective precipitation followed by anion exchange chromatography from κ-CN BB milk and tested for their amyloid fibril formation and morphology, oligomerisation states and protein structure. The diameter of self-assembled κ-CN B aggregates of both glyco-form were shown for the first time to be in the same 26.0-28.7 nm range for a 1 mg mL-1 solution. The presence of two bound glycans in the protein structure of 2G κ-CN B led to a greater increase in the maximum amyloid fibril formation rate with increasing protein concentration and a difference in both length (82.0 ± 29.9 vs 50.3 ± 13.7 nm) and width (8.6 ± 2.1 vs 13.9 ± 2.5 nm) for fibril morphology compared to UG κ-CN B. The present results suggest that amyloid fibril formation proceeds at a slow but steady rate via the self-assembly of dissociated, monomeric κ-CN B proteins at concentrations of 0.22-0.44 mg mL-1. However amyloid fibril formation proceeds more rapidly via the assembly of either aggregated κ-CN present in a micelle-like form or dissociated monomeric κ-CN, packed into reorganised formational structures above the critical micellar concentration to form fibrils of differing width. The degree of glycosylation has no effect on the polarity of the adjacent environment, nor non-covalent and disulphide interactions between protein molecules when in the native form. Yet glycosylation can influence protein folding patterns of κ-CN B leading to a reduced tryptophan intrinsic fluorescence intensity for 2G compared to UG κ-CN B. These results demonstrate that glycosylation plays an important role in the modulation of aggregation states of κ-CN and contributes to a better understanding of the role of glycosylation in the formation of amyloid fibrils from intrinsically disordered proteins.
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Affiliation(s)
- Barana Hewa Nadugala
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, VIC, 3052, Australia,CSIRO Agriculture and Food, Werribee Victoria, 3030, Australia
| | - Rick Hantink
- CSIRO Agriculture and Food, Werribee Victoria, 3030, Australia
| | - Tom Nebl
- Biology Group, Biomedical Manufacturing Program, CSIRO, Bayview Ave/Research Way, Clayton, VIC, 3168, Australia
| | - Jacinta White
- CSIRO Manufacturing, Bayview Avenue, Clayton, VIC, 3168, Australia
| | - Charles N. Pagel
- Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, VIC, 3052, Australia
| | - C.S. Ranadheera
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, VIC, 3052, Australia,Corresponding author.
| | - Amy Logan
- CSIRO Agriculture and Food, Werribee Victoria, 3030, Australia,Corresponding author.
| | - Jared K. Raynes
- School of Chemical and Biomolecular Engineering, Faculty of Engineering, The University of Sydney, NSW, 2006, Australia
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von Oesen T, Treblin M, Staudacher A, Clawin-Rädecker I, Martin D, Hoffmann W, Schrader K, Bode K, Zink R, Rohn S, Fritsche J. Determination and evaluation of whey protein content in matured cheese via liquid chromatography. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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6
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Buzás H, Székelyhidi R, Szafner G, Szabó K, Süle J, Bukovics S, Kovács AJ. Developed rapid and simple RP-HPLC method for simultaneous separation and quantification of bovine milk protein fractions and their genetic variants. Anal Biochem 2022; 658:114939. [DOI: 10.1016/j.ab.2022.114939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 09/23/2022] [Accepted: 09/29/2022] [Indexed: 11/01/2022]
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7
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Wang X, Chu H, Xu X, Tian J, Wu Y, Xu W, Tian H, Zhu L. Rapid label-free colorimetric dual-functional aptasensor for β-lactoglobulin detection based on a rational tailoring strategy. Biosens Bioelectron 2022; 208:114223. [DOI: 10.1016/j.bios.2022.114223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 02/20/2022] [Accepted: 03/24/2022] [Indexed: 11/02/2022]
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8
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Ashraf S, Belal F, Salim MM. Spectrofluorometric determination of residual amounts of nitroxynil in food samples. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 274:120993. [PMID: 35245802 DOI: 10.1016/j.saa.2022.120993] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 01/19/2022] [Accepted: 02/01/2022] [Indexed: 06/14/2023]
Abstract
Because of the frequent treatment of dairy cows with nitroxynil (NTX), the presence of the later residues in animal tissues and milk has a significant concern. The quantum yield of the reaction product was calculated. A highly sensitive and rapid spectrofluorometric method for determining the anthelmintic drug (NTX) residual amounts is developed. The proposed approach is based on using Zn/HCl to reduce NTX nitro group to an amino group, resulting in a highly fluorescent derivative that was detected at each of λem 302 nm and 364 nm after excitation at λex = 277 nm. The experimental conditions were carefully studied and optimized. The proposed approach showed good linearity (r2 ≥ 0.9998) with linearity range of 10.0-100.0 ng/mL with a detection limit of 1.89 ng/mL, 1.27 ng/mL and quantification limit of 5.73 ng/mL, 3.86 ng/mL at λem 302 nm and 364 nm, respectively; that is far below the Minimum Regulatory Limits (MRLs) of NTX in animal tissues and milk. The proposed approach was successfully applied for the analysis of the drug in its veterinary formulations, and the obtained results agreed well with those of the official British Pharmacopeia method. Moreover, the proposed method's application was extended to efficiently determine the residues of nitroxynil in meat, liver, kidney and milk samples.
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Affiliation(s)
- Sally Ashraf
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt
| | - F Belal
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt
| | - M M Salim
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt; Pharmaceutical Chemistry Department, Faculty of Pharmacy, Horus University- Egypt, New Damietta, 34518, Egypt.
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9
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Abstract
Membrane chromatography (MC) is an emerging bioseparation technology combining the principles of membrane filtration and chromatography. In this process, one type of molecule is adsorbed in the stationary phase, whereas the other type of molecule is passed through the membrane pores without affecting the adsorbed molecule. In subsequent the step, the adsorbed molecule is recovered by an elution buffer with a unique ionic strength and pH. Functionalized microfiltration membranes are usually used in radial flow, axial flow, and lateral flow membrane modules in MC systems. In the MC process, the transport of a solute to a stationary phase is mainly achieved through convection and minimum pore diffusion. Therefore, mass transfer resistance and pressure drop become insignificant. Other characteristics of MC systems are a minimum clogging tendency in the stationary phase, the capability of operating with a high mobile phase flow rate, and the disposable (short term) application of stationary phase. The development and application of MC systems for the fractionation of individual proteins from whey for investigation and industrial-scale production are promising. A significant income from individual whey proteins together with the marketing of dairy foods may provide a new commercial outlook in dairy industry. In this review, information about the development of a MC system and its applications for the fractionation of individual protein from whey are presented in comprehensive manner.
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Schubert T, Ergin I, Panetta F, Hinrichs J, Atamer Z. Application of a temperature-controlled decanter centrifuge for the fractionation of αS-, β- and κ-casein on pilot scale. Int Dairy J 2021. [DOI: 10.1016/j.idairyj.2021.105148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Corrigan BM, Kilcawley KN, Sheehan JJ. Validation of a reversed‐phase high‐performance liquid chromatographic method for the quantification of primary proteolysis during cheese maturation. INT J DAIRY TECHNOL 2021. [DOI: 10.1111/1471-0307.12765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bernard Martin Corrigan
- Food Chemistry and Technology Department Teagasc Food Research Centre Moorepark Fermoy Co. Cork P61C966Ireland
| | - Kieran Noel Kilcawley
- Food Quality and Sensory Science Department Teagasc Food Research Centre MooreparkFermoy, Co. Cork P61C966 Ireland
| | - Jeremiah J Sheehan
- Food Chemistry and Technology Department Teagasc Food Research Centre Moorepark Fermoy Co. Cork P61C966Ireland
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12
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13
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Chen HZ, Zhang M, Rao Z. Effect of ultrasound-assisted thawing on gelling and 3D printing properties of silver carp surimi. Food Res Int 2021; 145:110405. [PMID: 34112408 DOI: 10.1016/j.foodres.2021.110405] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 02/19/2021] [Accepted: 05/06/2021] [Indexed: 11/29/2022]
Abstract
The effects of ultrasound-assisted thawing (at ultrasonic frequencies of 45, 80 and 100 kHz) and water immersion thawing on gelling and 3D printing properties of silver carp surimi were examined. Ultrasound-assisted thawing (UT) can save 13.5%~40.4% time, and high ultrasonic frequency (80 kHz and 100 kHz) did not cause high thawing loss. Thawing at higher ultrasonic frequency could reduce the damage of the secondary and tertiary structure of myofibrillar proteins. No significant differences were observed for the main relaxation component (T22) and its peak area proportion (P22), and rheological properties, resulting in similar printing performance. After steam heating, cuboid samples in UT-100 kHz group kept the best geometrical shapes and had the highest hardness, springiness, and chewiness. Thus, ultrasound-assisted thawing provides a promising thawing method in food materials of 3D printing.
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Affiliation(s)
- Hui-Zhi Chen
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, 214122 Wuxi, Jiangsu, China; International Joint Laboratory on Food Safety, Jiangnan University, 214122 Wuxi, Jiangsu, China
| | - Min Zhang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, 214122 Wuxi, Jiangsu, China; Jiangsu Province Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, 214122 Wuxi, Jiangsu, China.
| | - Zhiming Rao
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 214122 Wuxi, Jiangsu, China
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John JA, Ghosh BC. Production of whey protein hydrolyzates and its incorporation into milk. FOOD PRODUCTION, PROCESSING AND NUTRITION 2021. [DOI: 10.1186/s43014-021-00055-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Abstract
Whey proteins provide an excellent source of low-molecular-weight bioactive peptides with important functional properties and bioactivities like antihypertensive, opioid, and antimicrobial effects. Presence of peptide molecules with lower molecular weight has a great role in food for health promotion. In this investigation, the release of low-molecular-weight peptides from whey protein concentrate was attempted by using enzymatic digestion. The hydrolyzate was then incorporated into milk to obtain enriched milk (EM) with low-molecular-weight peptides. Based on sensory analysis of EM, electrophoretic and RP-HPLC studies, hydrolyzates of 10% protein (degree of hydrolysis 5%; enzyme/ substrate E/S, 1:50) were finally incorporated into milk at 20% (v/v) to develop an acceptable product enriched with low-molecular-weight peptides. EM had higher protein content, viscosity and emulsifying properties than control milk with 3% fat. It is recommended that EM should not be sterilized as it results in coagulation, but can be safely pasteurized and spray dried without any undesirable effects. Maximum ACE-inhibition activity was obtained in hydrolyzate, followed by EM. This study is expected to boost the opportunity for the dairy industry to venture further into the nutraceutical dairy market.
Graphical abstract
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Birch J, Khan S, Madsen M, Kjeldsen C, Møller MS, Stender EGP, Peters GJ, Duus JØ, Kragelund BB, Svensson B. Binding Sites for Oligosaccharide Repeats from Lactic Acid Bacteria Exopolysaccharides on Bovine β-Lactoglobulin Identified by NMR Spectroscopy. ACS OMEGA 2021; 6:9039-9052. [PMID: 33842774 PMCID: PMC8028130 DOI: 10.1021/acsomega.1c00060] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 03/11/2021] [Indexed: 05/26/2023]
Abstract
Lactic acid bacterial exopolysaccharides (EPS) are used in the food industry to improve the stability and rheological properties of fermented dairy products. β-Lactoglobulin (BLG), the dominant whey protein in bovine milk, is well known to bind small molecules such as fatty acids, vitamins, and flavors, and to interact with neutral and anionic polysaccharides used in food and pharmaceuticals. While sparse data are available on the affinity of EPS-milk protein interactions, structural information on BLG-EPS complexes, including the EPS binding sites, is completely lacking. Here, binding sites on BLG variant A (BLGA), for oligosaccharides prepared by mild acid hydrolysis of two EPS produced by Streptococcus thermophilus LY03 and Lactobacillus delbrueckii ssp. bulgaricus CNRZ 1187, respectively, are identified by NMR spectroscopy and supplemented by isothermal titration calorimetry (ITC) and molecular docking of complexes. Evidence of two binding sites (site 1 and site 2) on the surface of BLGA is achieved for both oligosaccharides (LY03-OS and 1187-OS) through NMR chemical shift perturbations, revealing multivalency of BLGA for EPS. The affinities of LY03-OS and 1187-OS for BLGA gave K D values in the mM range obtained by both NMR (pH 2.65) and ITC (pH 4.0). Molecular docking suggested that the BLGA and EPS complexes depend on hydrogen bonds and hydrophobic interactions. The findings provide insights into how BLGA engages structurally different EPS-derived oligosaccharides, which may facilitate the design of BLG-EPS complexation, of relevance for formulation of dairy products and improve understanding of BLGA coacervation.
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Affiliation(s)
- Johnny Birch
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 224, DK-2800 Kgs. Lyngby, Denmark
| | - Sanaullah Khan
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 224, DK-2800 Kgs. Lyngby, Denmark
| | - Mikkel Madsen
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 224, DK-2800 Kgs. Lyngby, Denmark
| | - Christian Kjeldsen
- NMR
Spectroscopy, Department of Chemistry, Technical
University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark
| | - Marie Sofie Møller
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 224, DK-2800 Kgs. Lyngby, Denmark
| | - Emil G. P. Stender
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 224, DK-2800 Kgs. Lyngby, Denmark
| | - Günther
H. J. Peters
- Biophysical
and Biomedicinal Chemistry, Department of Chemistry, Technical University of Denmark, Kemitorvet 206, DK-2800
Kgs. Lyngby, Denmark
| | - Jens Ø. Duus
- NMR
Spectroscopy, Department of Chemistry, Technical
University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark
| | - Birthe B. Kragelund
- Structural
Biology and NMR Laboratory, Department of Biology, University of Copenhagen, Ole Maaloes Vej 5, DK-2200 Copenhagen N, Denmark
| | - Birte Svensson
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 224, DK-2800 Kgs. Lyngby, Denmark
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Zhao J, Xu Z. Capillary electrophoresis with dual C 4D/UV detection for simultaneously determining major metal cations and whey proteins in milk. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:801-808. [PMID: 33496699 DOI: 10.1039/d0ay02092c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A reliable and simple CE method with dual C4D and UV detection modes for simultaneous determination of major metal cations and whey proteins in milk samples was developed. Sample pretreatment comprised dilution, acidification to pH 4.55 with 10 mM AcOH and centrifugation. The complete separation of metal cations K+, Ca2+, Na+, and Mg2+ and whey proteins α-Lac, and β-Lg could be achieved respectively within 10 min and 20 min in a simple BGE composed of 1.0 M AcOH, 12 mM l-His and 2 mM 18-crown-6 with pH 2.74 at a voltage/current of +15 kV/12.5 μA. The samples were injected hydrodynamically by a pressure of 50 mbar for 5 s, the excitation voltage and excitation frequency of the C4D detector were 80 V and 1000 kHz, respectively and the detection wavelength of UV detection was set at 200 nm. In cation analysis, the range of the detection limit was 0.05-0.10 mg L-1 for C4D detection and 0.10-0.50 mg L-1 for UV detection, respectively, and the relative standard deviations (RSD%, n = 5) of intraday and interday analysis were 0.37-0.55% and 0.46-0.79% for the relative migration time, and 2.51-4.12% and 3.65-4.91% for the peak area, respectively. In whey protein analysis, the detection limits of β-Lg and α-Lac analysis were 5 mg L-1 and 3 mg L-1, respectively and the relative standard deviations (RSD%, n = 5) of intraday and interday analysis were 0.29-0.31% and 0.43-0.48% for the migration time and 2.89-3.25% and 3.29-4.18% for the peak area, respectively. The content of four major metal cations and two whey proteins in various types of milk samples was obtained. The results indicated that the content of metal cations varied little in milk samples of different brands and prices, while the content of whey proteins, as thermosensitive active proteins, varied greatly among different heat-treated milk samples.
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Affiliation(s)
- Jing Zhao
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China.
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17
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Katouzian I, Jafari SM, Maghsoudlou Y, Karami L, Eikani MH. Experimental and molecular docking study of the binding interactions between bovine α-lactalbumin and oleuropein. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2020.105859] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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18
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Miranda G, Bianchi L, Krupova Z, Trossat P, Martin P. An improved LC-MS method to profile molecular diversity and quantify the six main bovine milk proteins, including genetic and splicing variants as well as post-translationally modified isoforms. FOOD CHEMISTRY-X 2020; 5:100080. [PMID: 32123868 PMCID: PMC7037581 DOI: 10.1016/j.fochx.2020.100080] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 12/08/2019] [Accepted: 02/04/2020] [Indexed: 12/17/2022]
Abstract
Identification of the main milk proteins isoforms are inferred from a mass database. Quantification of the six main milk proteins is achieved from corrected UV at 214 nm. Multiple isoforms can be quantified from mass signal, within each protein family. Glycosylation isoforms of κ-casein which impact micelle stability are quantified.
Here we describe a method based on Liquid Chromatography coupled with Mass Spectrometry (LC-MS) that provides an accurate determination of the six main bovine milk proteins, including allelic and splicing variants, as well as isoforms resulting from post-translational modifications, with an unprecedented level of resolution. Proteins are identified from observed molecular masses in comparison with theoretical masses of intact proteins indexed in an “in-house” database that includes nearly 3000 entries. Quantification was performed either from UV (214 nm) or mass signals. Thus, up to one hundred molecules, derived from the six major milk proteins, can be identified and quantified from an individual milk sample. This powerful and reliable method, initially developed as an anchoring method to estimate the composition of the six main bovine milk proteins from MIR spectra, is transferable to several mammalian species, including small ruminants, camels, equines, rabbits, etc., for which specific mass databases are available.
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Affiliation(s)
- Guy Miranda
- UMR GABI, INRAE, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Leonardo Bianchi
- UMR GABI, INRAE, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Zuzana Krupova
- UMR GABI, INRAE, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | | | - Patrice Martin
- UMR GABI, INRAE, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
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19
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Abstract
Grape marc (GPM) is a viticulture by-product that is rich in secondary compounds, including condensed tannins (CT), and is used as a supplement in livestock feeding practices. The aim of this study was to determine whether feeding GPM to lactating dairy cows would alter the milk proteome through changes in nitrogen (N) partitioning. Ten lactating Holstein cows were fed a total mixed ration (TMR) top-dressed with either 1.5 kg dry matter (DM)/cow/day GPM (GPM group; n = 5) or 2.0 kg DM/cow/day of a 50:50 beet pulp: soy hulls mix (control group; n = 5). Characterization of N partitioning and calculation of N partitioning was completed through analysis of plasma urea-N, urine, feces, and milk urea-N. Milk samples were collected for general composition analysis, HPLC quantification of the high abundance milk proteins (including casein isoforms, α-lactalbumin, and β-lactoglobulin) and liquid chromatography tandem mass spectrometry (LC-MS/MS) analysis of the low abundance protein enriched milk fraction. No differences in DMI, N parameters, or calculated N partitioning were observed across treatments. Dietary treatment did not affect milk yield, milk protein or fat content or yield, or the concentrations of high abundance milk proteins quantified by HPLC analysis. Of the 127 milk proteins that were identified by LC-MS/MS analysis, 16 were affected by treatment, including plasma proteins and proteins associated with the blood-milk barrier, suggesting changes in mammary passage. Immunomodulatory proteins, including butyrophilin subfamily 1 member 1A and serum amyloid A protein, were higher in milk from GPM-fed cows. Heightened abundance of bioactive proteins in milk caused by dietary-induced shifts in mammary passage could be a feasible method to enhance the healthfulness of milk for both the milk-fed calf and human consumer. Additionally, the proteome shifts observed in this trial could provide a starting point for the identification of biomarkers suitable for use as indicators of mammary function.
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20
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A Reversed-Phase HPLC Method for Determination of Osteopontin in Infant Formula. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9183711] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Osteopontin (OPN) is a multifunctional whey protein which has recently received much attention for possibly applications in fortifying infant milk formula (IMF) with its bioactivity. However, to date, there is no established high-performance liquid chromatography (HPLC) method to quantify this protein in milk or IMF. In this study, a rapid, simple, isocratic and reliable reversed-phase HPLC method was developed and validated to quantify the OPN in IMF. A C18 column (4.6 × 150 mm × 5 micron) was employed with 20% of 0.1% trifluoroacetic acid (TFA) and 80% of 60% acetonitrile in 0.1% TFA for 10 min detected at 214 nm. The flow rate was 0.3 mL/min with an injection volume of 10 µL. The column temperature was 40 °C, and the peak appeared after 4 min. The validation was based on the system suitability, linearity (r2 = 0.999), limit of detection (LOD) (0.14 mg/L), limit of quantitation (LOQ) (0.41 mg/L), precision (% relative standard deviation (RSD) < 0.2), recovery (% RSD < 3) and robustness. The results confirm that the method developed is suitable for OPN determination in IMF.
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21
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Chen M, Wen F, Zhang Y, Li P, Zheng N, Wang J. Determination of native lactoferrin in milk by HPLC on HiTrapTM Heparin HP column. FOOD ANAL METHOD 2019. [DOI: 10.1007/s12161-019-01572-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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22
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Stender EG, Birch J, Kjeldsen C, Nielsen LD, Duus JØ, Kragelund BB, Svensson B. Alginate Trisaccharide Binding Sites on the Surface of β-Lactoglobulin Identified by NMR Spectroscopy: Implications for Molecular Network Formation. ACS OMEGA 2019; 4:6165-6174. [PMID: 31459761 PMCID: PMC6647953 DOI: 10.1021/acsomega.8b03532] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 03/21/2019] [Indexed: 05/08/2023]
Abstract
β-lactoglobulin (BLG) is a promiscuous protein in terms of ligand interactions, having several binding sites reported for hydrophobic biomolecules such as fatty acids, lipids, and vitamins as well as detergents. BLG also interacts with neutral and anionic oligo- and polysaccharides for which the binding sites remain to be identified. The multivalency offered by these carbohydrate ligands is expected to facilitate coacervation, an electrostatically driven liquid-liquid phase separation. Using heteronuclear single quantum coherence NMR spectroscopy and monitoring chemical shift perturbations, we observed specific binding sites of modest affinity for alginate oligosaccharides (AOSs) prepared by alginate lyase degradation. Two different AOS binding sites (site 1 and site 2) centered around K75 and K101 were identified for monomeric BLG isoform A (BLGA) at pH 2.65. In contrast, only site 1 around K75 was observed for dimeric BLGA at pH 4.0. The data suggest a pH-dependent mechanism whereby both the BLGA dimer-monomer equilibrium and electrostatic interactions are exploited. This variability allows for control of coacervation and particle formation of BLGA/alginate mixtures via directed polysaccharide bridging of AOS binding sites and has implication for molecular network formation. The results are valuable for design of polyelectrolyte-based BLG particles and coacervates for carrying nutraceuticals and modulating viscosity in dairy products by use of alginates.
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Affiliation(s)
- Emil G.
P. Stender
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building
224, DK-2800 Kgs. Lyngby, Denmark
| | - Johnny Birch
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building
224, DK-2800 Kgs. Lyngby, Denmark
| | - Christian Kjeldsen
- Department
of Chemistry, Technical University of Denmark, Kemitorvet, Building
207, DK-2800 Kgs. Lyngby, Denmark
| | - Lau D. Nielsen
- Structural
Biology and NMR Laboratory, Linderstrøm-Lang Centre for Protein
Science, Department of Biology, University
of Copenhagen, Ole Maaløes
Vej 5, DK-2200 Copenhagen
N, Denmark
| | - Jens Ø. Duus
- Department
of Chemistry, Technical University of Denmark, Kemitorvet, Building
207, DK-2800 Kgs. Lyngby, Denmark
| | - Birthe B. Kragelund
- Structural
Biology and NMR Laboratory, Linderstrøm-Lang Centre for Protein
Science, Department of Biology, University
of Copenhagen, Ole Maaløes
Vej 5, DK-2200 Copenhagen
N, Denmark
- E-mail: . phone: +45 3532 2081 (B.S.)
| | - Birte Svensson
- Enzyme
and Protein Chemistry, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building
224, DK-2800 Kgs. Lyngby, Denmark
- E-mail: . phone: +45 4525 2740 (B.B.K.)
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23
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Greenwood SL, Honan MC. Symposium review: Characterization of the bovine milk protein profile using proteomic techniques. J Dairy Sci 2019; 102:2796-2806. [PMID: 30612793 DOI: 10.3168/jds.2018-15266] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 10/26/2018] [Indexed: 12/27/2022]
Abstract
Identification and characterization of the comprehensive bovine milk proteome has historically been limited due to the dichotomy of protein abundances within milk. The high abundance of a select few proteins, including caseins, α-lactalbumin, β-lactoglobulin, and serum albumin, has hindered intensive identification and characterization of the vast array of low-abundance proteins in milk due to limitations in separation techniques and protein labeling capacity. In more recent years, the development and advancement of proteomics techniques have yielded valuable tools for characterization of the protein profile in bovine milk. More extensive fractionation and enrichment techniques, including the use of combinations of precipitation techniques, immunosorption, gel electrophoresis, chromatography, ultracentrifugation, and hexapeptide-based binding enrichment, have allowed for better isolation of lower abundance proteins for further downstream liquid chromatography-tandem mass spectrometry approaches. The different milk subfractions isolated during these processes can also be analyzed as individual entities to assess the protein profile unique to the different fractions-for instance, investigation of the skim milk-associated proteome versus the milk fat globule membrane-associated proteome. Updates to high-throughput methods, equipment, and software have also allowed for greater interpretation and visualization of the data. For instance, labeling techniques have enabled analysis of multiplexed samples and more accurate comparison of specific protein abundances and quantities across samples, and integration of gene ontology analysis has allowed for a more in-depth and visual representation of potential relationships between identified proteins. Inclusively, these developments in proteomic techniques have allowed for a rapid increase in the number of milk-associated proteins identified and a better grasp of the relationships and potential functionality of the proteins within the milk proteome.
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Affiliation(s)
- Sabrina L Greenwood
- Department of Animal and Veterinary Sciences, The University of Vermont, Burlington 05405.
| | - Mallory C Honan
- Department of Animal and Veterinary Sciences, The University of Vermont, Burlington 05405
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24
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Montemurro M, Schwaighofer A, Schmidt A, Culzoni MJ, Mayer HK, Lendl B. High-throughput quantitation of bovine milk proteins and discrimination of commercial milk types by external cavity-quantum cascade laser spectroscopy and chemometrics. Analyst 2019; 144:5571-5579. [DOI: 10.1039/c9an00746f] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Mid-infrared (IR) external cavity-quantum cascade laser (EC-QCL) spectroscopy combined with partial least square modeling (PLS) enables quantitation of bovine milk proteins and discrimination of commercial milk types.
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Affiliation(s)
- Milagros Montemurro
- Institute of Chemical Technologies and Analytics
- Vienna University of Technology
- 1060 Vienna
- Austria
- Laboratorio de Desarrollo Analítico y Quimiometría (LADAQ)
| | - Andreas Schwaighofer
- Institute of Chemical Technologies and Analytics
- Vienna University of Technology
- 1060 Vienna
- Austria
| | - Anatol Schmidt
- Department of Food Science and Technology
- Food Chemistry Laboratory
- BOKU – University of Natural Resources and Life Sciences
- 1190 Vienna
- Austria
| | - María J. Culzoni
- Laboratorio de Desarrollo Analítico y Quimiometría (LADAQ)
- Cátedra de Química Analítica I
- Facultad de Bioquímica y Ciencias Biológicas
- Universidad Nacional del Litoral-CONICET
- Ciudad Universitaria
| | - Helmut K. Mayer
- Department of Food Science and Technology
- Food Chemistry Laboratory
- BOKU – University of Natural Resources and Life Sciences
- 1190 Vienna
- Austria
| | - Bernhard Lendl
- Institute of Chemical Technologies and Analytics
- Vienna University of Technology
- 1060 Vienna
- Austria
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25
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Schubert T, Meric A, Boom R, Hinrichs J, Atamer Z. Application of a decanter centrifuge for casein fractionation on pilot scale: Effect of operational parameters on total solid, purity and yield in solid discharge. Int Dairy J 2018. [DOI: 10.1016/j.idairyj.2018.04.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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26
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Schwaighofer A, Kuligowski J, Quintás G, Mayer HK, Lendl B. Fast quantification of bovine milk proteins employing external cavity-quantum cascade laser spectroscopy. Food Chem 2018; 252:22-27. [DOI: 10.1016/j.foodchem.2018.01.082] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 01/08/2018] [Accepted: 01/11/2018] [Indexed: 12/20/2022]
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27
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Using whey proteins to detect the addition of bovine milk fat in buffalo cream destined for the butter-making process. Food Control 2017. [DOI: 10.1016/j.foodcont.2017.06.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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The β-lactoglobulin content of bovine milk: Development and application of a biosensor immunoassay. Int Dairy J 2017. [DOI: 10.1016/j.idairyj.2017.05.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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29
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Tacoma R, Gelsinger SL, Lam YW, Scuderi RA, Ebenstein DB, Heinrichs AJ, Greenwood SL. Exploration of the bovine colostrum proteome and effects of heat treatment time on colostrum protein profile. J Dairy Sci 2017; 100:9392-9401. [PMID: 28918156 PMCID: PMC6350923 DOI: 10.3168/jds.2017-13211] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 07/24/2017] [Indexed: 01/28/2023]
Abstract
Heat treatment of colostrum is performed on modern dairy farms to reduce pathogenic contamination before hand-feeding the colostrum to newborn calves; however, limited data are available concerning effects of heat treatment on biologically active proteins in colostrum. The objective of this exploratory study was to investigate effects of heat treatment and length of heat treatment on colostrum protein profile. Colostrum samples were collected from Holstein cows within 12 h after parturition and assigned to the following groups: heat treatment at 60°C for 0 (untreated control), 30, 60, or 90 min. Samples were fractionated using acid precipitation, followed by ultracentrifugation and ProteoMiner (Bio-Rad Laboratories, Hercules, CA) treatment, and tandem-mass tagging was used to comparatively assess the low abundance protein profile. A total of 162 proteins were identified with more than 2 peptides in the low abundance protein enriched fraction. Of these, 62 differed in abundance by more than 2-fold in heat treated samples compared with the unheated control. The majority of proteins affected by heat treatment were involved in immunity, enzyme function, and transport-related processes; affected proteins included lactadherin, chitinase-3-like protein 1, and complement component C9. These results provide a foundation for further research to determine optimum heat treatment practices to ensure newborn calves are fed colostrum-containing proteins with the highest nutritional and biological value.
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Affiliation(s)
- R Tacoma
- Department of Animal and Veterinary Sciences, The University of Vermont, Burlington 05405
| | - S L Gelsinger
- Department of Animal Science, The Pennsylvania State University, University Park 16802
| | - Y W Lam
- Vermont Genetics Network Proteomics Facility, The University of Vermont, Burlington 05405
| | - R A Scuderi
- Department of Animal and Veterinary Sciences, The University of Vermont, Burlington 05405
| | - D B Ebenstein
- Department of Animal and Veterinary Sciences, The University of Vermont, Burlington 05405
| | - A J Heinrichs
- Department of Animal Science, The Pennsylvania State University, University Park 16802.
| | - S L Greenwood
- Department of Animal and Veterinary Sciences, The University of Vermont, Burlington 05405
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30
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Tacoma R, Fields J, Ebenstein DB, Lam YW, Greenwood SL. Ratio of dietary rumen degradable protein to rumen undegradable protein affects nitrogen partitioning but does not affect the bovine milk proteome produced by mid-lactation Holstein dairy cows. J Dairy Sci 2017; 100:7246-7261. [PMID: 28711247 PMCID: PMC6350925 DOI: 10.3168/jds.2017-12647] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 05/17/2017] [Indexed: 02/03/2023]
Abstract
Little is known about the bovine milk proteome or whether it can be affected by diet. The objective of this study was to determine if the dietary rumen degradable protein (RDP):rumen undegradable protein (RUP) ra-tio could alter the bovine milk proteome. Six Holstein cows (parity: 2.5 ± 0.8) in mid lactation were blocked by days in milk (80 ± 43 d in milk) and milk yield (57.5 ± 6.0 kg) and randomly assigned to treatment groups. The experiment was conducted as a double-crossover design consisting of three 21-d periods. Within each period, treatment groups received diets with either (1) a high RDP:RUP ratio (RDP treatment: 62.4:37.6% of crude protein) or (2) a low RDP:RUP ratio (RUP treatment: 51.3:48.7% of crude protein). Both diets were isonitrogenous and isoenergetic (crude protein: 18.5%, net energy for lactation: 1.8 Mcal/kg of dry matter). To confirm N and energy status of cows, dry matter intake was determined daily, rumen fluid samples were collected for volatile fatty acid analysis, blood samples were collected for plasma glucose, β-hydroxybutyrate, urea nitrogen, and fatty acid analysis, and total 24-h urine and fecal samples were collected for N analysis. Milk samples were collected to determine the general milk composition and the protein profile. Milk samples collected for high-abundance protein analysis were subjected to HPLC analysis to determine the content of α-casein, β-casein, and κ-casein, as well as α-lactalbumin and β-lactoglobulin. Samples collected for low-abundance protein analysis were fractionated, enriched using ProteoMiner treatment, and separated using sodium dodecyl sulfate-PAGE. After excision and digestion, the peptides were analyzed using liquid chromatography (LC) tandem mass spectrometry (MS/MS). The LC-MS/MS data were analyzed using PROC GLIMMIX of SAS (version 9.4, SAS Institute Inc., Cary, NC) and adjusted using the MULTTEST procedure. All other parameters were analyzed using PROC MIXED of SAS. No treatment differences were observed in dry matter intake, milk yield, general milk composition, plasma parameters, or rumen volatile fatty acid concentrations, indicating no shift in total energy or protein available. Milk urea N and plasma urea N concentrations were higher in the RDP group, indicating some shift in N partitioning due to diet. A total of 595 milk proteins were identified, with 83% of these proteins known to be involved in cellular processes. Although none of the low-abundance proteins identified by LC-MS/MS were affected by diet, feeding a diet high in RUP decreased β-casein, κ-casein, and total milk casein concentration. Further investigations of the interactions between diet and the milk protein profile are needed to manipulate the milk proteome using diet.
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Affiliation(s)
- R Tacoma
- Department of Animal and Veterinary Sciences, University of Vermont, Burlington, 05405
| | - J Fields
- Vermont Genetics Network Proteomics Facility, University of Vermont, Burlington, 05405
| | - D B Ebenstein
- Department of Animal and Veterinary Sciences, University of Vermont, Burlington, 05405
| | - Y-W Lam
- Vermont Genetics Network Proteomics Facility, University of Vermont, Burlington, 05405; Department of Biology, University of Vermont, Burlington, 05405
| | - S L Greenwood
- Department of Animal and Veterinary Sciences, University of Vermont, Burlington, 05405.
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32
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Ma L, Yang Y, Chen J, Wang J, Bu D. A rapid analytical method of major milk proteins by reversed-phase high-performance liquid chromatography. Anim Sci J 2017; 88:1623-1628. [DOI: 10.1111/asj.12804] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 02/08/2017] [Indexed: 11/26/2022]
Affiliation(s)
- Lu Ma
- State Key Laboratory of Animal Nutrition; Institute of Animal Science; Chinese Academy of Agricultural Sciences; Beijing China
- CAAS-ICRAF Joint Lab on Agroforestry and Sustainable Animal Husbandry; World Agroforestry Centre; East and Central Asia; Beijing China
| | - Yongxin Yang
- State Key Laboratory of Animal Nutrition; Institute of Animal Science; Chinese Academy of Agricultural Sciences; Beijing China
| | - Jingting Chen
- State Key Laboratory of Animal Nutrition; Institute of Animal Science; Chinese Academy of Agricultural Sciences; Beijing China
| | - Jiaqi Wang
- State Key Laboratory of Animal Nutrition; Institute of Animal Science; Chinese Academy of Agricultural Sciences; Beijing China
| | - Dengpan Bu
- State Key Laboratory of Animal Nutrition; Institute of Animal Science; Chinese Academy of Agricultural Sciences; Beijing China
- CAAS-ICRAF Joint Lab on Agroforestry and Sustainable Animal Husbandry; World Agroforestry Centre; East and Central Asia; Beijing China
- Hunan Co-Innovation Center of Animal Production Safety; CICAPS; Changsha; Hunan China
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33
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Kuligowski J, Schwaighofer A, Alcaráz MR, Quintás G, Mayer H, Vento M, Lendl B. External cavity-quantum cascade laser (EC-QCL) spectroscopy for protein analysis in bovine milk. Anal Chim Acta 2017; 963:99-105. [DOI: 10.1016/j.aca.2017.02.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 01/23/2017] [Accepted: 02/02/2017] [Indexed: 01/15/2023]
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34
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Pasture feeding conventional cows removes differences between organic and conventionally produced milk. Food Chem 2017; 229:805-813. [PMID: 28372247 DOI: 10.1016/j.foodchem.2017.02.104] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 02/20/2017] [Accepted: 02/20/2017] [Indexed: 11/21/2022]
Abstract
Perceptions of production methods for organic and conventional milk are changing, with consumers prepared to pay premium prices for milk from either certified organic or conventional grass-fed cows. Our study investigated whether chemical composition differed between milk produced by these two farming systems. Sampling was conducted on two farms sets, each comprised of one organic and one conventional farm. All farms applied year-round pasture grazing. Milk samples were collected throughout the milking season and analysed for free oligosaccharides, fatty acids, major casein and whey proteins, and milk fat volatiles. Fatty acids were influenced by breed and fertilizer application. Oligosaccharides differed between farming systems, with causes presently unknown, while farm set was the dominant influence factor on protein composition. Factors identified in this study influencing milk composition are not exclusive to either farming system, and pasture feeding conventional cows will remove differences previously reported for organic and conventionally produced milk.
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35
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Laible G, Smolenski G, Wheeler T, Brophy B. Increased gene dosage for β- and κ-casein in transgenic cattle improves milk composition through complex effects. Sci Rep 2016; 6:37607. [PMID: 27876865 PMCID: PMC5120311 DOI: 10.1038/srep37607] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 10/31/2016] [Indexed: 12/13/2022] Open
Abstract
We have previously generated transgenic cattle with additional copies of bovine β- and κ casein genes. An initial characterisation of milk produced with a hormonally induced lactation from these transgenic cows showed an altered milk composition with elevated β-casein levels and twofold increased κ-casein content. Here we report the first in-depth characterisation of the composition of the enriched casein milk that was produced through a natural lactation. We have analyzed milk from the high expressing transgenic line TG3 for milk composition at early, peak, mid and late lactation. The introduction of additional β- and κ-casein genes resulted in the expected expression of the transgene derived proteins and an associated reduction in the size of the casein micelles. Expression of the transgenes was associated with complex changes in the expression levels of other milk proteins. Two other major milk components were affected, namely fat and micronutrients. In addition, the sialic acid content of the milk was increased. In contrast, the level of lactose remained unchanged. This novel milk with its substantially altered composition will provide insights into the regulatory processes synchronizing the synthesis and assembly of milk components, as well as production of potentially healthier milk with improved dairy processing characteristics.
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Affiliation(s)
- Götz Laible
- AgResearch, Ruakura Research Centre, Hamilton, New Zealand
| | | | - Thomas Wheeler
- AgResearch, Ruakura Research Centre, Hamilton, New Zealand
| | - Brigid Brophy
- AgResearch, Ruakura Research Centre, Hamilton, New Zealand
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Rutella GS, Solieri L, Martini S, Tagliazucchi D. Release of the Antihypertensive Tripeptides Valine-Proline-Proline and Isoleucine-Proline-Proline from Bovine Milk Caseins during in Vitro Gastrointestinal Digestion. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:8509-8515. [PMID: 27790911 DOI: 10.1021/acs.jafc.6b03271] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The aim of this study was to identify and quantify the release of antihypertensive tripeptides valine-proline-proline (VPP) and isoleucine-proline-proline (IPP) during in vitro oro-gastro-intestinal (OGI) digestion of bovine skimmed milk. The experimental approach combined the recently developed harmonized static in vitro digestion (IVD) model and targeted mass spectrometry to monitor peptide generation. We first demonstrated that VPP and IPP are released from bovine milk proteins during in vitro OGI digestion at final concentrations of 354.3 ± 29.8 and 973.8 ± 155.7 μg/L, respectively. In silico analysis of cleavage sites and mass spectrometry revealed that tetrapeptides VPPF, IPPL, and IPPK are precursors of VPP and IPP. The release of other ACE-inhibitory peptides, such as FVAP, VAP, AW, and VY, was demonstrated, and their fate and the time course were investigated. This research underlines the suitability of an IVD system to study the release of short bioactive peptides during OGI transit.
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Affiliation(s)
- Giuseppina Sefora Rutella
- Department of Life Sciences, University of Modena and Reggio Emilia , Via Amendola, 2 - Pad. Besta, 42100 Reggio Emilia, Italy
| | - Lisa Solieri
- Department of Life Sciences, University of Modena and Reggio Emilia , Via Amendola, 2 - Pad. Besta, 42100 Reggio Emilia, Italy
| | - Serena Martini
- Department of Life Sciences, University of Modena and Reggio Emilia , Via Amendola, 2 - Pad. Besta, 42100 Reggio Emilia, Italy
| | - Davide Tagliazucchi
- Department of Life Sciences, University of Modena and Reggio Emilia , Via Amendola, 2 - Pad. Besta, 42100 Reggio Emilia, Italy
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37
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Cetınkaya S, Akkaya B. Selective and single step adsorption of α-lactalbumin from whole cow's milk on hydroxyapatite microbeads. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 68:573-578. [PMID: 27524056 DOI: 10.1016/j.msec.2016.06.040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 05/30/2016] [Accepted: 06/12/2016] [Indexed: 11/15/2022]
Affiliation(s)
- Serap Cetınkaya
- Cumhuriyet University, Department of Molecular Biology and Genetics, Sivas, Turkey
| | - Birnur Akkaya
- Cumhuriyet University, Department of Molecular Biology and Genetics, Sivas, Turkey
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Vincent D, Elkins A, Condina MR, Ezernieks V, Rochfort S. Quantitation and Identification of Intact Major Milk Proteins for High-Throughput LC-ESI-Q-TOF MS Analyses. PLoS One 2016; 11:e0163471. [PMID: 27749892 PMCID: PMC5066972 DOI: 10.1371/journal.pone.0163471] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 09/10/2016] [Indexed: 11/19/2022] Open
Abstract
Cow's milk is an important source of proteins in human nutrition. On average, cow's milk contains 3.5% protein. The most abundant proteins in bovine milk are caseins and some of the whey proteins, namely beta-lactoglobulin, alpha-lactalbumin, and serum albumin. A number of allelic variants and post-translationally modified forms of these proteins have been identified. Their occurrence varies with breed, individuality, stage of lactation, and health and nutritional status of the animal. It is therefore essential to have reliable methods of detection and quantitation of these proteins. Traditionally, major milk proteins are quantified using liquid chromatography (LC) and ultra violet detection method. However, as these protein variants co-elute to some degree, another dimension of separation is beneficial to accurately measure their amounts. Mass spectrometry (MS) offers such a tool. In this study, we tested several RP-HPLC and MS parameters to optimise the analysis of intact bovine proteins from milk. From our tests, we developed an optimum method that includes a 20-28-40% phase B gradient with 0.02% TFA in both mobile phases, at 0.2 mL/min flow rate, using 75°C for the C8 column temperature, scanning every 3 sec over a 600-3000 m/z window. The optimisations were performed using external standards commercially purchased for which ionisation efficiency, linearity of calibration, LOD, LOQ, sensitivity, selectivity, precision, reproducibility, and mass accuracy were demonstrated. From the MS analysis, we can use extracted ion chromatograms (EICs) of specific ion series of known proteins and integrate peaks at defined retention time (RT) window for quantitation purposes. This optimum quantitative method was successfully applied to two bulk milk samples from different breeds, Holstein-Friesian and Jersey, to assess differences in protein variant levels.
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Affiliation(s)
- Delphine Vincent
- Department of Economic Development, Jobs, Transport and Resources, AgriBio Centre, 5 Ring Road, Bundoora, Victoria 3083, Australia
- * E-mail:
| | - Aaron Elkins
- Department of Economic Development, Jobs, Transport and Resources, AgriBio Centre, 5 Ring Road, Bundoora, Victoria 3083, Australia
| | | | - Vilnis Ezernieks
- Department of Economic Development, Jobs, Transport and Resources, AgriBio Centre, 5 Ring Road, Bundoora, Victoria 3083, Australia
| | - Simone Rochfort
- Department of Economic Development, Jobs, Transport and Resources, AgriBio Centre, 5 Ring Road, Bundoora, Victoria 3083, Australia
- La Trobe University, Bundoora, Victoria 3083, Australia
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39
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Fortification of milk protein content with different dairy protein powders alters its compositional, rennet gelation, heat stability and ethanol stability characteristics. Int Dairy J 2016. [DOI: 10.1016/j.idairyj.2016.06.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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40
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Gajendragadkar CN, Gogate PR. Intensified recovery of valuable products from whey by use of ultrasound in processing steps - A review. ULTRASONICS SONOCHEMISTRY 2016; 32:102-118. [PMID: 27150751 DOI: 10.1016/j.ultsonch.2016.02.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 02/23/2016] [Accepted: 02/24/2016] [Indexed: 06/05/2023]
Abstract
The current review focuses on the analysis of different aspects related to intensified recovery of possible valuable products from cheese whey using ultrasound. Ultrasound can be used for process intensification in processing steps such as pre-treatment, ultrafiltration, spray drying and crystallization. The combination of low-frequency, high intensity ultrasound with the pre-heat treatment minimizes the thickening or gelling of protein containing whey solutions. These characteristics of whey after the ultrasound assisted pretreatment helps in improving the efficacy of ultrafiltration used for separation and also helps in preventing the blockage of orifice of spray dryer atomizing device. Further, the heat stability of whey proteins is increased. In the subsequent processing step, use of ultrasound assisted atomization helps to reduce the treatment times as well as yield better quality whey protein concentrate (WPC) powder. After the removal of proteins from the whey, lactose is a major constituent remaining in the solution which can be efficiently recovered by sonocrystallization based on the use of anti-solvent as ethanol. The scale-up parameters to be considered during designing the process for large scale applications are also discussed along with analysis of various reactor designs. Overall, it appears that use of ultrasound can give significant process intensification benefits that can be harnessed even at commercial scale applications.
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Affiliation(s)
- Chinmay N Gajendragadkar
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India
| | - Parag R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India.
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41
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Fang ZH, Visker MHPW, Miranda G, Delacroix-Buchet A, Bovenhuis H, Martin P. The relationships among bovine αS-casein phosphorylation isoforms suggest different phosphorylation pathways. J Dairy Sci 2016; 99:8168-8177. [PMID: 27522420 DOI: 10.3168/jds.2016-11250] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 06/24/2016] [Indexed: 12/31/2022]
Abstract
Casein (CN) phosphorylation is an important posttranslational modification and is one of the key factors responsible for constructing and stabilizing casein micelles. Variation in phosphorylation degree of αS-CN is of great interest because it is suggested to affect milk technological properties. This study aimed to investigate the variation in phosphorylation degree of αS-CN among milk of individual cows and to explore relationships among different phosphorylation isoforms of αS-CN. For this purpose, we analyzed morning milk samples from 529 French Montbéliarde cows using liquid chromatography coupled with electrospray ionization mass spectrometry. We detected 3 new phosphorylation isoforms: αS2-CN-9P, αS2-CN-14P, and αS2-CN-15P in bovine milk, in addition to the known isoforms αS1-CN-8P, αS1-CN-9P, αS2-CN-10P, αS2-CN-11P, αS2-CN-12P, and αS2-CN-13P. The relative concentrations of each αS-CN phosphorylation isoform varied considerably among individual cows. Furthermore, the phenotypic correlations and hierarchical clustering suggest at least 2 regulatory systems for phosphorylation of αS-CN: one responsible for isoforms with lower levels of phosphorylation (αS1-CN-8P, αS2-CN-10P, and αS2-CN-11P), and another responsible for isoforms with higher levels of phosphorylation (αS1-CN-9P, αS2-CN-12P, αS2-CN-13P, and αS2-CN-14P). Identifying all phosphorylation sites of αS2-CN and investigating the genetic background of different αS2-CN phosphorylation isoforms may provide further insight into the phosphorylation mechanism of caseins.
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Affiliation(s)
- Z H Fang
- GABI, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France; Animal Breeding and Genomics Centre, Wageningen University, PO Box 338, 6700 AH Wageningen, the Netherlands
| | - M H P W Visker
- Animal Breeding and Genomics Centre, Wageningen University, PO Box 338, 6700 AH Wageningen, the Netherlands
| | - G Miranda
- GABI, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - A Delacroix-Buchet
- GABI, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - H Bovenhuis
- Animal Breeding and Genomics Centre, Wageningen University, PO Box 338, 6700 AH Wageningen, the Netherlands
| | - P Martin
- GABI, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France.
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42
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Mao X, Zhang GF, Li C, Zhao YC, Liu Y, Wang TT, Duan CY, Wang JY, Liu LB. One-step method for the isolation of α-lactalbumin and β-lactoglobulin from cow’s milk while preserving their antigenicity. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2016. [DOI: 10.1080/10942912.2016.1181649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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43
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Auldist MJ, Greenwood JS, Wright MM, Hannah M, Williams RPW, Moate PJ, Wales WJ. Incorporating mixed rations and formulated grain mixes into the diet of grazing cows: Effects on milk composition and coagulation properties, and the yield and quality of Cheddar cheese. J Dairy Sci 2016; 99:4196-4205. [PMID: 27016826 DOI: 10.3168/jds.2015-10428] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 02/03/2016] [Indexed: 11/19/2022]
Abstract
Effects of different strategies for feeding supplements to grazing dairy cows on the composition and coagulation properties of milk and the subsequent yield and quality of Cheddar cheese were measured. The experiment used milk from 72 Holstein-Friesian cows, averaging 45d in milk, fed according to 1 of 3 feeding strategies: (1) cows grazed a restricted allowance of perennial ryegrass pasture [approximately 14kg of dry matter (DM)/cow per day, to ground level] supplemented with milled wheat grain fed in the milking parlor and alfalfa hay offered in the paddock (control); (2) same pasture and allowance as control, supplemented with a formulated grain mix containing wheat grain, corn grain, and canola meal fed in the parlor and alfalfa hay fed in the paddock (FGM); or (3) same pasture and allowance as control, supplemented with a partial mixed ration comprising the same formulated grain mix but mixed with alfalfa hay and presented on a feed pad after each milking (PMR). For all strategies, supplements provided the same metabolizable energy and grain:forage ratio (78:22, DM basis). Within each feeding strategy, milk was sampled from cows receiving either 8 or 16kg (DM) of supplement/cow per day. There were 2 replicated groups of 6 cows per supplement amount per dietary strategy; approximately 250L of milk was sampled from each for analyses of composition and coagulation properties and the manufacture of Cheddar cheese. The experiment had a 14-d adaptation period and a 14-d measurement period. For cows fed according to the control strategy, those fed 16kg/cow per day produced milk with lower concentrations of milk fat than cows fed 8kg/cow per day. This effect was not observed for cows fed according to the FGM and PMR strategies. Milk from cows fed 16kg of DM/cow per day according to the control strategy yielded less Cheddar cheese than milk from cows fed according to the PMR strategy, with cheese yields from FGM cows being intermediate. Amount of supplement offered had minor effects on percentages of some fatty acids. We observed few other effects of feeding strategy on milk composition, types of milk protein, milk coagulation properties, or the composition and quality of the resultant Cheddar cheese. These data show that, compared with the traditional control strategy, feeding PMR or FGM may increase milk fat concentration and the subsequent yield of Cheddar cheese without compromising cheese composition or quality.
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Affiliation(s)
- M J Auldist
- Department of Economic Development, Jobs, Transport and Resources, Ellinbank, Victoria 3821, Australia.
| | - J S Greenwood
- Department of Economic Development, Jobs, Transport and Resources, Ellinbank, Victoria 3821, Australia
| | - M M Wright
- Department of Economic Development, Jobs, Transport and Resources, Ellinbank, Victoria 3821, Australia
| | - M Hannah
- Department of Economic Development, Jobs, Transport and Resources, Ellinbank, Victoria 3821, Australia
| | - R P W Williams
- Commonwealth Scientific and Industrial Research Organisation, Food and Nutritional Sciences, Werribee, Victoria 3030, Australia
| | - P J Moate
- Department of Economic Development, Jobs, Transport and Resources, Ellinbank, Victoria 3821, Australia
| | - W J Wales
- Department of Economic Development, Jobs, Transport and Resources, Ellinbank, Victoria 3821, Australia
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44
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Pilbrow J, Bekhit AEDA, Carne A. Fractionation of sheep cheese whey by a scalable method to sequentially isolate bioactive proteins. Food Chem 2016; 203:165-174. [PMID: 26948602 DOI: 10.1016/j.foodchem.2016.02.065] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 01/11/2016] [Accepted: 02/09/2016] [Indexed: 01/30/2023]
Abstract
This study reports a procedure for the simultaneous purification of glyco(caseino)macropeptide, immunoglobulin, lactoperoxidase, lactoferrin, α-lactalbumin and β-lactoglobulin from sheep cheese sweet whey, an under-utilized by-product of cheese manufacture generated by an emerging sheep dairy industry in New Zealand. These proteins have recognized value in the nutrition, biomedical and health-promoting supplements industries. A sequential fractionation procedure using economical anion and cation exchange chromatography on HiTrap resins was evaluated. The whey protein fractionation is performed under mild conditions, requires only the adjustment of pH between ion exchange chromatography steps, does not require buffer exchange and uses minimal amounts of chemicals. The purity of the whey protein fractions generated were analyzed by reversed phase-high performance liquid chromatography and the identity of the proteins was confirmed by mass spectrometry. This scalable procedure demonstrates that several proteins of recognized value can be fractionated in reasonable yield and purity from sheep cheese whey in one streamlined process.
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Affiliation(s)
- Jodi Pilbrow
- Department of Biochemistry, University of Otago, Dunedin, New Zealand.
| | | | - Alan Carne
- Department of Biochemistry, University of Otago, Dunedin, New Zealand
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45
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Muir SK, Ward GN, Jacobs JL. Herbage intake and milk production of late-lactation dairy cows offered a second-year chicory crop during summer. J Dairy Sci 2015; 98:8825-35. [PMID: 26409973 DOI: 10.3168/jds.2014-9147] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2014] [Accepted: 08/03/2015] [Indexed: 12/16/2023]
Abstract
Chicory (Cichorum intybus L.) is a summer-active forage herb which has been proposed as an option to increase summer feed supply, increase dry matter intake, nutrient intake, and milk yield from nonirrigated dairy production systems in southern Australia. Dry matter intake, nutrient intake, milk yield, and yield of milk fat and protein of predominantly Holstein-Friesian dairy cows in late lactation consuming 3 herbage-based diets (4 replicates per treatment) were measured. The 3 grazed herbages were second-year chicory (CHIC) and perennial ryegrass (Lolium perenne L.; PRG) monocultures and a mixed sward (~50:50) of chicory and perennial ryegrass (MIX). All diets (CHIC, PRG, and MIX) were supplemented with alfalfa (Medicago sativa L.) hay (5.5kg of DM/cow per day) and an energy-based concentrate pellet (4.0kg of DM/cow per day). There were no significant differences in milk yield (12.0 to 12.6kg/d across the treatments) or the yield of milk fat (539 to 585g/d) and milk protein (433 to 447g/d) between the 3 herbage-based diets. No differences in DMI (17.9 to 19.2kg/d) or estimated metabolizable energy intake (173 to 185MJ/d) were noted between treatments. Estimated metabolizable energy concentrations in the forages on offer were lower in CHIC than PRG (7.6 vs. 8.2MJ/kg of dry matter), but the concentration in consumed herbage was not different (9.1 vs. 9.2MJ/kg of dry matter); as such, potential for increased milk yield in cows offered CHIC was limited. Increased concentration of polyunsaturated fatty acids was observed in chicory herbage compared with perennial ryegrass. This was associated with increased milk conjugated linoleic acid and milk polyunsaturated fatty acids when chicory formed part of the diet (CHIC compared to PRG and MIX). Chicory could be used as an alternative to perennial ryegrass in summer; however, the developmental stage of chicory will influence concentrations of metabolizable energy and neutral detergent fiber and, therefore, intake and milk production responses compared with perennial ryegrass.
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Affiliation(s)
- S K Muir
- Department of Economic Development, Jobs, Transport and Resources, Warrnambool, Vic 3280, Australia.
| | - G N Ward
- Department of Economic Development, Jobs, Transport and Resources, Warrnambool, Vic 3280, Australia
| | - J L Jacobs
- Department of Economic Development, Jobs, Transport and Resources, Warrnambool, Vic 3280, Australia
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46
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Sturaro A, De Marchi M, Masi A, Cassandro M. Quantification of whey proteins by reversed phase-HPLC and effectiveness of mid-infrared spectroscopy for their rapid prediction in sweet whey. J Dairy Sci 2015; 99:68-76. [PMID: 26585472 DOI: 10.3168/jds.2014-9077] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 09/15/2015] [Indexed: 11/19/2022]
Abstract
In the dairy industry, membrane filtration is used to reduce the amount of whey waste and, simultaneously, to recover whey proteins (WP). The composition of WP can strongly affect the filtration treatment of whey, and rapid determination of WP fractions would be of interest for dairy producers to monitor WP recovery. This study aimed to develop mid-infrared spectroscopy (MIRS) prediction models for the rapid quantification of protein in sweet whey, using a validated rapid reversed phase (RP)-HPLC as a reference method. Quantified WP included α-lactalbumin (α-LA), β-lactoglobulin (β-LG) A and B, bovine serum albumin, caseinomacropeptides, and proteose peptone. Validation of RP-HPLC was performed by calculating the relative standard deviation (RSD) in repeatability and reproducibility tests for WP retention time and peak areas. Samples of liquid whey (n=187) were analyzed by RP-HPLC and scanned through MIRS to collect spectral information (900 to 4,000 cm(-1)); statistical analysis was carried out through partial least squares regression and random cross-validation procedure. Retention times in RP-HPLC method were stable (RSD between 0.03 and 0.80%), whereas the RSD of peak area (from 0.25 to 8.48%) was affected by WP relative abundance. Higher coefficients of determination in validation for MIRS model were obtained for protein fractions present in whey in large amounts, such as β-LG (0.58), total identified WP (0.58), and α-LA (0.56). Results of this study suggest that MIRS is an easy method for rapid quantification of detail protein in sweet whey, even if better resolution was achieved with the method based on RP-HPLC. The prediction of WP in sweet whey by MIRS might be used for screening and for classifying sweet whey according to its total and individual WP contents.
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Affiliation(s)
- Alba Sturaro
- Department of Agronomy, Food, Natural Resources, Animals, and Environment (DAFNAE), University of Padova, Viale dell'Università 16, 35020 Legnaro (PD), Italy
| | - Massimo De Marchi
- Department of Agronomy, Food, Natural Resources, Animals, and Environment (DAFNAE), University of Padova, Viale dell'Università 16, 35020 Legnaro (PD), Italy.
| | - Antonio Masi
- Department of Agronomy, Food, Natural Resources, Animals, and Environment (DAFNAE), University of Padova, Viale dell'Università 16, 35020 Legnaro (PD), Italy
| | - Martino Cassandro
- Department of Agronomy, Food, Natural Resources, Animals, and Environment (DAFNAE), University of Padova, Viale dell'Università 16, 35020 Legnaro (PD), Italy
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47
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Effect of high pressure – low temperature treatments on structural characteristics of whey proteins and micellar caseins. Food Chem 2015; 187:354-63. [DOI: 10.1016/j.foodchem.2015.04.049] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 02/08/2015] [Accepted: 04/13/2015] [Indexed: 11/24/2022]
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48
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Hou X, Sun M, He X, Chen L, Zhang P, He L. Simultaneous quantification of five proteins and seven additives in dairy products with a heart-cutting two-dimensional liquid chromatography method. J Sep Sci 2015; 38:3832-3838. [DOI: 10.1002/jssc.201500684] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 08/25/2015] [Accepted: 08/26/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Xiaofang Hou
- School of Pharmacy; Xi'an Jiaotong University; Xi'an China
| | - Meng Sun
- School of Pharmacy; Xi'an Jiaotong University; Xi'an China
| | - Xiaoshuang He
- School of Pharmacy; Xi'an Jiaotong University; Xi'an China
| | - Liang Chen
- School of Pharmacy; Xi'an Jiaotong University; Xi'an China
| | - Ping Zhang
- School of Pharmacy; Xi'an Jiaotong University; Xi'an China
| | - Langchong He
- School of Pharmacy; Xi'an Jiaotong University; Xi'an China
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49
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Tacoma R, Fields J, Ebenstein DB, Lam YW, Greenwood SL. Characterization of the bovine milk proteome in early-lactation Holstein and Jersey breeds of dairy cows. J Proteomics 2015; 130:200-10. [PMID: 26391770 DOI: 10.1016/j.jprot.2015.09.024] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 09/15/2015] [Accepted: 09/17/2015] [Indexed: 12/25/2022]
Abstract
UNLABELLED Milk is a highly nutritious natural product that provides not only a rich source of amino acids to the consumer but also hundreds of bioactive peptides and proteins known to elicit health-benefitting activities. We investigated the milk protein profile produced by Holstein and Jersey dairy cows maintained under the same diet, management and environmental conditions using proteomic approaches that optimize protein extraction and characterization of the low abundance proteins within the skim milk fraction of bovine milk. In total, 935 low abundance proteins were identified. Gene ontology classified all proteins identified into various cellular localization and function categories. A total of 43 low abundance proteins were differentially expressed between the two dairy breeds. Bioactive proteins involved in host-defense, including lactotransferrin (P=0.0026) and complement C2 protein (P=0.0001), were differentially expressed by the two breeds, whereas others such as osteopontin (P=0.1788) and lactoperoxidase (P=0.2973) were not. This work is the first to outline the protein profile produced by two important breeds of dairy cattle maintained under the same diet, environment and management conditions in order to observe likely true breed differences. This research now allows us to better understand and contrast further research examining the bovine proteome that includes these different breeds. BIOLOGICAL SIGNIFICANCE Within the last decade, the amount of research characterizing the bovine milk proteome has increased due to growing interest in the bioactive proteins that are present in milk. Proteomic analysis of low abundance whey proteins has mainly focused on human breast milk; however, previous research has highlighted the presence of bioactive proteins in bovine milk. Recent publications outlining the cross-reactivity of bovine bioactive proteins on human biological function highlight the need for further investigation into the bovine milk proteome. The rationale behind this study is to characterize and compare the low abundance protein profile in the skim milk fraction produced from Holstein and Jersey breeds of dairy cattle, which are two major dairy cattle breeds in the USA. A combination of fractionation strategies was used to efficiently enrich the low abundance proteins from bovine skim milk for proteomic profiling. A total of 935 low abundance proteins were identified and compared between the two bovine breeds. The results from this study provide insight into breed differences and similarities in the milk proteome profile produced by two breeds of dairy cattle.
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Affiliation(s)
- Rinske Tacoma
- The University of Vermont, Department of Animal & Veterinary Sciences, 570 Main Street, Burlington, VT 05405, United States
| | - Julia Fields
- The University of Vermont, Vermont Genetics Network Proteomics Facility, 109 Carrigan Drive, Burlington, VT 05405, United States
| | - David B Ebenstein
- The University of Vermont, Department of Animal & Veterinary Sciences, 570 Main Street, Burlington, VT 05405, United States
| | - Ying-Wai Lam
- The University of Vermont, Vermont Genetics Network Proteomics Facility, 109 Carrigan Drive, Burlington, VT 05405, United States
| | - Sabrina L Greenwood
- The University of Vermont, Department of Animal & Veterinary Sciences, 570 Main Street, Burlington, VT 05405, United States.
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50
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Ito T, Aoki N, Tsuchiya A, Kaneko S, Suzuki K. Sequential Analysis of β-Lactoglobulin for Allergen Check Using QCM with a Passive Flow System. CHEM LETT 2015. [DOI: 10.1246/cl.150309] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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