EP3322302A1 - Procédé de préparation d'un produit laitier fermenté - Google Patents

Procédé de préparation d'un produit laitier fermenté

Info

Publication number
EP3322302A1
EP3322302A1 EP16735638.5A EP16735638A EP3322302A1 EP 3322302 A1 EP3322302 A1 EP 3322302A1 EP 16735638 A EP16735638 A EP 16735638A EP 3322302 A1 EP3322302 A1 EP 3322302A1
Authority
EP
European Patent Office
Prior art keywords
milk
fermented milk
milk product
protein
enzyme
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP16735638.5A
Other languages
German (de)
English (en)
Inventor
Maartje Maria Franse
Monica Diana Vlasie
Cornelis Marinus Muijlwijk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DSM IP Assets BV
Original Assignee
DSM IP Assets BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DSM IP Assets BV filed Critical DSM IP Assets BV
Publication of EP3322302A1 publication Critical patent/EP3322302A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
    • A23C9/00—Milk preparations; Milk powder or milk powder preparations
    • A23C9/12—Fermented milk preparations; Treatment using microorganisms or enzymes
    • A23C9/1203—Addition of, or treatment with, enzymes or microorganisms other than lactobacteriaceae
    • A23C9/1209—Proteolytic or milk coagulating enzymes, e.g. trypsine
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
    • A23C9/00—Milk preparations; Milk powder or milk powder preparations
    • A23C9/12—Fermented milk preparations; Treatment using microorganisms or enzymes
    • A23C9/127—Fermented milk preparations; Treatment using microorganisms or enzymes using microorganisms of the genus lactobacteriaceae and other microorganisms or enzymes, e.g. kefir, koumiss
    • A23C9/1275—Fermented milk preparations; Treatment using microorganisms or enzymes using microorganisms of the genus lactobacteriaceae and other microorganisms or enzymes, e.g. kefir, koumiss using only lactobacteriaceae for fermentation in combination with enzyme treatment of the milk product; using enzyme treated milk products for fermentation with lactobacteriaceae

Definitions

  • the present invention relates to a process for the preparation of a fermented milk product.
  • Fermented milk products such as yoghurt are produced by inoculating milk with a so-called yoghurt culture consisting of lactic acid bacteria. Fermentation of lactose by these bacteria produces lactic acid, which acts on milk protein to give yogurt its texture and characteristic tang.
  • the texture of yoghurt is a.o. influenced by the type of lactic acid bacteria used, eg. Streptococcus thermophilus. Lactobacillus sp. or Bifidobacterium sp., and the protein content in the milk. Usually, a higher protein content in the milk results in a higher viscosity of the resulting yoghurt.
  • the aim of the present invention is a fermented milk product with improved properties.
  • the present disclosure relates to method for preparing a fermented milk product with an improved fluidity.
  • a process for preparing a fermented milk product which comprises 4 to 15 wt/wt % of protein, comprising
  • the disclosure relates to the use of an enzyme having carboxypeptidase activity to increase fluidity of a fermented milk product.
  • Sequence identity It is defined herein that in order to determine the percentage of sequence identity of two amino acid sequences, the sequences are aligned for optimal comparison purposes. In order to optimize the alignment between the two sequences gaps may be introduced in any of the two sequences that are compared. Such alignment can be carried out over the full length of the sequences being compared. Alternatively, the alignment may be carried out over a shorter length, for example over about 20, about 50, about 100 or more amino acids.
  • the sequence identity is the percentage of identical matches between the two sequences over the reported aligned region. The percent sequence identity between two amino acid sequences may be determined using the Needleman and Wunsch algorithm for the alignment of two sequences. (Needleman, S. B. and Wunsch, C. D. (1970) J. Mol.
  • a "mature polypeptide” is defined herein as a polypeptide in its final form and is obtained after translation of a mRNA into polypeptide and post-translational modifications of said polypeptide.
  • Post -translational modifications include N-terminal processing, C-terminal truncation, glycosylation, phosphorylation and removal of leader sequences such as signal peptides, propeptides and/or prepropeptides by cleavage.
  • milk is intended to encompass milks from mammals and plant sources or mixtures thereof.
  • the milk is from a mammal source.
  • Mammal sources of milk include, but are not limited to cow, sheep, goat, buffalo, camel, llama, mare and deer.
  • the milk is from a mammal selected from the group consisting of cow, sheep, goat, buffalo, camel, llama, mare and deer, and combinations thereof.
  • Plant sources of milk include, but are not limited to, milk extracted from soy bean, pea, peanut, barley, rice, oat, quinoa, almond, cashew, coconut, hazelnut, hemp, sesame seed and sunflower seed.
  • milk refers to not only whole milk, but also skim milk or any liquid component derived thereof.
  • the term "fermented milk product” refers to a product that has been fermented with lactic acid bacteria such as Streptococcus thermophilus and/or Lactobacillus delbruekii subsp. Bulgaricus. Other microorganisms such as Lactobacillus delbruekii subsp. lactis, Bifidobacterium animalis subsp. lactis, Lactococcus lactis, Lactobacillus acidophilus and Lactobacillus casei, may also be used. Lactic acid strains other than Streptococcus thermophilus and Lactobacillus delbruekii subsp.
  • bulgaricus are intended to give the finished product various properties, such as the property of promoting the equilibrium of the flora. Fermentation of lactose in the milk by lactic acid bacteria produces lactic acid which acts on the milk protein to give the fermented milk product texture. The fermentation process further increases the shelf-life of the product while enhancing and improving the digestibility of milk. Many different types of fermented milk products can be found in the world today. Examples are soured milk (e.g. buttermilk), soured cream and yogurt.
  • yogurt or yoghurt is a fermented milk product produced by fermentation of milk by lactic acid bacteria, also known as “yoghurt cultures”.
  • Yogurt may be made from cow milk, the protein of which mainly comprises casein, which is most commonly used to make yoghurt, but milk from other mammal sources, or milk from plant sources and combinations thereof may be used as well.
  • the term “yoghurt” furthermore encompasses, but is not limited to, yogurt as defined according to French and European regulations, e.g. coagulated dairy products obtained by lactic acid fermentation by means of specific thermophilic lactic acid bacteria only (i.e. Lactobacillus delbruekii subsp.
  • Yogurts may contain added dairy raw materials (e.g. cream and/or protein) or other ingredients such as sugar or sweetening agents, one or more flavouring(s), cereals or nutritional substances, especially vitamins, minerals and fibers.
  • dairy raw materials e.g. cream and/or protein
  • other ingredients such as sugar or sweetening agents, one or more flavouring(s), cereals or nutritional substances, especially vitamins, minerals and fibers.
  • Such yoghurt advantageously meets the specifications for fermented milks and yoghurts of the AFNOR NF 04-600 standard and/or the codex StanA-lla-1975 standard.
  • Yoghurt encompasses set yogurt, stirred yoghurt, drinking yoghurt, Petittreu, heat treated yogurt and yogurt-like products. Detailed description
  • the present invention relates to a process for preparing a fermented milk product, which comprises 4 to 15 wt wt % protein, comprising
  • a fermented milk product comprising 4 to 15 wt/wt% protein with improved properties was prepared by a process as disclosed herein, as compared to a fermented milk product comprising 4 to 15 wt/wt% protein that was prepared by a process in the absence of carboxypeptidase.
  • An improved property as used herein may be improved fluidity or pourability, texture, flavor or taste of the fermented milk product, such as improved fluidity.
  • a process for preparing a fermented milk product may be a process for preparing a fermented milk product with an improved fluidity, such as compared to the fluidity of a fermented milk product that has been prepared in a process without contacting milk with an enzyme having carboxypeptidase activity.
  • the present disclosure relates to a method for improving fluidity of a fermented milk product comprising
  • the fluidity is improved compared to a fermented milk product that was prepared in the absence of an enzyme having carboxypeptidase activity.
  • An enzyme having carboxypeptidase activity may be contacted with milk during any suitable step in a process for the preparation of a fermented milk product or a method for improving fluidity of a fermented milk product.
  • the enzyme having carboxypeptidase activity may be added to milk prior, during or after contacting the milk with a composition comprising lactic acid bacteria.
  • an enzyme having carboxypeptidase activity is added to milk prior to contacting the milk with a composition comprising lactic acid bacteria.
  • an enzyme having carboxypeptidase activity may be added to the milk during contacting milk with lactic acid bacteria.
  • Contacting milk with an enzyme having carboxypeptidase activity may comprise incubating the milk with an enzyme having carboxypeptidase activity at a suitable temperature and time. For instance incubating milk with an enzyme having carboxypeptidase activity may be performed at a temperature of 1 to 10 degrees Celsius, such as 2 to 8 degrees Celsius, for instance during 6 to 24 hrs or during 8 to 18 hrs, or 10 to 16 hrs.
  • milk may be incubated with an enzyme having carboxypeptidase activity at a temperature of between 25 and 50 °C, or between 30 and 45 °C for instance during contacting milk with lactic acid bacteria.
  • Incubating milk with an enzyme having carboxypeptidase activity may be performed at any suitable pH value, for instance at the pH of milk, or for instance a pH from 3 to 9, or a pH from 4 to 8.
  • An enzyme having carboxypeptidase activity may be a carboxypeptidase, for instance a serine carboxypeptidase which has enzyme classification number EC 3.4.16.
  • a carboxypeptidase may be derived from any suitable microorganism, for instance Aspergillus sp. such as Aspergillus niger, or Aspergillus oryzae.
  • a carboxypeptidase may be carboxypeptidase I from Aspergillus niger as disclosed in Del Degan (1992) Applied Environmental Microbiology, 58, 2144-2152.
  • a carboxypeptidase is a protease enzyme that hydrolyses a peptide bond at the carboxy- (C-) terminal end of a protein or peptide.
  • derived or “derivable” from with respect to the origin of a polypeptide as disclosed herein, means that when carrying out a BLAST search with a polypeptide as disclosed herein, the polypeptide may be derivable from a natural source, such as a microbial cell, of which an endogenous polypeptide shows the highest percentage homology or identity with the polypeptide as disclosed herein.
  • a carboxypeptidase is a polypeptide having carboxypeptidase activity which has at least 80%, 85%, 90%, 91 %, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% identity to the mature polypeptide sequence of SEQ ID NO: 1 .
  • the mature polypeptide sequence may comprise amino acids 53 to 520 of SEQ ID NO:1 , wherein methionine at position 1 in SEQ ID NO: 1 is counted as number 1.
  • a carboxypeptidase as disclosed herein may be produced in any suitable host organism, for instance in fungi Aspergilli, eg Aspergillus niger or Aspergillus oryzae, Trichoderma, or the yeasts Saccharomyces, and Kluyveromyces or the bacteria of the genus Streptomyces, Escherichia, such as Escherichia coli or Bacilli, such as Bacillus subtilis by known methods in the art, for instance using standard molecular techniques as disclosed in Sambrook & Russell, Molecular Cloning: A Laboratory Manual, 3rd Ed., CSHL Press, Cold Spring Harbor, NY, 2001 .
  • an enzyme having carboxypeptidase activity is a purified or a pure enzyme.
  • a pure of purified enzyme is an enzyme that may be at least 50% pure, e.g., at least 60% pure, at least 70% pure, at least 75% pure, at least 80% pure, at least 85% pure, at least 80% pure, at least 90% pure, or at least 95% pure, 96%, 97%, 98%, 99%, 99.5%, 99.9% pure for instance as determined by SDS-PAGE or any other analytical method suitable for this purpose and known to the person skilled in the art.
  • a process for preparing a fermented milk product or a method for improving fluidity of a fermented milk product as disclosed herein may comprise pasteurizing or sterilizing the milk.
  • the milk may be pasteurized or sterilized after contacting the milk with an enzyme having carboxypeptidase activity.
  • the milk is pasteurized or sterilized after adding an enzyme having carboxypeptidase activity to the milk and prior to contacting the milk with a composition comprising lactic acid bacteria.
  • an enzyme having carboxypeptidase activity is inactivated after pasteurization or sterilization of milk.
  • Pasteurizing milk may be performed by any suitable process known in the art.
  • pasteurizing milk comprises bringing the milk to a temperature of between 60 and 65 degrees Celsius during a period of between 5 to 30 min, such as for instance between 10 and 20 min, or bringing the milk to a temperature to a temperature of between 70 and 75 degrees Celsius for 5 to 30 seconds.
  • Sterilizing milk may be performed by any suitable process known in the art.
  • Steriziling milk may comprise bringing the milk to a temperature of between 80 and 100 degrees Celsius during 5 to 40 min.
  • Sterilization may also be performed ultra-high temperature (UHT) sterilization, which comprises bringing the milk to a temperature of between 1 10 and 140 degrees Celsius during 1 to 5 seconds.
  • UHT ultra-high temperature
  • Contacting milk with a composition comprising lactic acid bacteria may comprise adding a composition comprising lactic acid bacteria to milk.
  • Contacting milk with a composition comprising lactic acid bacteria may further comprise fermenting or incubating the milk with lactic acid bacteria, for instance at a temperature of between 25 to 50 degrees Celsius, such as between 30 and 45 degrees Celsius during 2 to 10 hrs, for instance during 3 to 8 hrs or during 4 to 6 hrs, or during 10 to 16 hrs.
  • Suitable lactic acid bacteria in a process for the preparation of a fermented milk product as disclosed herein are for instance strains of Streptococcus thermophiles, and / or Lactobacillus delbrueckii subsp. bulgaricus.
  • a process or method as disclosed herein may further comprise bringing the fermented milk product to a temperature of 1 to 10 degrees Celsius, such as a temperature of between 2 and 8 degrees Celsius, such as a temperature of between 4 and 6 degrees Celsius.
  • a process for preparing a fermented milk product and a method for improving fluidity of a fermented milk product as disclosed herein may further comprise smoothening the fermented milk product.
  • Smoothening usually comprises breaking the texture of the fermented milk product and / or homogenizing the fermented milk product
  • Smoothening the fermented milk product may be performed by any suitable method known in the art. For instance smoothening may be performed by stirring the fermented milk product and / or pumping the fermented milk product, for instance through a tube. Smoothening the fermented milk product may be performed prior to or after bringing the fermented milk product to a temperature of 1 to 10 degrees Celsius.
  • a fermented milk product comprises 2 to 15 wt/wt% of protein, or 4 to 15 wt/wt% of protein, or 3 to 12 wt/wt% of protein, or 3 to 14 wt/wt% of protein, or 4 to 12 wt/wt% of protein, or 4 to 1 1 wt/wt% of protein, or 5 to 10 wt/wt% of protein, or 6 to 9 wt/wt% of protein.
  • Wt/wt% of protein as used herein is defined as dry weight protein per wet weight of milk, or fermented milk product.
  • Protein may be mammalian milk protein such as casein or whey protein, or plant protein such as soy protein.
  • Whey protein may comprise beta-lactoglobuline or alpha-lactalbumin.
  • a process and method as disclosed herein may comprise enriching milk with protein, for instance adding protein to milk prior or during contacting milk with an enzyme having carboxypeptidase activity.
  • Protein that is added to milk may be protein as defined herein above.
  • Milk in a process as disclosed herein may comprise 2 to 15 wet wt/wt % of protein, or 4 to 15 wt/wt% of protein, or 3 to 12 wt/wt% of protein, or 3 to 14 wt/wt % of protein, or 4 to 13 wt/wt% of protein, or 4 to 1 1 wt/wt % of protein, or 5 to 12 wt/wt% of protein, or 5 to 10 wt/wt% of protein or 6 to 9 wt/wt % of protein.
  • a fermented milk product as disclosed herein is a fluid fermented milk product.
  • a fluid fermented milk product as used herein is a fermented milk product that is pourable fermented milk product.
  • a fluid fermented milk product is a yoghurt, preferably a drinking yoghurt or drinkable yoghurt.
  • milk is from a mammalian source, for instance milk is a cow's, ewe's, or goat's milk.
  • the present disclosure relates to the use of an enzyme having carboxypeptidase activity to increase fluidity or pourability of a fermented milk product.
  • the use of an enzyme having carboxypeptidase activity to increase fluidity or pourability of a fermented milk product comprises preparing a fermented milk product as disclosed herein above.
  • the present invention relates to a fermented milk product obtainable by a process as disclosed herein.
  • Yoghurt starter culture TS-80J (batch 9802, UW 43) in Example 1
  • starter culture YS- 131 (batch 8618) in Example 2
  • carboxypeptidase Maxipro CPP (batch 6131344701 ; 954 CPGU/g) were obtained from DSM Food Specialties, Delft, the Netherlands.
  • One CPGU is the amount of enzyme needed to decrease the optical density at 340 nm by one absorbency unit per minute (1 AU/min) applying the conditions of the test (hydrolysis of 1 .5 mM FA-Phe-Ala, pH 4.5 and 37°C).
  • Acidification activity test Acidification activity was tested according to the Method of Analysis Carboxy- fluorescein measurement in yoghurt in MTP format (AMI 15.1 )
  • Fluorescent was measured by Tecan Infinitie pro2000 with the following parameters: Excitation: 491 nm; Emission: 519nm, Gain: 56.
  • RFU is put out in a graph against the real pH of the calibration buffers in exponential. An equation comes out and to calculate the real pH of the samples.
  • Milk with 5 wt/wt % proteins was prepared by adding 2 wt % extra proteins of skimmed milk powder with 35% proteins to full fat commercial pasteurized milk (CPM-ff) with. The milk was stirred at room temperature for 30 minutes and subsequently 20 ml divided in Greiner tubes.
  • Maxipro CPP was diluted 100 x by 0.1 ml in 9.9ml milli-Q mixed wells and kept at room temperature. 0.1 %, 1 % and 5% Maxipro CPP / milk protein (wet wt/ wt %) was added to milk (final concentrations -50 CPGU/L milk, -500 CPGU/L milk and -2500 CPGU/L milk respectively) and stored in a cold room overnight.
  • Starter culture was a direct vat culture (DVC) frozen pellets. Inoculation level was 86 g / 1000L of thawn culture for the DSM cultures.
  • DVC direct vat culture
  • One plate contained set yoghurt that was cooled directly after incubation, one plate was smoothened before cooling by pipetting three times and one plate was smoothened after cooling by pipetting three times.
  • SMP skimmed milk powder
  • Starter culture was a direct vat culture (DVC) frozen pellets. Inoculation level was 4U / 1000L of thawn culture YS-131 for the DSM culture. Maxipro CPP was added at a dose of 2.5% (v/v) to the milk. An amount of 200ml from this milk was used for fermentation at 42°C with continuous monitoring of the pH. When the pH reached a value of 4.6, the fermented milk was texturized by passing through a peristaltic pump (1330 ml / min), followed by cooling of the fermented milk to 4 °C. In the same way, fermented milk was prepared from SMP without enzyme addition. The texturized fermented milks were split in 4 X 125 ml cups and kept at this temperature for 5 days prior to the viscosity measurement.
  • DVC direct vat culture
  • the viscosity of the fermented milks (4 yoghurt cups per sample) was measured by Brookfield.
  • the Brookfield viscometer determines the viscosity by measuring the force required to turn the spindle into the product at a given rate.
  • the Helipath system with a T -spindle is used as it is designed for non-flowing thixotropic materials.
  • the viscometer measures constantly the viscosity in fresh material and is considered the standard measurement for stirred and set yoghurt viscosity.
  • the changes in the viscosity (the average of four sample measurements) for the Maxipro CPP containing fermented milk and the control were shown below in Table 2.
  • Table 2 Viscosity of milk fermented in the presence and absence of Maxipro CPP.

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  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Dairy Products (AREA)

Abstract

La présente invention concerne un procédé de préparation d'un produit laitier fermenté qui comprend 4 à 15 % p/p de protéine, comprenant les étapes consistant à a. mettre du lait en contact avec une enzyme ayant une activité de carboxypeptidase ; b. mettre du lait en contact avec une composition comprenant des ferments lactiques. L'invention concerne en outre l'utilisation d'une enzyme ayant une activité de carboxypeptidase pour augmenter la fluidité d'un produit laitier fermenté.
EP16735638.5A 2015-07-14 2016-07-04 Procédé de préparation d'un produit laitier fermenté Withdrawn EP3322302A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP15176663 2015-07-14
EP15201596 2015-12-21
PCT/EP2016/065663 WO2017009080A1 (fr) 2015-07-14 2016-07-04 Procédé de préparation d'un produit laitier fermenté

Publications (1)

Publication Number Publication Date
EP3322302A1 true EP3322302A1 (fr) 2018-05-23

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EP16735638.5A Withdrawn EP3322302A1 (fr) 2015-07-14 2016-07-04 Procédé de préparation d'un produit laitier fermenté

Country Status (5)

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EP (1) EP3322302A1 (fr)
AU (1) AU2016292539A1 (fr)
BR (1) BR112018000682A2 (fr)
MX (1) MX2018000613A (fr)
WO (1) WO2017009080A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018192830A1 (fr) 2017-04-21 2018-10-25 Dsm Ip Assets B.V. Procédé pour la préparation accélérée d'un produit laitier fermenté à l'aide d'une exopeptidase
JP7249737B2 (ja) * 2018-03-30 2023-03-31 株式会社明治 発酵乳の製造方法

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Publication number Priority date Publication date Assignee Title
JPH07147898A (ja) * 1990-12-20 1995-06-13 Ogawa Koryo Kk 発酵豆乳調製物
NZ537401A (en) * 2001-02-23 2006-08-31 Dsm Ip Assets B Proteases from Aspergillus niger
CN101420861B (zh) * 2006-04-18 2012-06-20 味之素株式会社 强化乳清蛋白质的搅拌型发酵乳的制造方法
CN102370112A (zh) * 2010-08-20 2012-03-14 帝斯曼知识产权资产管理有限公司 腐乳促熟剂和一种快速生产腐乳的方法

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Publication number Publication date
WO2017009080A1 (fr) 2017-01-19
MX2018000613A (es) 2018-05-07
BR112018000682A2 (pt) 2018-09-18
AU2016292539A1 (en) 2018-02-08

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