Provided is a strain CCFM8631 of Lactobacillus reuteri and use thereof. The strain CCFM8631 of Lactobacillus reuteri can significantly increase neurotransmitter 5-hydroxytryptamine level in peripheral blood, recover the hormone levels, for example testosterone and so on in peripheral blood of rat, normalize abnormal abundances of Blautia genus and Turicibacter genus, Oscillospira genus and Bifidobacterium genus in intestinal flora of rat affected by high-fat high-starch diet, show good tolerance to simulated gastrointestinal fluid and quickly colonize in intestinal, significantly improve pathological damages of tissues such as liver, duodenum and so on, and increase triglyceride and total cholesterol levels in serum and oral glucose tolerance of rat with metabolic syndrome caused by high-fat high-starch diet. The strain CCFM8631 of Lactobacillus reuteri can be used for preventing, relieving or treating metabolic disorder, such as metabolic syndrome, irritable bowel syndrome and mental diseases related to metabolic syndrome such as anxiety, depression and so on.

A novel protein deamidase having an activity of directly acting on a side chain amide group of an asparagine residue in a protein to form a side chain carboxyl group and release ammonia, a microorganism that produces the same, a gene encoding the same, a method for producing the same, and use of the same are provided. A bacterium classified into the class Actinobacteria is cultured to generate protein deamidase, and the enzyme is collected from culture.

A novel protein deamidase having an activity of directly acting on a side chain amide group of an asparagine residue in a protein to form a side chain carboxyl group and release ammonia, a microorganism that produces the same, a gene encoding the same, a method for producing the same, and use of the same are provided. A bacterium classified into the class Actinobacteria is cultured to generate protein deamidase, and the enzyme is collected from culture.

The disclosure discloses Lactococcus lactis subsp. lactis CCFM1018 and application thereof in preparation of food and medicine for excreting a plasticizer, and belongs to the technical field of microorganisms. The Lactococcus lactis subsp. lactis CCFM1018 not only is significantly better than the intestinal resident bacteria Escherichia coli and Enterococcus faecalis in terms of the effect of promoting the excretion of DEHP and MEHP, but also is better than the commercial strain Lactobacillus rhamnosus LGG. Therefore, the Lactococcus lactis subsp. lactis CCFM1018 of the disclosure can be used as an effective means to prevent and alleviate body damage caused by DEHP and MEHP, and does not have toxic or side effects of drugs. Lactococcus lactis subsp. lactis CCFM1018 can be used to prepare pharmaceutical compositions and fermented food for alleviating and preventing the toxicity of DEHP and metabolites thereof, and has a very broad application prospect.

The disclosure discloses Lactococcus lactis subsp. lactis CCFM1018 and application thereof in preparation of food and medicine for excreting a plasticizer, and belongs to the technical field of microorganisms. The Lactococcus lactis subsp. lactis CCFM1018 not only is significantly better than the intestinal resident bacteria Escherichia coli and Enterococcus faecalis in terms of the effect of promoting the excretion of DEHP and MEHP, but also is better than the commercial strain Lactobacillus rhamnosus LGG. Therefore, the Lactococcus lactis subsp. lactis CCFM1018 of the disclosure can be used as an effective means to prevent and alleviate body damage caused by DEHP and MEHP, and does not have toxic or side effects of drugs. Lactococcus lactis subsp. lactis CCFM1018 can be used to prepare pharmaceutical compositions and fermented food for alleviating and preventing the toxicity of DEHP and metabolites thereof, and has a very broad application prospect.

The present invention relates to a method for producing a mesophilic fermented dairy product by fermenting a milk substrate with a mesophilic lactic acid bacterium starter culture comprising at least one Lactococcus lactis strain in the presence of at least one Bacillus subtilis subsp. natto or Bacillus coagulans strain.

The present invention relates to a method for producing a mesophilic fermented dairy product by fermenting a milk substrate with a mesophilic lactic acid bacterium starter culture comprising at least one Lactococcus lactis strain in the presence of at least one Bacillus subtilis subsp. natto or Bacillus coagulans strain.

The present invention relates to a polypeptide having lipase activity wherein the polypeptide, which, when aligned with a polypeptide according to SEQ ID NO: 1, comprises at least one amino acid substitution resulting in Ser (S), Ala (A) or Leu (L) at position 246, Trp (W) at position 307, Leu (L) at position 345, Ile (I) at position 365, and/or Phe (F) at position 534, wherein the position is defined with reference to SEQ ID NO: 1, wherein Ala(A) at position 1 in SEQ ID NO: 1 is counted as number 1 and a method for preparing the polypeptide. The present invention further relates to a process for preparing a food product wherein a polypeptide according to the present invention is used.

The present invention relates to a polypeptide having lipase activity wherein the polypeptide, which, when aligned with a polypeptide according to SEQ ID NO: 1, comprises at least one amino acid substitution resulting in Ser (S), Ala (A) or Leu (L) at position 246, Trp (W) at position 307, Leu (L) at position 345, Ile (I) at position 365, and/or Phe (F) at position 534, wherein the position is defined with reference to SEQ ID NO: 1, wherein Ala(A) at position 1 in SEQ ID NO: 1 is counted as number 1 and a method for preparing the polypeptide. The present invention further relates to a process for preparing a food product wherein a polypeptide according to the present invention is used.

A novel protein deamidase having an activity of directly acting on a side chain amide group of an asparagine residue in a protein to form a side chain carboxyl group and release ammonia, a microorganism that produces the same, a gene encoding the same, a method for producing the same, and use of the same are provided. A bacterium classified into the class Actinobacteria is cultured to generate protein deamidase, and the enzyme is collected from culture.