Provided is an engineered bacterium for producing nervonic acid and/or grease. The genome of the engineering bacterium is integrated with an expression cassette expressing a protein encoded by 3-ketoacyl-CoA synthase (KCS) gene and/or an exterase gene.

Provided is a genetically engineered Candida utilis capable of degrading and utilizing kitchen waste. The genetically engineered Candida utilis is obtained by using a Candida utilis multigene co-expression vector to integrate alpha-amylase, glucoamylase and acid protease genes into the Candida utilis genome and to correctly express such three enzymes.

In the invention described here, the approach is to formulate an edible vaccine based on N-terminal yeast surface display expression platform that producing S.cerevisiae EBY100/pYD5-preS2/S(adw) and S.cerevisiae EBY100/pYD5-preS2/S(adr) for protecting and treating human against hepatitis B virus (HBV) infection, suggesting that yeast surface display expression system expressing HBsAg antigen has potential as a prophylactic treatment for HBV in human via oral vaccination. The technology developed in this patent application can also be used to produce edible (oral) vaccines for preventing and treating other infectious diseases in human.

The present invention relates to a nucleic acid molecule encoding a fusion protein comprising a secretion signal comprising (i) a signal peptide sequence originating from a KRE1 protein or a signal peptide sequence originating from a SWP1 protein; and optionally (ii) an ?-mating factor (MF?) pro-sequence, and a protein of interest. The present invention further relates to a secretion signal as defined herein, an expression cassette comprising said nucleic acid molecule as well as recombinant eukaryotic host cells comprising said nucleic acid molecule or expression cassette. Further encompassed is a method of manufacturing a protein of interest in a eukaryotic host cell and a method of increasing the secretion of a protein of interest from a eukaryotic host cell. Further provided is the use of the secretion signal for increasing the secretion of a recombinant protein of interest from a eukaryotic host cell and the use of the recombinant host cell for manufacturing a recombinant protein of interest.

Disclosed herein are a microorganism with excellent deacetoxycephalosporin C (DAOC) productivity and a use thereof. A mutant microorganism with improved DAOC productivity and a use thereof for producing 7-aminodeacetoxycephalosporanic acid (7-ADCA) are provided.

Provided herein are genetically modified yeast cells that recombinantly expresses a gene encoding a mutant beta-lyase. Also provided are methods of producing fermented products and methods of producing ethanol.

A Saccharomyces cerevisiae expression system and a construction method and application thereof, including an expression vector which includes, from 5 to 3, a YEplac195 plasmid backbone, an exogenous gene expression cassette, and a selective marker gene expression cassette. The exogenous gene expression cassette includes from upstream to downstream an rDNA promoter, an internal ribosome entry site (IRES) sequence, an exogenous gene expression cassette, a poly(T) sequence, and an rDNA terminator. The selective marker gene expression cassette includes a promoter, a selective marker gene, and a transcription terminator.

The present invention relates to the fields of life sciences, micro-organisms and degradation of hydrocarbon chains such as plastics or synthetic polymers. Specifi-cally, the invention relates to an isolated specific enzyme, or a fragment thereof, wherein said enzyme or fragment is capable of degrading a hydrocarbon chain, and to a micro-organism or a host cell comprising the enzyme or a fragment thereof. Also, the present invention relates to a polynucleotide encoding the enzyme or fragment thereof, and to an expression vector or plasmid comprising the polynucleotide of the present invention. And still, the present invention relates to use of the enzyme, fragment, micro-organism, host cell, polynucleotide, expression vector or plasmid of the present invention for degrading a hydrocarbon chain; to a method of degrading a hydrocarbon chain with the specific enzyme or a fragment thereof; and to a method of producing the enzyme or fragment thereof of the present invention.

The present inventors confirmed that when a brazzein expression recombinant vector for high expression of brazzein in Saccharomyces cerevisiae was prepared and a S. cerevisiae strain Y2805 was transformed with the recombinant vector, the expression level of brazzein was particularly high, thereby completing an optimal expression system for mass-producing brazzein. Further, when the brazzein expression system is cultured under the optimal culture conditions according to the present invention, the amount of brazzein produced is further increased, the purification process is simple, and costs are reduced. Therefore, it is expected that the brazzein expression system according to the present invention can be widely used for mass-producing and commercializing brazzein, which is a sweet protein.

Compositions and methods are provided for producing 2fucosyliaciose and L-fucose from recombinant microorganisms.