Abstract:
PURPOSE: A recombinant microorganism which produces 3-hydroxypropionic acid(3-HP) using a malonic semialdehyde reduction pathway is provided to remarkably enhance 3-HP productivity by gene manipulation. CONSTITUTION: A recombinant microorganism for producing 3-hydroxypropionic acid has a pathway for sequentially producing pyruvate, acetyl Co, malonyl-CoA, and malonic semialdehyde. The microorganism includes Escherichia sp., Saccharomyces sp., or Kluyveromyces sp. A gene encoding lactate dehydrogenase is IdhA or a homolog or a variant thereof. A gene encoding phosphotransacetylase is pta or a homolog or a variant thereof.
Abstract:
PURPOSE: A modified microorganism for producing lactic acids and a method for producing lactic acids are provided to produce lactic acids with high efficiency under an acidic condition. CONSTITUTION: A modified microorganism for producing lactic acids with high efficiency has LDH activity of Pelodiscus sinensis japonicus, Ornithorhynchus anatinus, Tursiops truncates, and Rattus norvegicus. The modified microorganism is yeast or bacteria. The modified microorganism is E.coli or Kluyveromyces marxianus. The modified microorganism produces lactic acids with 12.2% or more of glucose. An expression vector for producing the modified microorganism comprises: a replication origin; a promoter; a polynucleotide; and a terminator. A method for producing lactic acids comprises: a step of culturing the modified microorganism in a medium containing glucose; and a step of collecting lactic acids from the culture.
Abstract:
PURPOSE: A modified microorganism for producing lactic acids is provided to prepare lactic acids with high efficiency under an acidic condition. CONSTITUTION: A modified microorganism for producing lactic acids has a lactate dehydrogenase(LDH) activity of Pelodiscus sinensis japonicus, Ornithorhynchus anatinus, Tursiops truncates, or Rattus norvegicus. The modified microorganism is Escherichia sp. or Kluyveromyces sp. The modified microorganism produces lactic acids with 34% or more of glucose. An expression vector contains: a replication origin for constructing the modified microroganisms; a promoter; a polynucleotide coding LDH activation of one or more species selected from the group consisting of Pelodiscus sinensis japonicus, Ornithorhynchus anatinus, Tursiops truncates, or Rattus norvegicus; and a terminator. The replication origin is ARS/CEN replication origin.
Abstract:
PURPOSE: An expression vector which overexpresses target proteins, and a method for producing the target protein are provided to obtain the proteins in K. marxianus. CONSTITUTION: An expression vector contains: a replication origin; a CYC promoter, a TEF promoter, a GPD promoter, or an ADH promoter; and a terminator. The CYC promoter contains a sequence of sequence number 1 or a sequence having 70% or more sequence homology with the sequence of sequence number 1. The TEF promoter has a sequence of sequence number 2 or a sequence with 70% or more sequence homology with the sequence of sequence number 2. GPD promoter contains a sequence of sequence number 3 or a sequence having 70% or more homology with the sequence of sequence number 3. The ADH promoter has a sequence of sequence number 4 or a sequence having 70% or more sequence homology with the sequence of sequence number 4.
Abstract:
PURPOSE: A method for preparing 3-hydroxypropionic acid using a recombinant microorganism is provided to enhance the productivity by resolve oxidation-reduction unbalance. CONSTITUTION: A recombinant microorganism for preparing 3-hydroxypropionic acid(3-HP) has an activity of reducing malonic semialdehyde to 3-HP and an activity of reducing malonyl-CoA to malonic semialdehyde. The malonyl-CoA reductase(mcr) activation and malonate semialdehyde reductase(msr) activation are derived from M. sedula. A recombinant microorganism for preparing 3-HP additionally has NADPH generation.
Abstract:
PURPOSE: A gene which enhances metabolic rate of galactose is provided to enhance productivity of bioalcohol from biomass. CONSTITUTION: A gene which enhances metabolic rate of galactose is formed by losing whole or partial expression suppressing domain in a regulatory gene which suppresses expression of galactose matobolic gene. The regulatory gene is a gene encoding a TUP1 protein. A domain suppressing expression of the gene is a C-terminal repressor domain. The regulatory gene has a polynucleotide sequence of sequence number 1. The TUP1 protein has an amino acid sequence of sequence number 2. A pRS424 recombinant vector contains the of sequence number 1. A transformed recombinant microorganism is prepared using the recombinant vector. The microorganism is yeast. The recombinant microorganism is Saccharomyces cerevisiae CEN.PK2-1D/pRS424-truncated TUP1 of deposit number KCTC 11387 BP.