Patents by Inventor Ekaterina Sergeevna Preobrazhenskaya

Ekaterina Sergeevna Preobrazhenskaya has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Mutant acetolactate synthase and a method for producing branched-chain L-amino acids
    Patent number: 9279137
    Abstract: A mutant bacterial acetolactate synthase (AHAS I) which is resistant to feedback inhibition by L-valine is described. Also described is a method for producing branched-chain L-amino acids using a bacterium from the Enterobacteriaceae family wherein the L-amino acid productivity of said bacterium is enhanced by the use of the acetolactate synthase (AHAS I) which is resistant to feedback inhibition by L-valine. This acetolactate synthase contains a mutant small subunit encoded by the mutant ilvN gene.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: March 8, 2016
    Assignee: AJINOMOTO CO., INC.
    Inventors: Elena Viktorovna Sycheva, Vsevolod Aleksandrovich Serebryanyy, Tatyana Abramovna Yampolskaya, Ekaterina Sergeevna Preobrazhenskaya, Natalia Viktorovna Stoynova
  • Mutant Acetolactate Synthase and a Method for Producing Branched-Chain L-Amino Acids
    Publication number: 20140335574
    Abstract: A mutant bacterial acetolactate synthase (AHAS I) which is resistant to feedback inhibition by L-valine is described. Also described is a method for producing branched-chain L-amino acids using a bacterium from the Enterobacteriaceae family wherein the L-amino acid productivity of said bacterium is enhanced by the use of the acetolactate synthase (AHAS I) which is resistant to feedback inhibition by L-valine. This acetolactate synthase contains a mutant small subunit encoded by the mutant ilvN gene.
    Type: Application
    Filed: July 17, 2014
    Publication date: November 13, 2014
    Applicant: AJINOMOTO CO., INC.
    Inventors: Elena Viktorovna Sycheva, Vsevolod Aleksandrovich Serebryanyy, Tatyana Abramovna Yampolskaya, Ekaterina Sergeevna Preobrazhenskaya, Natalia Viktorovna Stoynova
  • Mutant Acetolactate Synthase and a Method for Producing Branched-Chain L-Amino Acids
    Publication number: 20090197309
    Abstract: A mutant bacterial acetolactate synthase (AHAS I) which is resistant to feedback inhibition by L-valine is described. Also described is a method for producing branched-chain L-amino acids using a bacterium from the Enterobacteriaceae family wherein the L-amino acid productivity of said bacterium is enhanced by the use of the acetolactate synthase (AHAS I) which is resistant to feedback inhibition by L-valine. This acetolactate synthase contains a mutant small subunit encoded by the mutant ilvN gene.
    Type: Application
    Filed: September 13, 2007
    Publication date: August 6, 2009
    Inventors: Elena Viktorovna Sycheva, Vsevolod Aleksandrovich Serebryanyy, Tatyana Abramovna Yampolskaya, Ekaterina Sergeevna Preobrazhenskaya, Natalia Viktorovna Stoynova
  • Method for producing uridine-5'-monophosphate by fermentation using mutant strains of coryneform bacteria
    Patent number: 6344344
    Abstract: Uridine-5′-monophosphate is produced by cultivating in a nutrient medium an uridine-5′-monophosphate producing mutant of coryneform bacterium and which is characterized by at least a resistance to growth inhibition by pyrimidine analogue or a deficiency in uridine degrading activity or combination of said property by protoplast fusion. This method has the advantage of decreased production of uracil. Thus, uridine-5′-monophosphate can be produced in much greater yields, compared with known methods.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: February 5, 2002
    Assignee: Ajinomoto Co., Inc.
    Inventors: Lyudmila Anatolievna Kazarinova, Vitaliy Arkadievich Livshits, Ekaterina Sergeevna Preobrazhenskaya, Irina Mikhailovna Starovoytova