Patents by Inventor Sigeyuki Yokoyama

Sigeyuki Yokoyama 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 kanamycin nucleotidyltransferase and a method of screening thermophilic bacteria using the same
    Publication number: 20040077016
    Abstract: To obtain a selective marker suitable for screening of thermophilic bacteria such as Thermus thermophilus. T. thermophilus are good research materials for investigating the interrelation between enzyme structures and functions since they are stable at extreme pH, crystallize easily and are easy-to-handle.
    Type: Application
    Filed: November 24, 2003
    Publication date: April 22, 2004
    Applicant: RIKEN
    Inventors: Sigeyuki Yokoyama, Jun Hoseki, Takato Yano, Yoshinori Koyama, Seiki Kuramitsu, Hiroyuki Kagamiyama
  • Mutant kanamycin nucleotidyltransferases from S. aureus
    Patent number: 6723543
    Abstract: It is desirable to have selective markers suitable for screening of thermophilic bacteria such as Thermus thermophilus. T. thermophilus are good research materials for investigating the interrelation between enzyme structures and functions since they are stable at extreme pH, crystallize easily and are easy-to-handle. Novel mutants of Staphylococcus aureus kanamydn nucleotidyltransferase with markedly improved thermostability are disclosed, as well as a selective marker using the same, and a screening method for thermophilic bacteria such as T. thermophilus using said selective marker.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: April 20, 2004
    Assignee: Riken
    Inventors: Sigeyuki Yokoyama, Jun Hoseki, Takato Yano, Yoshinori Koyama, Seiki Kuramitsu, Hiroyuki Kagamiyama