Process for efficiently producing transglutaminase through DNA recombination
First Claim
1. A process for producing a transglutaminase, which comprises incubating E. coli comprising a gene encoding a heat shock protein DnaJ and a gene encoding a transglutaminase, wherein each of said genes is operably linked in proper reading frame to sequences which direct the expression of each gene such that expression of the DnaJ gene is enhanced and the transglutaminase produced is biologically active and is present in soluble form at a level higher than that of transglutaminase expressed in E. coli in which expression of the DnaJ gene is not enhanced, and collecting the transglutaminase from said E. coli.
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Abstract
The present invention relates to a process for producing a transglutaminase, which comprises incubating Escherichia coli expressing genes encoding a heat shock protein (DnaJ) and a transglutaminase. The transglutaminase is produced in large quantities, at low cost and has the appropriate stereostructure to render the transglutaminase biologically active. The transglutaminase so produced is useful in the food industry.
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Citations
25 Claims
- 1. A process for producing a transglutaminase, which comprises incubating E. coli comprising a gene encoding a heat shock protein DnaJ and a gene encoding a transglutaminase, wherein each of said genes is operably linked in proper reading frame to sequences which direct the expression of each gene such that expression of the DnaJ gene is enhanced and the transglutaminase produced is biologically active and is present in soluble form at a level higher than that of transglutaminase expressed in E. coli in which expression of the DnaJ gene is not enhanced, and collecting the transglutaminase from said E. coli.
- 20. An E. coli transformed with sequences encoding a non-E. coli transglutaminase and a heat shock protein DnaJ, wherein expression of said DnaJ is enhanced.
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22. An E. coli which naturally expresses an enhanced level of DnaJ transformed with sequences encoding a non-E. coli transglutaminase and a heat shock protein DnaK.
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23. An E. coli which naturally expresses an enhanced level of DnaJ transformed with sequences encoding a transglutaminase and GroESL.
- 24. An E. coli transformed with sequences encoding a transglutaminase and heat shock proteins DnaJ and DnaK, wherein expression of DnaJ is enhanced.
Specification