TRANSFORMANT HAVING TRYPTOPHANASE PRODUCTIVITY AND PRODUCTION OF L-TRYPTOPHAN

摘要

PURPOSE:To obtain the subject transformant of a bacterium belonging to Providencia genus producing an enzyme capable of converting pyruvic acid or L-serine to L-tryptophan in a high efficiency by carrying out transformation using a DNA containing a gene controlling tryptophanase production. CONSTITUTION:A gene controlling tryptophanase production is subjected to self-cloning using P.rettgeri plasmid to form a complex plasmid having the gene controlling tryptophanase production. Using the resultant complex plasmid, a bacterium belonging to Providencia genus is transformed.