1. L-Norvaline and L-homoisoleucine formation by Serratia marcescens,.
- Author
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Kisumi M, Sugiura M, Kato J, and Chibata I
- Subjects
- Isoleucine biosynthesis, Magnetic Resonance Spectroscopy, Mutation, Serratia marcescens drug effects, Species Specificity, Spectrophotometry, Infrared, Threonine pharmacology, Valine biosynthesis, Isoleucine analogs & derivatives, Serratia marcescens metabolism, Valine analogs & derivatives
- Abstract
Two unnatural amino acids were found as by-products in isoleucine fermentation from threonine by Serratia marcescens. These amino acids were identified as L-norvaline (2-aminopentanoic acid) and L-homoisoleucine (2-amino-4-methylhexanoic acid). Formation of L-norvaline and L-homoisoleucine was not observed when L-leucine was added to the medium. The leucine auxotroph derived from the isoleucine accumlator did not produce L-norvaline or L-homoisoleucine even during the accumulation of large amounts of isoleucine. It is suggested that L-norvaline and L-homoisoleucine formation is closely related to leucine biosynthesis.
- Published
- 1976
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