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B6db activities:
Description Threonine racemase
Catalyzed reaction L-threonine = D-threonine.
Cofactor Pyridoxal-phosphate.
Comments -!- Inverts both chiral centres.
The described enzyme from Pseudomonas putida (included here because cited in BRENDA) is in fact a threonine-alpha-epimerase (inversion of stereochemistry on just the alpha carbon, with production of D-allo-Thr from L-Thr).
Organisms -Eubacteria
Links Enzyme (activities)
BRENDA (activities)
KEGG (pathways)
PLPMDB (PLP mutants)
 Lim YH, Yokoigawa K, Esaki N, Soda K. (1993) A new amino acid racemase with threonine alpha-epimerase activity from Pseudomonas putida: purification and characterization J Bacteriol 175 4213-7.

 Amos, H. (1954) A racemase for threonine in Escherichia coli J Am Chem Soc 76 3858.

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last changed 2017/12/22 09:55

B6db activities