Back to Search
Start Over
A novel family of bacterial dioxygenases that catalyse the hydroxylation of free l-amino acids.
- Source :
- FEMS Microbiology Letters; Jun2012, Vol. 331 Issue 2, p97-104, 8p
- Publication Year :
- 2012
-
Abstract
- l-isoleucine-4-hydroxylase ( IDO) is a recently discovered member of the Pfam family PF10014 (the former DUF 2257 family) of uncharacterized conserved bacterial proteins. To uncover the range of biochemical activities carried out by PF10014 members, eight in silico-selected IDO homologues belonging to the PF10014 were cloned and expressed in Escherichia coli. l-methionine, l-leucine, l-isoleucine and l-threonine were found to be catalysed by the investigated enzymes, producing l-methionine sulfoxide, 4-hydroxyleucine, 4-hydroxyisoleucine and 4-hydroxythreonine, respectively. An investigation of enzyme kinetics suggested the existence of a novel subfamily of bacterial dioxygenases within the PF10014 family for which free l-amino acids could be accepted as in vivo substrates. A hypothesis regarding the physiological significance of hydroxylated l-amino acids is also discussed. [ABSTRACT FROM AUTHOR]
- Subjects :
- AMINO acids
BACTERIAL proteins
ESCHERICHIA coli
ENZYME kinetics
METHIONINE
Subjects
Details
- Language :
- English
- ISSN :
- 03781097
- Volume :
- 331
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- FEMS Microbiology Letters
- Publication Type :
- Academic Journal
- Accession number :
- 75275373
- Full Text :
- https://doi.org/10.1111/j.1574-6968.2012.02558.x