Activities | Families | Sequences | Fold types | References | Help
B6db references: 15256574

type Journal Article
authors Miyazaki T, Miyazaki J, Yamane H, Nishiyama M.
title alpha-Aminoadipate aminotransferase from an extremely thermophilic bacterium, Thermus thermophilus
journal Microbiology. 2004
sel selected
ui 15256574
year (2004)
volume 150
number 7
pages 2327-34
abstract The extremely thermophilic bacterium Thermus thermophilus HB27 synthesizes lysine through alpha-aminoadipate (AAA). In this study, a T. thermophilus gene encoding the enzyme that catalyses transamination of AAA was cloned as a mammalian kynurenine/AAA aminotransferase (Kat2) gene homologue. A T. thermophilus mutant with disruption of the Kat2 homologue required a longer lag phase for growth and showed slower growth in minimal medium. Furthermore, addition of AAA or lysine shortened the lag phase and improved the growth rate. The Kat2 homologue was therefore termed lysN. LysN recognizes not only 2-oxoadipate, an intermediate of lysine biosynthesis, but also 2-oxoisocaproate, 2-oxoisovalerate and 2-oxo-3-methylvalerate, intermediates of leucine, valine and isoleucine biosyntheses, respectively, along with oxaloacetate, a compound in the TCA cycle, as an amino acceptor. These results suggest multiple roles of LysN in several cellular metabolic pathways including lysine and branched-chain amino acid biosyntheses.
last changed 2009/05/04 17:39

B6db references