ABSTRACT
For the ornithine fermentation pathway, described more than 70 years ago, genetic and biochemical information are still incomplete. We present here the experimental identification of the last four missing genes of this metabolic pathway. They encode
l
-ornithine racemase, (2
R
,4
S
)-2,4-diaminopentanoate dehydrogenase, and the two subunits of 2-amino-4-ketopentanoate thiolase. While described only for the
Clostridiaceae
to date, this pathway is shown to be more widespread.
摘要
对于 70 多年前描述的鸟氨酸发酵途径,遗传和生化信息仍然不完整。在此,我们通过实验确定了这一代谢途径中最后四个缺失的基因。它们编码
l
-鸟氨酸消旋酶、(2
R
,4
S
)-2,4-二氨基戊酸脱氢酶,以及 2-氨基-4-酮戊酸硫醇酶的两个亚基。虽然只描述了
梭菌属
迄今为止,这种途径被证明更为普遍。