Fe-binding and storage protein; During stationary phase, binds the chromosome non- specifically, forming a highly ordered and stable dps-DNA co-crystal within which chromosomal DNA is condensed and protected from diverse damages. It protects DNA from oxidative damage by sequestering intracellular Fe(2+) ion and storing it in the form of Fe(3+) oxyhydroxide mineral, which can be released after reduction. One hydrogen peroxide oxidizes two Fe(2+) ions, which prevents hydroxyl radical production by the Fenton reaction. Dps also protects the cell from UV and gamma irradiation, iron and cop [...]

Homoserine, homoserine lactone and S-methyl-methionine efflux pump; Conducts the efflux of homoserine and homoserine lactone. Belongs to the Rht family.

Leucine efflux protein; Exporter of leucine. Can also transport its natural analog L- alpha-amino-n-butyric acid and some other structurally unrelated amino acids.

Glutamate-1-semialdehyde aminotransferase (aminomutase).

Glutamyl tRNA reductase; Catalyzes the NADPH-dependent reduction of glutamyl-tRNA(Glu) to glutamate 1-semialdehyde (GSA). In the absence of NADPH, exhibits substrate esterase activity, leading to the release of glutamate from tRNA.

5-aminolevulinate dehydratase (porphobilinogen synthase); Catalyzes an early step in the biosynthesis of tetrapyrroles. Binds two molecules of 5-aminolevulinate per subunit, each at a distinct site, and catalyzes their condensation to form porphobilinogen; Belongs to the ALAD family.

L-threonine dehydratase, biosynthetic; Catalyzes the anaerobic formation of alpha-ketobutyrate and ammonia from threonine in a two-step reaction. The first step involved a dehydration of threonine and a production of enamine intermediates (aminocrotonate), which tautomerizes to its imine form (iminobutyrate). Both intermediates are unstable and short-lived. The second step is the nonenzymatic hydrolysis of the enamine/imine intermediates to form 2- ketobutyrate and free ammonia. In the low water environment of the cell, the second step is accelerated by RidA.

Aromatic amino acid exporter YddG; Probable efflux pump. Overexpression confers resistance to phenylalanine and increases export of phenylalanine, tyrosine and tryptophan; Belongs to the drug/metabolite transporter (DMT) superfamily. Aromatic amino acid/paraquat exporter (ArAA/P-E) (TC 2.A.7.17) family.

Cysteine and O-acetyl-L-serine efflux system; May be an export pump for cysteine and other metabolites of the cysteine pathway (such as N-acetyl-L-serine (NAS) and O-acetyl-L- serine (OAS)), and for other amino acids and their metabolites. Belongs to the EamA transporter family.