Cloned (Comment) | Organism |
---|---|
gene LYR, functional recombinant expression in Escherichia coli strain BL21(DE3), showing high lysine racemase activity. L-Lysine is rapidly racemized to give DL-lysine, and the D-lysine yield is approximately 48% after 0.5 h | Proteus mirabilis |
Protein Variants | Comment | Organism |
---|---|---|
additional information | for D-lysine production, a two-step process for D-lysine production from L-lysine by the successive microbial racemization and asymmetric degradation with lysine racemase and decarboxylase is developed. L-lysine is rapidly racemized to give DL-lysine, and L-lysine is selectively catabolized to generate cadaverine by lysine decarboxylase. In order to obtain enantiopure D-lysine, chiral selective degradation of L-lysine from the reaction mixture of DL-lysine is necessary. Under optimal conditions, 750.7 mmol/l D-lysine is finally obtained from 1710 mmol/l L-lysine after 1 h of racemization reaction and 0.5 h of decarboxylation reaction. D-lysine yield can reach 48.8% with enantiomeric excess of 99% or more | Proteus mirabilis |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
additional information | the addition of metal ions including Ca2+, Co2+, Fe2+, Fe3+, K+, Ni2+, Mg2+, Mn2+, Cu2+, and Zn2+ at 1 mM has no significant effect on LYR activity | Proteus mirabilis |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
L-lysine | Proteus mirabilis | - |
D-lysine | - |
r | |
L-lysine | Proteus mirabilis BCRC10725 | - |
D-lysine | - |
r |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Proteus mirabilis | - |
- |
- |
Proteus mirabilis BCRC10725 | - |
- |
- |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
L-lysine | - |
Proteus mirabilis | D-lysine | - |
r | |
L-lysine | - |
Proteus mirabilis BCRC10725 | D-lysine | - |
r |
Subunits | Comment | Organism |
---|---|---|
? | x * 45000, recombinant enzyme, SDS-PAGE | Proteus mirabilis |
Synonyms | Comment | Organism |
---|---|---|
lyr | - |
Proteus mirabilis |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
37 | - |
recombinant enzyme | Proteus mirabilis |
Temperature Minimum [°C] | Temperature Maximum [°C] | Comment | Organism |
---|---|---|---|
20 | 50 | activity range, recombinant enzyme, profile overview | Proteus mirabilis |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
7 | - |
recombinant enzyme | Proteus mirabilis |
pH Minimum | pH Maximum | Comment | Organism |
---|---|---|---|
4 | 8 | activity range, recombinant enzyme, profile overview | Proteus mirabilis |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
pyridoxal 5'-phosphate | required, addition of pyridoxal 5'-phosphate cannot further improve the specific activity of the recombinant whole-cell BL21?LYR | Proteus mirabilis |