| RRC ID |
59096
|
| 著者 |
Liu Y, Li Q, Wang L, Guo X, Wang J, Wang Q, Zhao ZK.
|
| タイトル |
Engineering d-Lactate Dehydrogenase to Favor an Non-natural Cofactor Nicotinamide Cytosine Dinucleotide.
|
| ジャーナル |
Chembiochem
|
| Abstract |
Synthetic nicotinamide adenine dinucleotide (NAD) analogues are of great scientific and biotechnological interest. One such analogue, nicotinamide cytosine dinucleotide (NCD), has been successfully applied to creating bioorthogonal redox systems. Yet, only a few redox enzymes have been devised to favor NCD. We have engineered Lactobacillus helveticus-derived NAD-dependent d-lactate dehydrogenase (LhDLDH) to favor NCD by semirational design. Sequence alignment and structural analysis revealed that amino acid residues I177 and N213 form a "gate" guarding the NAD adenine moiety binding cavity. Saturated mutagenesis libraries were constructed by using the mutant LhDLDH-V152R as the parental sequence. Mutants were obtained with good catalytic efficiency, and NCD preference increased by up to 940-fold. Experiments showed that Escherichia coli cells expressing mutants with higher NCD preference afforded much less d-lactate, thus suggesting the potential to construct NCD-mediated orthogonal metabolism.
|
| 巻・号 |
21(14)
|
| ページ |
1972-1975
|
| 公開日 |
2020-7-16
|
| DOI |
10.1002/cbic.201900766
|
| PMID |
32175634
|
| MeSH |
Amino Acid Sequence
Lactate Dehydrogenases / chemistry
Lactate Dehydrogenases / genetics
Lactate Dehydrogenases / metabolism*
Lactobacillus helveticus / enzymology
Models, Molecular
Molecular Conformation
Mutation
NAD / biosynthesis*
NAD / chemistry
Protein Engineering*
Sequence Alignment
|
| IF |
2.641
|
| 引用数 |
0
|
| リソース情報 |
| 原核生物(大腸菌) |
BW25113 |
