NOVEL COELENTERAZINE SUBSTRATES AND METHODS OF USE
申请人:Klaubert Dieter H.
公开号:US20120117667A1
公开(公告)日:2012-05-10
An isolated polynucleotide encoding a modified luciferase polypeptide and novel coelenterazine-based substrates. The OgLuc variant polypeptide has at least 60% amino acid sequence identity to SEQ ID NO: 1 and at least one amino acid substitution at a position corresponding to an amino acid in SEQ ID NO: 1. The OgLuc variant polypeptide has at least one of enhanced luminescence, enhanced signal stability, and enhanced protein stability relative to the corresponding polypeptide of the wild-type
Oplophorus
luciferase.
一个编码改良荧光酶多肽和新型荧光素基底底物的孤立的多聚核苷酸。OgLuc变体多肽至少具有与SEQ ID NO: 1的氨基酸序列相似性达到60%,并且至少在一个位置上具有至少一种氨基酸替换,该位置对应于SEQ ID NO: 1中的氨基酸。OgLuc变体多肽至少具有增强的发光性、增强的信号稳定性和增强的蛋白稳定性中的至少一种,相对于野生型Oplophorusluciferase的相应多肽。
Semi-rational hinge engineering: modulating the conformational transformation of glutamate dehydrogenase for enhanced reductive amination activity towards non-natural substrates
作者:Xinjian Yin、Yayun Liu、Lijun Meng、Haisheng Zhou、Jianping Wu、Lirong Yang
DOI:10.1039/c9cy02576f
日期:——
The active site is the common hotspot for rational and semi-rational enzyme activity engineering. However, the active site represents only a small portion of the whole enzyme. Identifying more hotspots other than the active site for enzyme activity engineering should aid in the development of biocatalysts with better catalytic performance. Glutamate dehydrogenases (GluDHs) are promising and environmentally
[EN] NOVEL COELENTERAZINE SUBSTRATES AND METHODS OF USE<br/>[FR] NOUVEAUX SUBSTRATS DE COELENTÉRAZINE ET PROCÉDÉS D'UTILISATION
申请人:PROMEGA CORP
公开号:WO2012061529A1
公开(公告)日:2012-05-10
An isolated polynucleotide encoding a modified luciferase polypeptide and novel coelenterazine- based substrates. The OgLuc variant polypeptide has at least 60% amino acid sequence identity to SEQ ID NO: 1 and at least one amino acid substitution at a position corresponding to an amino acid in SEQ ID NO: 1. The OgLuc variant polypeptide has at least one of enhanced luminescence, enhanced signal stability, and enhanced protein stability relative to the corresponding polypeptide of the wild-type Oplophorus luciferase.
一个编码修改后的荧光酶多肽和新型荧光素基底的孤立的多聚核苷酸。OgLuc变体多肽至少具有与SEQ ID NO: 1的氨基酸序列相同性的60%,并且至少在一个位置上具有与SEQ ID NO: 1中的氨基酸对应的氨基酸替换。相对于野生型Oplophorus荧光酶的相应多肽,OgLuc变体多肽至少具有增强的荧光、增强的信号稳定性和增强的蛋白稳定性中的至少一种。
A New Family of<scp>D</scp>-2-Hydroxyacid Dehydrogenases That Comprises<scp>D</scp>-Mandelate Dehydrogenases and 2-Ketopantoate Reductases
The gene for the d-mandelate dehydrogenase (d-ManDH) of Enterococcus faecalis IAM10071 was isolated by means of an activity staining procedure and PCR and expressed in Escherichia coli cells. The recombinant enzyme exhibited high catalytic activity toward various 2-ketoacid substrates with bulky hydrophobic side chains, particularly C3-branched substrates such as benzoylformate and 2-ketoisovalerate, and strict coenzyme specificity for NADH and NAD+. It showed marked sequence similarity with known NADP-dependent 2-ketopantoate reductases (KPR). These results indicate that together with KPR, d-ManDH constitutes a new family of d-2-hydroxyacid dehydrogenases that act on C3-branched 2-ketoacid substrates with various specificities for coenzymes and substrates.