pEXP3-DEST载体主要特点及功能 The Expressway Lumio Expression and Detection System takes advantage of the Lumio recognition sequence, a small, six amino acid sequence (Cys-Cys-Pro-Gly-Cys-Cys). The Lumio detection reagent binds the recognition sequence with high specificity and affinity, resulting in a bright fluorescent signal for real-time protein production analysis and immediate in-gel protein detection. In addition, Expressway’s specialized E. coli lysate, derived from a slyD mutant, eliminates nonspecific binding of the Lumio Green Detection Reagent to the endogenous SlyD protein and provides optimal background for detection of recombinant proteins (Figure 1). The Lumio Green Detection Kit is included in the system for real-time detection of protein synthesis as well as easy in-gel protein detection. The Lumio vectors (Figures 2 and 3) also feature:
attR sites for efficient recombination with any attL-flanked Gateway entry vector
N-terminal Lumio tag (pEXP3-DEST vector) with TEV cleavage site for efficient removal of the Lumio sequence following purification
C-terminal Lumio tag (pEXP4-DEST vector) for easy, and immediate in-gel detection
T7 promoter, ribosome binding site, and T7 terminator optimally spaced for cell-free protein expression Lumio 检测技术 Expressway Tag-On-Demand Cell-Free E. coliExpression System with Lumio Technology enables convenient, in vitro expression of tagged or untagged protein from a single vector, real-time detection of protein synthesis, and easy in-gel protein detection. With this system, you can:
Quickly screen for expression levels of full-length protein
Save time and effort by cloning only once to express tagged or native protein
Express a C-terminally tagged protein from an Ultimate ORF Clone in an in vitro system
The Expressway Tag-On-Demand System includes a specialized E. colilysate derived from a slyD mutant for cell-free synthesis. This lysate eliminates non-specific binding of the Lumio Green Detection Reagent to the endogenous SlyD protein, providing an optimal background for recombinant protein detection.
How it works
Simply clone your gene of interest containing a TAG (amber) stop codon into the provided pEXP4-DEST (Figure 1). The pEXP4-DEST vector features attR sites for efficient Gateway recombination, C-terminal Lumio and 6xHis tags for simplified identification and purification, and components for cell-free protein synthesis. In the presence of the Expressway Tag-On-Demand Suppressor tRNA, the TAG codon is not recognized and translation continues through the Lumio and 6xHis tags. In the absence of the Suppressor tRNA, the TAG stop codon is recognized and native protein is produced (Figure 2). From the same vector, you can rapidly determine the expression level of the C-terminal-tagged, full-length protein, and then express the native protein free from any adverse affects the tag may have on its structure, activity, or molecular interactions.
