Difference between revisions of "Part:BBa K4119002"

Revision as of 04:07, 14 October 2022

flavin mononucleotide (FMN)-dependent fluorescent protein Bs2

Bs2 is one of the flavin mononucleotide (FMN)-based fluorescent proteins. We use 450nm as excited wavelength and 500nm as absorption of emission wavelength.

Results

In our project, the key promoter vgb was a microaerobic induced promoter of Vitreoscilla hemoglobin gene. Considering the gene compatibility difference between different host bacteria, we designed the pMTL-Pvgb-bs2 plasmid to determine whether the promoter vgb could work normally in Clostridium tyrobutyricum by detecting the fluorescent expression intensity of fluorescent protein Bs2.
The green fluorescent protein (GFP) has been one of the most widely used reporter in bioprocess monitoring of gene expression. However, they are not functional under anaerobic conditions, and thus cannot be employed as reporters in Clostridium. A series of flavin mononucleotide (FMN)-based fluorescent proteins (FbFPs) have been reported, which could exhibit strong signals in the absence of O2. FbFPs have been successfully used as a fluorescent label in anaerobic or facultative anaerobic bacteria, including several species of Clostridium for monitoring of protein expression, evaluation of promoter strength, and for proof-of-concept demonstration of transcriptional repression, etc.

Sequence and Features