Keyword search (4,163 papers available)

"Nasr MA" Authored Publications:

Title Authors PubMed ID
1 Functional and structural characterization of an IclR family transcription factor for the development of dicarboxylic acid biosensors Pham C; Nasr MA; Skarina T; Di Leo R; Kwan DH; Martin VJJ; Stogios PJ; Mahadevan R; Savchenko A; 38696354
BIOLOGY
2 Divergent directed evolution of a TetR-type repressor towards aromatic molecules Nasr MA; Martin VJJ; Kwan DH; 37377432
BIOLOGY
3 A Synthetic Biosensor for Detecting Putrescine in Beef Samples Selim AS; Perry JM; Nasr MA; Pimprikar JM; Shih SCC; 36356104
BIOLOGY
4 A Versatile Transcription Factor Biosensor System Responsive to Multiple Aromatic and Indole Inducers Nasr MA; Timmins LR; Martin VJJ; Kwan DH; 35316041
CHEMBIOCHEM
5 A platform for glycoengineering a polyvalent pneumococcal bioconjugate vaccine using E. coli as a host. Harding CM, Nasr MA, Scott NE, Goyette-Desjardins G, Nothaft H, Mayer AE, Chavez SM, Huynh JP, Kinsella RL, Szymanski CM, Stallings CL, Segura M, Feldman MF 30792408
BIOLOGY

 

Title:A Synthetic Biosensor for Detecting Putrescine in Beef Samples
Authors:Selim ASPerry JMNasr MAPimprikar JMShih SCC
Link:https://pubmed.ncbi.nlm.nih.gov/36356104/
DOI:10.1021/acsabm.2c00824
Publication:ACS applied bio materials
Keywords:biogenic aminesbiosensorcell-free transcription-translationdiaminesgene circuitmeat spoilagepaper-based sensor
PMID:36356104 Category: Date Added:2022-11-10
Dept Affiliation: BIOLOGY
1 Department of Biology, Concordia University, 7141 Sherbrooke Street West, Montréal, QuébecH4B 1R6, Canada.
2 Centre for Applied Synthetic Biology, Concordia University, 7141 Sherbrooke Street West, Montréal, QuébecH4B 1R6, Canada.
3 Department of Electrical and Computer Engineering, Concordia University, 1455 de Maisonneuve Blvd. West, Montréal, QuébecH3G 1M8, Canada.

Description:

Biogenic amines (BAs) are toxicological risks present in many food products. Putrescine is the most common foodborne BA and is frequently used as a quality control marker. Currently, there is a lack of regulation concerning safe putrescine limits in food as well as outdated food handling practices leading to unnecessary putrescine intake. Conventional methods used to evaluate BAs in food are generally time-consuming and resource-heavy with few options for on-site analysis. In response to this challenge, we have developed a transcription factor-based biosensor for the quantification of putrescine in beef samples. In this work, we use a naturally occurring putrescine responsive repressor-operator pair (PuuR-puuO) native to Escherichia coli. Moreover, we demonstrate the use of the cell-free putrescine biosensor on a paper-based device that enables rapid low-cost detection of putrescine in beef samples stored at different temperatures. The results presented demonstrate the potential role of using paper-based biosensors for on-site testing, particularly as an index for determining meat product stability and quality.





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