skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Development of a Cell-Based Fluorescence Resonance Energy Transfer Reporter for Bacillus anthracis Lethal Factor Protease

Journal Article · · Analytical Biochemistry

We report the construction of a cell-based fluorescent reporter for anthrax lethal factor (LF) protease activity using the principle of fluorescence resonance energy transfer (FRET). This was accomplished by engineering an Escherichia coli cell line to express a genetically encoded FRET reporter and LF protease. Both proteins were encoded in two different expression plasmids under the control of different tightly controlled inducible promoters. The FRET-based reporter was designed to contain a LF recognition sequence flanked by the FRET pair formed by CyPet and YPet fluorescent proteins. The length of the linker between both fluorescent proteins was optimized using a flexible peptide linker containing several Gly-Gly-Ser repeats. Our results indicate that this FRET-based LF reporter was readily expressed in E. coli cells showing high levels of FRET in vivo in the absence of LF. The FRET signal, however, decreased 5 times after inducing LF expression in the same cell. These results suggest that this cell-based LF FRET reporter may be used to screen genetically encoded libraries in vivo against LF.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
940510
Report Number(s):
UCRL-JRNL-230670; ANBCA2; TRN: US200824%%73
Journal Information:
Analytical Biochemistry, Vol. 369, Issue 1; ISSN 0003-2697
Country of Publication:
United States
Language:
English

References (46)

Anthrax toxin edema factor: a bacterial adenylate cyclase that increases cyclic AMP concentrations of eukaryotic cells. journal May 1982
Anthrax toxin lethal factor contains a zinc metalloprotease consensus sequence which is required for lethal toxin activity journal September 1994
Stop the killer: how to inhibit the anthrax lethal factor metalloprotease journal June 2004
Identification of the cellular receptor for anthrax toxin journal November 2001
Human capillary morphogenesis protein 2 functions as an anthrax toxin receptor journal April 2003
Crystal structure of a complex between anthrax toxin and its host cell receptor journal July 2004
Proteolytic activation of bacterial toxins by eukaryotic cells is performed by furin and by additional cellular proteases. journal January 1995
Macrophage Apoptosis by Anthrax Lethal Factor Through p38 MAP Kinase Inhibition journal August 2002
Anthrax Lethal Toxin Induces Human Endothelial Cell Apoptosis journal January 2004
Impairment of dendritic cells and adaptive immunity by anthrax lethal toxin journal July 2003
Efficient synthetic inhibitors of anthrax lethal factor journal June 2005
The discovery of a potent and selective lethal factor inhibitor for adjunct therapy of anthrax infection journal February 2006
Phage display in the study of infectious diseases journal March 2006
Lethal Factor Active-Site Mutations Affect Catalytic Activity In Vitro journal May 1998
Proteolytic Inactivation of MAP-Kinase-Kinase by Anthrax Lethal Factor journal May 1998
Susceptibility of mitogen-activated protein kinase kinase family members to proteolysis by anthrax lethal factor journal December 2000
Progress in rapid screening of Bacillus anthracis lethal factor activity journal May 2002
Screening inhibitors of anthrax lethal factor journal July 2002
Preparation of Peptide p -Nitroanilides Using an Aryl Hydrazine Resin journal October 2004
Novel Small-Molecule Inhibitors of Anthrax Lethal Factor Identified by High-Throughput Screening journal August 2006
A guide to choosing fluorescent proteins journal November 2005
The Fluorescent Toolbox for Assessing Protein Location and Function journal April 2006
Evolutionary optimization of fluorescent proteins for intracellular FRET journal February 2005
Protease specificity determination by using cellular libraries of peptide substrates (CLiPS) journal May 2006
FRETting for a more detailed interactome journal February 2007
Biosynthesis of a Head-to-Tail Cyclized Protein with Improved Biological Activity journal June 1999
Production of cyclic peptides and proteins in vivo journal November 1999
Peptide cyclization catalysed by the thioesterase domain of tyrocidine synthetase journal September 2000
Biomimetic synthesis and optimization of cyclic peptide antibiotics journal August 2002
Expressed Protein Ligation: A New Tool for the Biosynthesis of Cyclic Polypeptides journal November 2005
Biosynthesis of the Cyclotide Kalata B1 by Using Protein Splicing journal January 2006
Retrocyclins Kill Bacilli and Germinating Spores of Bacillus anthracis and Inactivate Anthrax Lethal Toxin journal October 2006
Human  -defensins neutralize anthrax lethal toxin and protect against its fatal consequences journal March 2005
Inhibition of the Proteolytic Activity of Anthrax Lethal Factor by Aminoglycosides journal March 2004
The structural basis for substrate and inhibitor selectivity of the anthrax lethal factor journal December 2003
Solid phase peptide synthesis utilizing 9-fluorenylmethoxycarbonyl amino acids journal March 1990
Quantitative monitoring of solid-phase peptide synthesis by the ninhydrin reaction journal October 1981
Intracellular protein interaction mapping with FRET hybrids journal November 2006
Crystal structure of the anthrax lethal factor journal November 2001
Quantitative Understanding of the Energy Transfer between Fluorescent Proteins Connected via Flexible Peptide Linkers journal November 2006
Variation of Linker Length in Ratiometric Fluorescent Sensor Proteins Allows Rational Tuning of Zn(II) Affinity in the Picomolar to Femtomolar Range journal March 2007
Origin of replication of Escherichia coli plasmid RSF 1030 journal October 1982
Mapping structural interactions using in-cell NMR spectroscopy (STINT-NMR) journal January 2006
Spontaneous cAMP-dependent derepression of gene expression in stationary phase plays a role in recombinant expression instability journal March 1998
Preparation of uniformly labeled NMR samples in Escherichia coli under the tight control of the araBAD promoter: expression of an archaeal homolog of the RNase P Rpp29 protein journal April 2003
Sunflower Trypsin Inhibitor-1 journal October 2004

Similar Records

FRET Imaging of Diatoms Expressing a Biosilica-Localized Ribose Sensor
Journal Article · Wed Mar 21 00:00:00 EDT 2012 · PLoS One · OSTI ID:940510

Plasmids encoding therapeutic agents
Patent · Tue Aug 07 00:00:00 EDT 2007 · OSTI ID:940510

Recombinant expression and purification of a tumor-targeted toxin in Bacillus anthracis
Journal Article · Fri Jan 04 00:00:00 EST 2013 · Biochemical and Biophysical Research Communications · OSTI ID:940510