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2016 ; 11
(1
): 61-8
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Construction of Lasso Peptide Fusion Proteins
#MMPMID26492187
Zong C
; Maksimov MO
; Link AJ
ACS Chem Biol
2016[Jan]; 11
(1
): 61-8
PMID26492187
show ga
Lasso peptides are a family of ribosomally synthesized and post-translationally
modified peptides (RiPPs) typified by an isopeptide-bonded macrocycle between the
peptide N-terminus and an aspartate or glutamate side chain. The C-terminal
portion of the peptide threads through the N-terminal macrocycle to give the
characteristic lasso fold. Because of the inherent stability, both proteolytic
and often thermal, of lasso peptides, we became interested in whether proteins
could be fused to the free C-terminus of lasso peptides. Here, we demonstrate
fusion of two model proteins, the artificial leucine zipper A1 and the
superfolder variant of GFP, to the C-terminus of the lasso peptide astexin-1.
Successful lasso cyclization of the N-terminus of these fusion proteins requires
a flexible linker in between the C-terminus of the lasso peptide and the
N-terminus of the protein of interest. The ability to fuse lasso peptides to a
protein of interest is an important step toward phage and bacterial display
systems for the high-throughput screening of lasso peptide libraries for new
functions.