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<p style="text-align: justify;">Lab-on-a-disc is a concept of a&nbsp;screening method for our MAGE method to distinguish bacterial colonies producing non-ribosomal peptides (NRPs) of interest. Simple technology and science behind this has a potential to screen a few&nbsp;bacterial cultures at the same time.&nbsp;</p>
  
 
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<p>When one method fails the Synthesizers&nbsp;come&nbsp;up with a new idea! Alternative approach&nbsp;of generating short cyclized peptides with similar length to tyrocidine&nbsp;by using self-splicing proteins.<em> </em>Inteins are such short self-splicing proteins that have no function&nbsp;in the proteins they are a part of, besides catalyzing&nbsp;their own&nbsp;excision after translation. The splicing makes a peptide bond between the two&nbsp;adjacent amino acids next to the inteins.</p>
  
 
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Revision as of 23:57, 18 September 2015


Overview


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Project

Introduction

Over the summer we worked with nonribosomal peptide synthetases (NRPSs). We developed a B. subtilis strain capable of oligo-mediated genome engineering and used this strain to alter a NRPS. We also investigated methods of screening for novel products with desired activities.

Background

Nonribosomal peptide synthases (NRPSs) are large multimodular enzymes that synthesize nonribosomal peptides, which are short bioactive peptides with a broad range of functions, including antibiotics, immunosuppressants and anticancer drugs.

MAGE subtilis

Multiplex automated genome engineering (MAGE) utilises cyclical recombination with short oligonucleotides in order to achieve a high allelic replacement efficiency and can be used to quickly generate cell populations with varying phenotypes. We introduced oligo-mediated genome engineering into Bacillus subtilis.

Surfactin

In order to verify that we could alter specificities of nonribosomal peptide synthetases to produce novel compounds, we used oligo-mediated recombineering to alter the surfactin peptide of B. subtilis.

Tyrocidine

Tyrocidine is a mixture of non-ribosomal peptides. It can only be used topically due to its toxicity. We sought to express the tyrocidine synthase cluster in B. subtilis to make novel derivatives with oligo-mediated recombineering.

Lab-on-a-disc

Lab-on-a-disc is a concept of a screening method for our MAGE method to distinguish bacterial colonies producing non-ribosomal peptides (NRPs) of interest. Simple technology and science behind this has a potential to screen a few bacterial cultures at the same time. 

Intein

When one method fails the Synthesizers come up with a new idea! Alternative approach of generating short cyclized peptides with similar length to tyrocidine by using self-splicing proteins. Inteins are such short self-splicing proteins that have no function in the proteins they are a part of, besides catalyzing their own excision after translation. The splicing makes a peptide bond between the two adjacent amino acids next to the inteins.

Detection of NRP

Detection

Technical University of Denmark
Department of Systems Biology
Søltofts Plads 221
2800 Kgs. Lyngby
Denmark
P: +45 45 25 25 25
M: dtu-igem-2015@googlegroups.com