Team:LMU-Munich/Bacillus Introduction

From 2012.igem.org

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'''1)''' ''B. subtilis'' is able to differentiate into cells with different morphology and function ('''Fig. 1'''), the most severe form being the endospore which is formed under stress conditions. But there are also phenomena like cannibalism which makes ''B. subtilis'' a lot more diverse to work with. We will exploit the production of endospores in our project '''Bead'''zillus. The life cycle of ''B. subtilis'' is depicted in '''Fig. 2'''.
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'''1)''' ''B. subtilis'' is able to differentiate into cells with different morphology and function ('''Fig. 1'''), the most severe form being the endospore which is produced under stress conditions. But there are also phenomena like cannibalism which makes ''B. subtilis'' a lot more diverse to work with. We will exploit the production of endospores in our project '''Bead'''zillus. The life cycle of ''B. subtilis'' is depicted in Fig. 2.
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'''2)''' ''B. subtilis'' can replicate exogenic DNA via an origin of replication on a plasmid as ''E. coli'' does, but there is a much more elegant way of bringing in exogenic DNA stretches. When flanked by homologous regions to the bacterial genome, it will integrate at high efficiency via homologous recombination at this locus and furthermore be replicated with the genome. This has the advantage that if comparing different things, not only the enviroment is always the same, but also the copy number is from cell to cell and from strain to strain the same, which is not always the case for replicative plasmids. This integrative way of bringing in exogenic DNA will be exploited by us when producing the BioBrick compatible ''Bacillus'' vectors. The comparision between these two ways of bringing in exogenic DNA  is depicted in Fig. 3.
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'''2)''' ''B. subtilis'' can replicate exogenous DNA via an origin of replication on a plasmid as ''E. coli'' does, but there is a much more elegant way of bringing in exogenous DNA stretches. When flanked by homologous regions to the bacterial genome, it will integrate at high efficiency via homologous recombination at this locus and furthermore be replicated with the genome. This has the advantage that if comparing different variables, not only the enviroment is always the same, but also the copy number is from cell to cell and from strain to strain the same, which is not always the case for replicative plasmids. This integrative way of bringing in exogenous DNA was exploited by us when producing the BioBrick compatible ''Bacillus'' vectors. The comparision between these two ways of bringing in exogenous DNA  is depicted in Fig. 3.
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For these reasons in some cases ''B. subtilis'' can be the chassis of choice. Sadly very few teams have worked with this model organism and there is at this time no established BioBrick system to use ''B. subtilis'' as a chassis.
For these reasons in some cases ''B. subtilis'' can be the chassis of choice. Sadly very few teams have worked with this model organism and there is at this time no established BioBrick system to use ''B. subtilis'' as a chassis.

Revision as of 14:56, 26 September 2012

iGEM Ludwig-Maximilians-Universität München Beadzillus

Bacillus in urban culture.jpg

The LMU-Munich team is exuberantly happy about the great success at the World Championship Jamboree in Boston. Our project Beadzillus finished 4th and won the prize for the "Best Wiki" (with Slovenia) and "Best New Application Project".

IGEM HQ LMU prize.jpg

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