"
Team:Warsaw/Stage2/Background
From 2010.igem.org
| (12 intermediate revisions not shown) | |||
| Line 18: | Line 18: | ||
<p> | <p> | ||
| - | MinC is the component of MinCDE system. Together with nucleoid occlusion it ensures that cell division will occur in the middle of a cell. Three proteins – MinC, MinD and MinE play different | + | MinC is the component of MinCDE system. Together with nucleoid occlusion it ensures that cell division will occur in the middle of a cell. Three proteins – MinC, MinD and MinE play different roles in preventing formation of division complex too close to cell poles [1]. MinC is directly responsible for stopping the early stage of division by inhibiting the polymerization of FtsZ protein monomers into a structure known as the Z-ring [8].</p> |
<p>FtsZ is a tubuline homologue capable of creating chains, lariats and rings independently of other cellular factors [3]. The stability and decay of these structures is dependent on GTPase activity of FtsZ proteins [7]. At the beginning of cell division FtsZ monomers form the Z-ring to which other proteins responsible for the division are recruited. The presence of N-terminal domain of MinC prevents additional Z-rings from being established [9].</p> | <p>FtsZ is a tubuline homologue capable of creating chains, lariats and rings independently of other cellular factors [3]. The stability and decay of these structures is dependent on GTPase activity of FtsZ proteins [7]. At the beginning of cell division FtsZ monomers form the Z-ring to which other proteins responsible for the division are recruited. The presence of N-terminal domain of MinC prevents additional Z-rings from being established [9].</p> | ||
| - | <p> In bacterial cells MinC is recruited to membrane by the second protein of the system – MinD. This process involves C-terminal domain of MinC, which is also responsible for its oligomerisation. Recruitment to membrane is necessary for the inhibiting effect to occur at the physiological concentration of protein [4]. Finally the third protein MinE - is responsible for keeping the MinCD complex from acting in the midcell region, thus enabling the formation of Z-ring in the proper location [5]. | + | <center><img src="https://static.igem.org/mediawiki/2010/8/89/F3_sm.jpg"></center> |
| - | It was shown that mutants in either minC or minD divide at cell pole much more often than wild type, resulting in creation of nucleoid-free minicells. This mutations, however are not lethal because enough of the cells in population divide properly to sustain growth [6].</p> | + | <i><p> MinCDE system and nucleoid occlusion[10]. </p></i> |
| + | <p> In bacterial cells MinC is recruited to membrane by the second protein of the system – MinD. This process involves C-terminal domain of MinC, which is also responsible for its oligomerisation. Recruitment to membrane is necessary for the inhibiting effect to occur at the physiological concentration of protein [4]. Finally the third protein - MinE - is responsible for keeping the MinCD complex from acting in the midcell region, thus enabling the formation of Z-ring in the proper location [5]. | ||
| + | It was shown that mutants in either <i>minC</i> or <i>minD</i> divide at cell pole much more often than wild type, resulting in creation of nucleoid-free minicells. This mutations, however are not lethal because enough of the cells in population divide properly to sustain growth [6].</p> | ||
<div class="note">Natural occurrence:</div> | <div class="note">Natural occurrence:</div> | ||
| - | <p> Although MinCDE is mostly analysed in <i>E.coli</i>, it’s elements were found in many different bacteria groups including | + | <p> Although MinCDE is mostly analysed in <i>E.coli</i>, it’s elements were found in many different bacteria groups including <i>Proteobacteria</i>, <i>Deinococcus-Thermus</i> and <i>Firmicutes</i> <i>phyla</i> [1]. In <i>B. subtilis</i> the MinE protein is replaced by DivIVa which locates itself at the cell poles and with help of MinJ binds MinCD complex, decreasing it’s concentration at midcell [2]. </p> |
<div class="note">Application in synthetic biology:</div> | <div class="note">Application in synthetic biology:</div> | ||
<p> | <p> | ||
| - | When expressed at high level MinC is capable of preventing bacterial cell from dividing. As a result, of this the cell becomes filamentus. | + | When expressed at high level MinC is capable of preventing bacterial cell from dividing. As a result, of this the cell becomes filamentus. This effect requires only high level of MinC, not MinD. It has been proven that overexpression of C-terminal domain of MinC alone is sufficient to inhibit cell division [9]. Recent findings suggest also, that MinC originated from <i>E.coli</i> is able to function properly in <i>B.subtilis</i> and inhibit its division [11].</p> |
| Line 41: | Line 43: | ||
<p>6. “FtsZ ring cluster in min and partition mutants: Role of both the Min system and the nucleoid in regulation FtsZ ring location”, Yu et al. Mol. Microbiol. 32 (1999) 315-326</p> | <p>6. “FtsZ ring cluster in min and partition mutants: Role of both the Min system and the nucleoid in regulation FtsZ ring location”, Yu et al. Mol. Microbiol. 32 (1999) 315-326</p> | ||
<p>7. “FtsZ from Divergent Foreign Bacteria Can Function for Cell Division in Escherichia coli”, Masaki Osawa and Harold P. Erickson, J. Bacteriol. 188 (2006) 7132-7140</p> | <p>7. “FtsZ from Divergent Foreign Bacteria Can Function for Cell Division in Escherichia coli”, Masaki Osawa and Harold P. Erickson, J. Bacteriol. 188 (2006) 7132-7140</p> | ||
| - | <p>8. “FtsZ, a tubulin homologue in prokaryote division”, Trends. Cell Biol. 7 (1997) 362-367</p> | + | <p>8. “FtsZ, a tubulin homologue in prokaryote division”, Harold P. Erickson.Trends. Cell Biol. 7 (1997) 362-367</p> |
| - | <p>9. “Analysis of MinC Reveals Two Independent Domains Involved in Interaction with MinD and FtsZ”, J. Bacteriol. 182 (2000) 3965-3971</p> | + | <p>9. “Analysis of MinC Reveals Two Independent Domains Involved in Interaction with MinD and FtsZ”, Zonglin Hu and Joe Lutkenhaus, J. Bacteriol. 182 (2000) 3965-3971</p> |
| + | <p>10. "Synchronization of Chromosome Dynamics and Cell Division in Bacteria", Martin Thanbichler, doi: 10.1101/cshperspect.a000331(2009) </p> | ||
| + | <p>11. "Expression of Escherichia coli Min system in Bacillus subtilis and its effect on cell division" Nad'a Pavlendová, Katarína Muchová, Imrich Barák FEMS Microbiology Letters, 302 (2010) 58-68</p> | ||
</html> | </html> | ||
{{TemplateBottom}} | {{TemplateBottom}} | ||
Latest revision as of 15:16, 27 October 2010
MinC
MinC is the component of MinCDE system. Together with nucleoid occlusion it ensures that cell division will occur in the middle of a cell. Three proteins – MinC, MinD and MinE play different roles in preventing formation of division complex too close to cell poles [1]. MinC is directly responsible for stopping the early stage of division by inhibiting the polymerization of FtsZ protein monomers into a structure known as the Z-ring [8].
FtsZ is a tubuline homologue capable of creating chains, lariats and rings independently of other cellular factors [3]. The stability and decay of these structures is dependent on GTPase activity of FtsZ proteins [7]. At the beginning of cell division FtsZ monomers form the Z-ring to which other proteins responsible for the division are recruited. The presence of N-terminal domain of MinC prevents additional Z-rings from being established [9].
MinCDE system and nucleoid occlusion[10].
In bacterial cells MinC is recruited to membrane by the second protein of the system – MinD. This process involves C-terminal domain of MinC, which is also responsible for its oligomerisation. Recruitment to membrane is necessary for the inhibiting effect to occur at the physiological concentration of protein [4]. Finally the third protein - MinE - is responsible for keeping the MinCD complex from acting in the midcell region, thus enabling the formation of Z-ring in the proper location [5]. It was shown that mutants in either minC or minD divide at cell pole much more often than wild type, resulting in creation of nucleoid-free minicells. This mutations, however are not lethal because enough of the cells in population divide properly to sustain growth [6].
Although MinCDE is mostly analysed in E.coli, it’s elements were found in many different bacteria groups including Proteobacteria, Deinococcus-Thermus and Firmicutes phyla [1]. In B. subtilis the MinE protein is replaced by DivIVa which locates itself at the cell poles and with help of MinJ binds MinCD complex, decreasing it’s concentration at midcell [2].
When expressed at high level MinC is capable of preventing bacterial cell from dividing. As a result, of this the cell becomes filamentus. This effect requires only high level of MinC, not MinD. It has been proven that overexpression of C-terminal domain of MinC alone is sufficient to inhibit cell division [9]. Recent findings suggest also, that MinC originated from E.coli is able to function properly in B.subtilis and inhibit its division [11].
1. “Themes and variations in prokaryotic cell division”, William Margolin, FEMS Microbiology Reviews 24 (2000) 531-548
2. “The MinCDJ System in Bacillus subtilis Prevents Minicell Formation by Promoting Divisome Disassembly”, Suey van Baarle and Marc Bramkami, PLoS One. 5 (2010)
3. “The bacterial cell division protein FtsZ assembles into cytoplasmic ring in fission yeast”, Ramanujam Srinivasan et al. Genes Dev. 22 (2008) 1741-1746
4. “The Switch I and II Regions of MinD Are Required for Binding and Activating MinC”, Huaijin Zhou and Joe Lutkenhaus, J Bacteriol. 186 (2004) 1546–1555.
5. “The MinE ring required for proper placement of the division site is a mobile structure that changes its cellular location during the Escherichia coli division cycle.”, Fu X et al. Proc. Natl. Acad. Sci. U S A 98. (2001)
6. “FtsZ ring cluster in min and partition mutants: Role of both the Min system and the nucleoid in regulation FtsZ ring location”, Yu et al. Mol. Microbiol. 32 (1999) 315-326
7. “FtsZ from Divergent Foreign Bacteria Can Function for Cell Division in Escherichia coli”, Masaki Osawa and Harold P. Erickson, J. Bacteriol. 188 (2006) 7132-7140
8. “FtsZ, a tubulin homologue in prokaryote division”, Harold P. Erickson.Trends. Cell Biol. 7 (1997) 362-367
9. “Analysis of MinC Reveals Two Independent Domains Involved in Interaction with MinD and FtsZ”, Zonglin Hu and Joe Lutkenhaus, J. Bacteriol. 182 (2000) 3965-3971
10. "Synchronization of Chromosome Dynamics and Cell Division in Bacteria", Martin Thanbichler, doi: 10.1101/cshperspect.a000331(2009)
11. "Expression of Escherichia coli Min system in Bacillus subtilis and its effect on cell division" Nad'a Pavlendová, Katarína Muchová, Imrich Barák FEMS Microbiology Letters, 302 (2010) 58-68
