Difference between revisions of "Part:BBa K3198007"
Line 8: Line 8:
  
 
===Description===
 
===Description===
−
<br><br>This part contains the toxin component of a type II toxin-antitoxin (TA) system. HicA is a probable translation-independent mRNA interferase.  
+
This part contains the toxin component of a type II toxin-antitoxin (TA) system. HicA is a probable translation-independent mRNA interferase.  
 
<br><br>Bacterial lux operons encodes five enzymes involved in the light-generating pathway. LuxA and LuxB encode the two subunits of the bacterial luciferase, while the products of LuxC, LuxD and LuxE synthesise the substrate for the light emitting reaction, tetradecanal. The exact function of LuxG is unknown, and it appears to be non-essential for light emission, but its presence increases light output.
 
<br><br>Bacterial lux operons encodes five enzymes involved in the light-generating pathway. LuxA and LuxB encode the two subunits of the bacterial luciferase, while the products of LuxC, LuxD and LuxE synthesise the substrate for the light emitting reaction, tetradecanal. The exact function of LuxG is unknown, and it appears to be non-essential for light emission, but its presence increases light output.
  
 
===Usage===  
 
===Usage===  
−
<br><br>Team NUS Singapore 2019 has added a new biobrick (BBa_K3198007) into the iGEM repository this year. This biobrick was found to possess bacteriostatic effect as reported by Gerdes et al in 2008 and was therefore used by team NUS Singapore 2019 as part of their sleep-wake module to control the growth of E. coli by inducing dormancy in these cells. it is used to demonstrate that when cells are sleeping, there is little luminescence production and when cells as awake, luminescence production resumes.  
+
Team NUS Singapore 2019 has added a new biobrick (BBa_K3198007) into the iGEM repository this year. This biobrick was found to possess bacteriostatic effect as reported by Gerdes et al in 2008 and was therefore used by team NUS Singapore 2019 as part of their sleep-wake module to control the growth of E. coli by inducing dormancy in these cells. it is used to demonstrate that when cells are sleeping, there is little luminescence production and when cells as awake, luminescence production resumes.  
  
  
  
 
===Biology===
 
===Biology===
−
<br><br>HicA originates from the hicAB locus of Escherichia coli K-12. HicA toxins cleave mRNAs independently of the ribosome. Overexpression leads to cleavage of a number of mRNAs and tmRNA, in a translation-independent fashion, suggesting that HicA is an mRNA interferase, which may play a role in bacterial resistance to antibiotics. In addition, overexpression of HicA leads to cell death and inhibits cell proliferation via inhibition of translation. The effect may be overcome by expression of antitoxin HicB.
+
HicA originates from the hicAB locus of Escherichia coli K-12. HicA toxins cleave mRNAs independently of the ribosome. Overexpression leads to cleavage of a number of mRNAs and tmRNA, in a translation-independent fashion, suggesting that HicA is an mRNA interferase, which may play a role in bacterial resistance to antibiotics. In addition, overexpression of HicA leads to cell death and inhibits cell proliferation via inhibition of translation. The effect may be overcome by expression of antitoxin HicB.
  
 
===References===
 
===References===

Revision as of 10:33, 27 September 2019


HicA-LuxABCDE

This part contains the toxin component of a type II toxin-antitoxin (TA) system. HicA is a probable translation-independent mRNA interferase.

Bacterial lux operons encodes five enzymes involved in the light-generating pathway. LuxA and LuxB encode the two subunits of the bacterial luciferase, while the products of LuxC, LuxD and LuxE synthesise the substrate for the light emitting reaction, tetradecanal. The exact function of LuxG is unknown, and it appears to be non-essential for light emission, but its presence increases light output.


Description

This part contains the toxin component of a type II toxin-antitoxin (TA) system. HicA is a probable translation-independent mRNA interferase.

Bacterial lux operons encodes five enzymes involved in the light-generating pathway. LuxA and LuxB encode the two subunits of the bacterial luciferase, while the products of LuxC, LuxD and LuxE synthesise the substrate for the light emitting reaction, tetradecanal. The exact function of LuxG is unknown, and it appears to be non-essential for light emission, but its presence increases light output.

Usage

Team NUS Singapore 2019 has added a new biobrick (BBa_K3198007) into the iGEM repository this year. This biobrick was found to possess bacteriostatic effect as reported by Gerdes et al in 2008 and was therefore used by team NUS Singapore 2019 as part of their sleep-wake module to control the growth of E. coli by inducing dormancy in these cells. it is used to demonstrate that when cells are sleeping, there is little luminescence production and when cells as awake, luminescence production resumes.


Biology

HicA originates from the hicAB locus of Escherichia coli K-12. HicA toxins cleave mRNAs independently of the ribosome. Overexpression leads to cleavage of a number of mRNAs and tmRNA, in a translation-independent fashion, suggesting that HicA is an mRNA interferase, which may play a role in bacterial resistance to antibiotics. In addition, overexpression of HicA leads to cell death and inhibits cell proliferation via inhibition of translation. The effect may be overcome by expression of antitoxin HicB.

References

Zhang, Y., Zhang, J., Hoeflich, K.P., Ikura, M., Qing, G. and Inouye, M. (2003) MazF cleaves cellular mRNAs specifically at ACA to block protein synthesis in Escherichia coli. Molecular Cell, 12, 913–923.

Jorgensen, M. G., Pandey, D. P., Jaskolska, M., & Gerdes, K. (2008). HicA of Escherichia coli Defines a Novel Family of Translation-Independent mRNA Interferases in Bacteria and Archaea. Journal of Bacteriology, 191(4), 1191–1199. doi: 10.1128/jb.01013-08

Maisonneuve, E., Shakespeare, L. J., Jørgensen, M. G., & Gerdes, K. (2011). Bacterial persistence by RNA endonucleases. Proceedings of the National Academy of Sciences, 108(32), 13206–13211. doi: 10.1073/pnas.1100186108


Source

BBa_K3198000 originated from E. coli K12 and its sequence was synthesized by IDT.

LuxABCDE is from Part:BBa_K325909.

Design Considerations

Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    INCOMPATIBLE WITH RFC[12]
    Illegal NheI site found at 549
    Illegal NheI site found at 1767
    Illegal NheI site found at 4733
  • 21
    INCOMPATIBLE WITH RFC[21]
    Illegal BglII site found at 3731
    Illegal BamHI site found at 489
    Illegal BamHI site found at 1706
    Illegal XhoI site found at 4561
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal AgeI site found at 1541
  • 1000
    INCOMPATIBLE WITH RFC[1000]
    Illegal BsaI site found at 6120
    Illegal BsaI.rc site found at 3129
    Illegal SapI site found at 1523
    Illegal SapI.rc site found at 6445