Difference between revisions of "Part:BBa K1045003"

Revision as of 17:07, 28 October 2013

Diadenylate cyclase domain of Listeria monocytogenes cdaA (DacA)

The severe threat caused by bacteria which are resistant to conventional antibiotic drugs and the appearance of even multi-resistant strains demonstrates the urgent need for the discovery of new antibacterial substance classes. Cyclic di-AMP was discovered to be an essential signal molecule in Gram-positive bacteria including the pathogenic species Streptococcus pneumoniae, Staphylococcus aureus and Listeria monocytogenes. Both, loss and overproduction of c-di-AMP have detrimental effects on cell growth, cell wall synthesis, and propagation. Thus, the diadenylate cyclase (DAC) which catalyses the condensation reaction of two ATP molecules to c-di-AMP is the key factor for signal molecule production and maintenance of c-di-AMP homeostasis. We are convinced that the DAC is a very promising target for the development of highly specific antibiotic substances which exclusively act on Gram-positive bacteria and are not harmful to Gram-negative ones, including the gut bacterium Escherichia coli as well as humans. Here, we introduce a truncated but functional DAC which localizes to the cytosol and can easily be purified. Furthermore, protein crystals were obtained as well as the protein structure by X-ray diffraction analysis. The part BBa_K1045003 described here, covers the amino acids 100 to 273 of the full length coding sequence of CdaA.
For a precise description of this part, please vistit the experience page!

Fig. 1. c-di-AMP production and degradation. c-di-AMP is produced from two molecules of ATP by DACs and degraded to pApA by phosphodiasterases. (Edited from Corrigan and Gründling, 2013)

http://youtu.be/T0xpaOZtjfk

Sequence and Features

Assembly Compatibility:

10
COMPATIBLE WITH RFC[10]
12
COMPATIBLE WITH RFC[12]
21
COMPATIBLE WITH RFC[21]
23
COMPATIBLE WITH RFC[23]
25
COMPATIBLE WITH RFC[25]
1000
COMPATIBLE WITH RFC[1000]

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 Cyclic di-AMP was discovered to be an essential signal molecule in Gram-positive bacteria including the pathogenic species ''Streptococcus pneumoniae'', ''Staphylococcus aureus'' and ''Listeria monocytogenes''. Both, loss and overproduction of c-di-AMP have detrimental effects on cell growth, cell wall synthesis, and propagation. Thus, the diadenylate cyclase (DAC) which catalyses the condensation reaction of two ATP molecules to c-di-AMP is the key factor for signal molecule production and maintenance of c-di-AMP homeostasis. We are convinced that the DAC is a very promising target for the development of highly specific antibiotic substances which exclusively act on Gram-positive bacteria and are not harmful to Gram-negative ones, including the gut bacterium ''Escherichia coli'' as well as humans. Here, we introduce a truncated but functional DAC which localizes to the cytosol and can easily be purified. Furthermore, protein crystals were obtained as well as the protein structure by X-ray diffraction analysis. The part [[Part:BBa_K1045003|BBa_K1045003]] described here, covers the amino acids 100 to 273 of the full length coding sequence of CdaA. <br /> For a precise description of this part, please vistit the experience page!
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+[[File:image002.png|400px|thumb|left|'''Fig. 1. c-di-AMP production and degradation.''' c-di-AMP is produced from two molecules of ATP by DACs and degraded to pApA by phosphodiasterases. (Edited from Corrigan and Gründling, 2013)]]
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