Difference between revisions of "Part:BBa K861171"

Revision as of 06:29, 16 September 2012

Pcar, synthetic promoter repressed by CRP

This is a promoter designed for the Eschaerichia coli . It includes the CRP-binding site and the RNA polymerase-binding site which have a overlap of several base pairs. Due to the steric hindrance between CRP and RNA polymerase, gene downstream of the promoter will be repressed.In the cells ,low glucose concentration will result in increased activity by adenylate cyclase, rising up the concentration of cAMP in cell. cAMP binds to the CRP, which, in its bound form, is able to bind tightly to the specific DNA site in the promoter and repress the gene downstream. On the contrary, high glucose concentration will result in the expression of downstream genes. Compared to PI (BBa_K861170), the binding of CRP and the promoter is stronger and the promoter is weaker due to the sequence change of in -10 region of the promoter.

Sequence and Features

Assembly Compatibility:

10
COMPATIBLE WITH RFC[10]
12
INCOMPATIBLE WITH RFC[12]
Illegal NheI site found at 7
21
COMPATIBLE WITH RFC[21]
23
COMPATIBLE WITH RFC[23]
25
COMPATIBLE WITH RFC[25]
1000
COMPATIBLE WITH RFC[1000]

@@ Line 2: / Line 2: @@
 <partinfo>BBa_K861171 short</partinfo>
-This is a promoter designed for the Eschaerichia coli . It includes the CRP-binding site and the RNA polymerase-binding site which have a overlap of several base pairs.So because of the steric hindrance between CRP and RNA polymerase,gene downstream of the promoter will be repressed at high concentration of CRP.In the cells ,low glucose concentration results in increased activity by adenylate cyclase. cAMP binds to the cAMP receptor protein, which, in its bound form, is able to bind tightly to the specific DNA site in the promoter and repress the gene downstream.On the contrary,high glucose concentration will result in the expression of the promoter. Compared to PI (BBa_K861170), the binding of CRP and the promoter is stronger and the promoter is weaker due to the change of sequences in -10 region.
+This is a promoter designed for the Eschaerichia coli . It includes the CRP-binding site and the RNA polymerase-binding site which have a overlap of several base pairs. Due to the steric hindrance between CRP and RNA polymerase, gene downstream of the promoter will be repressed.In the cells ,low glucose concentration  will result in increased activity by adenylate cyclase, rising up the concentration of cAMP in cell. cAMP binds to the CRP, which, in its bound form, is able to bind tightly to the specific DNA site in the promoter and repress the gene downstream. On the contrary, high glucose concentration will result in the expression of downstream genes. Compared to PI (BBa_K861170), the binding of CRP and the promoter is stronger and the promoter is weaker due to the sequence change of in -10 region of the promoter.
 <!-- Add more about the biology of this part here