Difference between revisions of "Part:BBa K346003"

Revision as of 16:51, 24 October 2010

RBS(B0032)+MBP(mercury metal binding peptide engineered from MerR)

This part is a combination of a rbs, a mbp, coding a mercury metal binding peptide egineered from MerR, and a terminator.

Sequence and Features

Assembly Compatibility:

10
COMPATIBLE WITH RFC[10]
12
COMPATIBLE WITH RFC[12]
21
INCOMPATIBLE WITH RFC[21]
Illegal BamHI site found at 184
23
COMPATIBLE WITH RFC[23]
25
COMPATIBLE WITH RFC[25]
1000
COMPATIBLE WITH RFC[1000]

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 __NOTOC__
 <partinfo>BBa_K346003 short</partinfo>
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 <!-- Add more about the biology of this part here
-===Usage and Biology===
+===Description===
+MerR, the mercury-responsible transcription factor, acts as an effective mercury accumulator in aquatic environment.However, as a transcription regulator, over-expression of MerR in bacteria may lead to some unpredictable side effect. Earlier work suggested that the truncated peptide only consisting of the metal binding domain can form a stable dimer with its mercury binding affinity remained and DNA binding domain and metal binding domain can function individually.Based on all these above and carefully structure analysis of MerR via 3D structure modeling, we directly tandemed two copies of metal binding domain of MerR together, to implement a mercury metal binding peptide (MBP) as is shown in the figure.
+[[Image:mbp.jpg]]
+The figure shows the scheme of MBP construction and the predicted MBP structure. (A) Linear structure of MerR coding region. (B) Construction of MBP. The MBP was constructed by fusing two copies of metal binding domain of MerR in tandem with a flexible SSG bridge. Blue bars indicate the dimerization helix in the metal binding domain of MerR, and gray bars indicate other α-helices of MerR. The red line indicates the SSG linker, and the blue and green lines indicate the loop after the dimerization loop and the region after the loop, respectively. Orange dots indicate cysteines involved in Hg(II) binding. (C) Predicted structure of resulted metal binding peptide. Mercury ions are indicated as black balls in metal binding pockets.
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