Difference between revisions of "Part:BBa K320001"

Latest revision as of 15:49, 27 October 2010

Immunotoxin against P.Berghei

This BioBrick codes for an Immunotoxin. It is composed of two main parts. The first is a single-chain antibody fragment (scFv) directed to Pbs2l, a surface membrane protein of Plasmodium berghei ookinetes (sexual reproductive stage of a close relative of the Malaria parasite). This fragment is linked to the second part, a lytic peptide, Shiva-1. Shiva-1 is a synthetic peptide, which amino acids sequence of similar length (38 amino acids) and amino acid properties as Cecropin B, an antibacterial peptide. The purpose of the Immunotoxin is to specifically target and lyse the parasite.

Previous experiments showed that feeding mosquitoes with recombinant E. coli expressing this Immunotoxin induced a significantly lower oocyst density. [http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T29-42JHDJD-9&_user=10&_coverDate=03%2F31%2F2001&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=5f4b78b08a1846e241faaed33bc76cb3&searchtype=a reference]

However E. coli is not a natural symbiont of the mosquito. We would like to improve this experiment by making Asaia express the immunotoxin in the mosquitoes intestinal tract, and run experiments to see if it significantly reduces the number of oocysts.

The BioBricks contains a segments to export the immunotoxin protein to the periplasm.

Sequence and Features

Assembly Compatibility:

10
COMPATIBLE WITH RFC[10]
12
COMPATIBLE WITH RFC[12]
21
INCOMPATIBLE WITH RFC[21]
Illegal BglII site found at 116
23
COMPATIBLE WITH RFC[23]
25
INCOMPATIBLE WITH RFC[25]
Illegal NgoMIV site found at 28
Illegal NgoMIV site found at 54
Illegal NgoMIV site found at 957
1000
INCOMPATIBLE WITH RFC[1000]
Illegal BsaI site found at 472
Illegal BsaI site found at 699

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 <partinfo>BBa_K320001 short</partinfo>
-This Biobrick is an immunotoxin. It is composed of two main parts. The first is a single-chain antibody fragment (scFv) directed to Pbs2l, a surface membrane protein of P. berghei ookinetes. This fragment is linked to the second part, a lytic peptide, Shiva-1. Shiva-1 is a synthetic peptide which amino acids sequence is similar in terms of length (38 amino acids) and amino acid properties to Cecropin B, an antibacterial peptide. The purpose of the immunotoxin is to specifically target and lyse the parasite.
+This BioBrick codes for an Immunotoxin. It is composed of two main parts. The first is a single-chain antibody fragment (scFv) directed to Pbs2l, a surface membrane protein of Plasmodium berghei ookinetes (sexual reproductive stage of a close relative of the Malaria parasite). This fragment is linked to the second part, a lytic peptide, Shiva-1. Shiva-1 is a synthetic peptide, which amino acids sequence of similar length (38 amino acids) and amino acid properties as Cecropin B, an antibacterial peptide. The purpose of the Immunotoxin is to specifically target and lyse the parasite.
-Previous experiments showed that feeding mosquitoes with recombinant E.Coli expressing this immunotoxin induced a significantly lower oocyst density. [http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T29-42JHDJD-9&_user=10&_coverDate=03%2F31%2F2001&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=5f4b78b08a1846e241faaed33bc76cb3&searchtype=a {1}]
+Previous experiments showed that feeding mosquitoes with recombinant ''E. coli'' expressing this Immunotoxin induced a significantly lower oocyst density. [http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T29-42JHDJD-9&_user=10&_coverDate=03%2F31%2F2001&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=5f4b78b08a1846e241faaed33bc76cb3&searchtype=a reference]
-However E. Coli is not a natural symbiote of the mosquito. We would like to improve this experiment by making Asaia express the immunotoxin in the mosquitos intestinal tract, and run experiments to see if it significantly reduces the number of oocysts.
+However ''E. coli'' is not a natural symbiont of the mosquito. We would like to improve this experiment by making Asaia express the immunotoxin in the mosquitoes intestinal tract, and run experiments to see if it significantly reduces the number of oocysts.
-The sequence of the immunotoxin was taken from our reference paper [1], and the codons were optimized for E.Coli before ordering the sequence.
+The BioBricks contains a segments to export the immunotoxin protein to the periplasm.
 <!-- Add more about the biology of this part here