Team:UC Davis/Adding secretion/model 1

From 2009.igem.org

(Difference between revisions)
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ice-nucleation protein (INP) from <i>Pseudomonas syringae</i> is used
ice-nucleation protein (INP) from <i>Pseudomonas syringae</i> is used
by its
by its
-
natural host to nucleate ice formation and is implicated in<i> P.
+
natural host to nucleate ice formation and is implicated in<i> P.syringae</i>-associated pathogenesis<i>.&nbsp; </i>INP, as well as a truncated derivative
-
syringae</i>
+
-
associated pathogenesis<i>.&nbsp; </i>INP and a truncated derivative
+
lacking
lacking
-
the central domain (INPNC) have been used extensively for displaying
+
the central domain (INPNC), have been used extensively for displaying
proteins
proteins
on the surface of <i>E. coli (7)</i>.&nbsp; For instance, AldO and
on the surface of <i>E. coli (7)</i>.&nbsp; For instance, AldO and
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INPNC (7,
INPNC (7,
15). <br>
15). <br>
-
<u1:p></u1:p>Park <i>et al.</i> have shown that INPNC when fused to
+
<u1:p></u1:p>Park <i>et al.</i> have shown that INPNC, when fused to
the <i>phaZ1</i>
the <i>phaZ1</i>
gene, including its signal sequence, can serve as a suitable surface
gene, including its signal sequence, can serve as a suitable surface
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codon optimization and subsequently transferred into vector (<span
codon optimization and subsequently transferred into vector (<span
style="background: rgb(255, 255, 51) none repeat scroll 0%; color: black; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;"><span
style="background: rgb(255, 255, 51) none repeat scroll 0%; color: black; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;"><span
-
style="-moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; background-attachment: scroll;">part
+
style="-moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; background-attachment: scroll;"> <i>pSB1AK3</i>).&nbsp;</span></span> As it is expected that this
-
name for AK vector).&nbsp;</span></span> As it is expected that this
+
part will be used in the context of the fusion protein, the prefix and
part will be used in the context of the fusion protein, the prefix and
suffix
suffix
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secrete
secrete
any target protein.&nbsp; <br>
any target protein.&nbsp; <br>
-
<i><u1:p></u1:p>We have modified this protein to be consistent with BBF
+
<i><u1:p></u1:p>We have modified this protein to be consistent with the BBF
RFC-12
RFC-12
Standard. We have submitted this part to the parts registry as part </i><a
Standard. We have submitted this part to the parts registry as part </i><a
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<p class="MsoNormal" style=""><b><span style=""><a name="OmpA"></a>OmpA</span></b><span
<p class="MsoNormal" style=""><b><span style=""><a name="OmpA"></a>OmpA</span></b><span
style="">: OmpA
style="">: OmpA
-
is one of the proteins on the outer membrane of <i>E. coli</i> (13),it
+
is a protein found on the outer membrane of <i>E. coli</i> (13) and
is used
is used
-
as a displaying fusion protein on the cell surface . This part has
+
as a displaying fusion protein on the cell surface. This part has
already been
already been
documented on the parts registry; however, it has not been tested as a
documented on the parts registry; however, it has not been tested as a
-
compnent
+
component
-
of secretion system (via fusion with a target protein linked with a
+
of a secretion system (via fusion with a target protein linked with a
cleavable
cleavable
-
signal sequence) <i><br>
+
signal sequence). <i><br>
-
<u1:p></u1:p>We have modified this protein to be consistent with BBF
+
<u1:p></u1:p>We have modified this protein to be consistent with the BBF
RFC-12 Standard.<br>
RFC-12 Standard.<br>
Note: “It has remained essentially unknown how proteins of E. coli
Note: “It has remained essentially unknown how proteins of E. coli
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<hr align="center" size="2" width="100%"></span></div>
<hr align="center" size="2" width="100%"></span></div>
<p class="MsoNormal" style=""><b><span style=""><a name="LacI"></a>LacI</span></b><span
<p class="MsoNormal" style=""><b><span style=""><a name="LacI"></a>LacI</span></b><span
-
style="">: One
+
style="">: This is an
-
inducible Promoter which was found in the part registry.<br>
+
inducible promoter which was found in the part registry.<br>
<i>For more information go to:<a
<i>For more information go to:<a
href="http://partsregistry.org/wiki/index.php/Part:BBa_R0010">
href="http://partsregistry.org/wiki/index.php/Part:BBa_R0010">
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<hr align="center" size="2" width="100%"></span></div>
<hr align="center" size="2" width="100%"></span></div>
<p class="MsoNormal" style=""><b><span style=""><a name="SS"></a>SS</span></b><span
<p class="MsoNormal" style=""><b><span style=""><a name="SS"></a>SS</span></b><span
-
style="">:The
+
style="">: The
signal sequence (SS) for the <i>phaZ1 </i>gene product of <i>Paucimonas
signal sequence (SS) for the <i>phaZ1 </i>gene product of <i>Paucimonas
lemoignei</i>, a polyhydroxybutyrate depolymerase (15).&nbsp; In the
lemoignei</i>, a polyhydroxybutyrate depolymerase (15).&nbsp; In the
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href="http://partsregistry.org/wiki/index.php/Part:BBa_K103006">BBa_K103006</a>).<span
href="http://partsregistry.org/wiki/index.php/Part:BBa_K103006">BBa_K103006</a>).<span
style="color: rgb(0, 41, 57);"> </span></i>The proposed constructs
style="color: rgb(0, 41, 57);"> </span></i>The proposed constructs
-
would consists of a
+
would consist of a
membrane anchor (INPNC or OmpA) followed by the cleavable signal
membrane anchor (INPNC or OmpA) followed by the cleavable signal
sequence and
sequence and
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<i><u1:p></u1:p>Since we expect that this part will be used in the
<i><u1:p></u1:p>Since we expect that this part will be used in the
context of a
context of a
-
fusion protein, we have modified this protein to be consistent with BBF
+
fusion protein, we have modified this protein to be consistent with the BBF
RFC-12
RFC-12
Standard. We have submitted this part to the part registry as part </i><a
Standard. We have submitted this part to the part registry as part </i><a
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<hr align="center" size="2" width="100%"></span></div>
<hr align="center" size="2" width="100%"></span></div>
<p class="MsoNormal"><b><span style=""><a name="Tag"></a>6-His Tag</span></b><span
<p class="MsoNormal"><b><span style=""><a name="Tag"></a>6-His Tag</span></b><span
-
style="">:The 6-Histidine Tag serves as a tag for
+
style="">: The 6-Histidine Tag serves as a tag for
Western Blotting if our fluorescent reporters are not expressed as
Western Blotting if our fluorescent reporters are not expressed as
highly as we
highly as we
would like. <u2:p></u2:p><br>
would like. <u2:p></u2:p><br>
-
<i>Note: We are using this tag, just in case if the GFP or Luciferase
+
<i>Note: We are using this tag just in case the GFP or Luciferase
-
does not
+
do not
work under a plate reader.</i> <o:p></o:p></span></p>
work under a plate reader.</i> <o:p></o:p></span></p>
<div class="MsoNormal"
<div class="MsoNormal"

Revision as of 18:45, 21 October 2009

Model 1

=

Secretion Model 1:

Click on an individual part for more information.


a.

b.


INPNC: The ice-nucleation protein (INP) from Pseudomonas syringae is used by its natural host to nucleate ice formation and is implicated in P.syringae-associated pathogenesisINP, as well as a truncated derivative lacking the central domain (INPNC), have been used extensively for displaying proteins on the surface of E. coli (7).  For instance, AldO and PhaZ1 have been successfully displayed on the surface of E. coli using INPNC (7, 15).
Park et al. have shown that INPNC, when fused to the phaZ1 gene, including its signal sequence, can serve as a suitable surface delivery and secretion device of the otherwise toxic phaZ1 gene product (15).  This part was synthesized by Mr. Gene (Regensburg, Germany) with codon optimization and subsequently transferred into vector ( pSB1AK3).  As it is expected that this part will be used in the context of the fusion protein, the prefix and suffix for this part are consistent with the BBF RCF-12 standard. 
We have proposed to build and test a general protein secretion system modeled after that developed by Park et al. in which a fusion of INPNC and the signal sequence from the phaZ1 gene are used to secrete any target protein. 
We have modified this protein to be consistent with the BBF RFC-12 Standard. We have submitted this part to the parts registry as part BBa_K265008.


OmpA: OmpA is a protein found on the outer membrane of E. coli (13) and is used as a displaying fusion protein on the cell surface. This part has already been documented on the parts registry; however, it has not been tested as a component of a secretion system (via fusion with a target protein linked with a cleavable signal sequence).
We have modified this protein to be consistent with the BBF RFC-12 Standard.
Note: “It has remained essentially unknown how proteins of E. coli outer membrane are sorted and incorporated into this membrane” (10)

For more information go to: BBa_K103006


RBS:  Ribosome Binding site number 32 (BBa_J61132) from the registry is being used in our secretion system.
For more information go to: BBa_J61132


Terminator: We are using BBa_B0015, a double terminator, as our terminator in both our secretion and pH system.
For more information go to: BBa_B0015


GFP: We are using Green Fluorescent Protein as a reporter that also serves as a small protein in testing our secretion system.
For more informaiton go to: BBa_K265003 


Luciferase: Luciferase is a firefly protein that also fluoresces, so it serves as a reporter as well as a testable large protein.
For more information go to: BBa_1712019


LacI: This is an inducible promoter which was found in the part registry.
For more information go to: BBa_R0010


SS: The signal sequence (SS) for the phaZ1 gene product of Paucimonas lemoignei, a polyhydroxybutyrate depolymerase (15).  In the native protein the signal sequence is cleaved between residues Ala37 and Leu38.  Park et al. have showed that the fusion of the complete phaZ1 gene (including SS) and a truncated ice nucleation protein from Pseudomonas syringae (BBa_K265008), could lead to stable expression and secretion of the phaZ1 gene product. 
We propose that the signal sequence might be generally useful as a cleavage tag in secretion systems that include a membrane anchor component, such as INPNC (BBa_K265008) or OmpA (BBa_K103006). The proposed constructs would consist of a membrane anchor (INPNC or OmpA) followed by the cleavable signal sequence and finally a target protein marked for secretion. 
Since we expect that this part will be used in the context of a fusion protein, we have modified this protein to be consistent with the BBF RFC-12 Standard. We have submitted this part to the part registry as part BBa_K265002.


6-His Tag: The 6-Histidine Tag serves as a tag for Western Blotting if our fluorescent reporters are not expressed as highly as we would like.
Note: We are using this tag just in case the GFP or Luciferase do not work under a plate reader.