Difference between revisions of "Part:BBa K2328034"

 
 
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<partinfo>BBa_K2328034 parameters</partinfo>
 
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===Usage===
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smURFP (small ultra-red FP) is an important part in our group. It is desirable for our in-vivo imaging because with it molecule less light is scattered, absorbed, or re-emitted by endogenous biomolecules compared with cyan, green, yellow and orange FPs. smURFP can covalently attaches a biliverdin(BV) chromophore without a lyase, and has 642/670 nm excitation - emission peaks, a large extinction coefficient and quantum yield, and photostability comparable to that of eGFP. Besides, smURFP II is a codon-optimized version for intestinal bacteria. SP.b is a signal peptide. BrkA is the anchor of an autotransporter that diated bacterial surface display system. The unique characteristic of BrkA is that the cleaved passenger domain remains adhered on the bacterial surface, which is conducive to keep the displayed exogenous proteins associated onto the cell, thus, the functionalized bacteria can be recycled/re-used conveniently. Now we hope to display our  smURFP II on the surface of intestinal bacteria by using it.
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===Biology===
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In order to fluoresce, smURFP must be combined with biliverdin (BV) .We have two solutions to make in-vivo imaging come true. The first one is co-expression system and the other one is surface display system. To construct the co-expression system, the gene of fluorescent protein---smURFP and the gene of the precursor of biliverdin---HO-1 should be connected to the same expression vector and then transferred to our target bacteria. The precursor of biliverdin will be transferred to biliverdin through a series of conversion, and then fluorescent protein will combine with biliverdin directly in our target bacteria and glow in the bacteria. To construct the surface display system, the gene of fluorescent protein---smURFP and the gene of the anchoring protein should be connected to the same expression vector. After the recombinant plasmid is transferred to the target bacteria, the fluorescent protein and anchoring protein will express at the same time and become fusion protein, and then the fluorescent protein will be carried to the cell surface by anchoring protein. With the added biliverdin, fluorescent protein will combine with biliverdin and glow on the cell surface.
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Autotransporter BrkA (Bordetella serum-resistance killing protein A )is from Bordetella pertussis.
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===Reference===
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[1] Rodriguez EA,Tran GN , Gross LA, et al. A far-red fluorescent protein evolved from a cyanobacterial phycobiliprotein .[J].NATURE METHODS,2016:763-769.
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[2] [[Part:BBa_K1921011]].

Latest revision as of 15:15, 26 October 2017


SP.b + Histag.b + smURFP II + BrkA

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
    INCOMPATIBLE WITH RFC[25]
    Illegal NgoMIV site found at 930
    Illegal NgoMIV site found at 1359
    Illegal NgoMIV site found at 1995
    Illegal AgeI site found at 488
  • 1000
    INCOMPATIBLE WITH RFC[1000]
    Illegal BsaI.rc site found at 1963


Usage

smURFP (small ultra-red FP) is an important part in our group. It is desirable for our in-vivo imaging because with it molecule less light is scattered, absorbed, or re-emitted by endogenous biomolecules compared with cyan, green, yellow and orange FPs. smURFP can covalently attaches a biliverdin(BV) chromophore without a lyase, and has 642/670 nm excitation - emission peaks, a large extinction coefficient and quantum yield, and photostability comparable to that of eGFP. Besides, smURFP II is a codon-optimized version for intestinal bacteria. SP.b is a signal peptide. BrkA is the anchor of an autotransporter that diated bacterial surface display system. The unique characteristic of BrkA is that the cleaved passenger domain remains adhered on the bacterial surface, which is conducive to keep the displayed exogenous proteins associated onto the cell, thus, the functionalized bacteria can be recycled/re-used conveniently. Now we hope to display our smURFP II on the surface of intestinal bacteria by using it.

Biology

In order to fluoresce, smURFP must be combined with biliverdin (BV) .We have two solutions to make in-vivo imaging come true. The first one is co-expression system and the other one is surface display system. To construct the co-expression system, the gene of fluorescent protein---smURFP and the gene of the precursor of biliverdin---HO-1 should be connected to the same expression vector and then transferred to our target bacteria. The precursor of biliverdin will be transferred to biliverdin through a series of conversion, and then fluorescent protein will combine with biliverdin directly in our target bacteria and glow in the bacteria. To construct the surface display system, the gene of fluorescent protein---smURFP and the gene of the anchoring protein should be connected to the same expression vector. After the recombinant plasmid is transferred to the target bacteria, the fluorescent protein and anchoring protein will express at the same time and become fusion protein, and then the fluorescent protein will be carried to the cell surface by anchoring protein. With the added biliverdin, fluorescent protein will combine with biliverdin and glow on the cell surface. Autotransporter BrkA (Bordetella serum-resistance killing protein A )is from Bordetella pertussis.

Reference

[1] Rodriguez EA,Tran GN , Gross LA, et al. A far-red fluorescent protein evolved from a cyanobacterial phycobiliprotein .[J].NATURE METHODS,2016:763-769.

[2] Part:BBa_K1921011.