Difference between revisions of "Part:BBa K5115062"

 
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===Introduction===
 
===Introduction===
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This composite part is composed of hoxU-GS-EP coding sequence (CDS), wrapped by ribozyme-assisted polycistronic co-expression system (pRAP) sequences. By inserting [https://parts.igem.org/Part:BBa_K4765020 BBa_K4765020] before CDS, the RNA of Twister ribozyme conduct self-cleaving in the mRNA.<ref>Eiler, D., Wang, J., & Steitz, T. A. (2014). Structural basis for the fast self-cleavage reaction catalyzed by the twister ribozyme. Proceedings of the National Academy of Sciences, 111(36), 13028–13033.</ref> To protect the mono-cistron mRNA from degradation, a stem-loop structure is placed at the 3' end of CDS.<ref>Liu, Y., Wu, Z., Wu, D., Gao, N., & Lin, J. (2022). Reconstitution of Multi-Protein Complexes through Ribozyme-Assisted Polycistronic Co-Expression. ACS Synthetic Biology, 12(1), 136–143.</ref> In 2023, we extensively tested various [https://2023.igem.wiki/fudan/part-collection/#ribozyme-assisted-polycistronic-co-expression stem-loops] using [https://parts.igem.org/Part:BBa_K4765129 BBa_K4765129]. For parts we made this year, this strong protective stem-loop sequence was used.
  
===Usage and Biology===
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As for the ribosome binding sequence (RBS) after the ribozyme and before the CDS, we used [https://parts.igem.org/Part:BBa_K4162006 T7 RBS], from bacteriophage T7 gene 10.<ref>The T7 phage gene 10 leader RNA, a ribosome-binding site that dramatically enhances the expression of foreign genes in Escherichia coli. Olins PO,  Devine CS,  Rangwala SH,  Kavka KS. Gene, 1988 Dec 15;73(1):227-35.</ref> It is an intermediate strength RBS according to [https://2022.igem.wiki/fudan/measurement#optimization our 2022 results], which allows us to change it to a weaker [https://parts.igem.org/Part:BBa_J61100 J6 RBS] or a stronger [https://parts.igem.org/Part:BBa_B0030 B0 RBS] if needed, enabling flexible protein expression levels between various ribozyme connected parts.
  
===Characterization===
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The CDS sequence include hoxU, EP and a linker of GS. The hoxU is a hydrogenase subunit responsible for electron transport, conducting electrons between hoxH and hoxF<ref> Löscher, S., Burgdorf, T., Zebger, I., Hildebrandt, P., Dau, H., Friedrich, B., & Haumann, M. (2006). Bias from H2 Cleavage to Production and Coordination Changes at the Ni−Fe Active Site in the NAD+-Reducing Hydrogenase from Ralstonia eutropha. Biochemistry, 45(38), 11658–11665.</ref>. The EP sequence encodes an endogenous encapsulation peptide, which plays a crucial role in directing external proteins into bacterial microcompartments like carboxysomes<ref> Li, T., Jiang, Q., Huang, J., Aitchison, C. M., Huang, F., Yang, M., Dykes, G. F., He, H. L., Wang, Q., Sprick, R. S., Cooper, A. I., & Liu, L. N. (2020). Reprogramming bacterial protein organelles as a nanoreactor for hydrogen production. Nature communications, 11(1), 5448.</ref>. Linking EP with hoxU, we hope that EP can import the hydrogenase into the carboxysome, creating a stable environment for the enzyme to work.
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===Usage and Biology===
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This part can import the hydrogenase into the carboxysome, creating a stable environment for the enzyme to work.
  
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Get details in [https://parts.igem.org/Part:BBa_K5115066 BBa_K5115066].
  
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===Sequence ang Features===
 
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<span class='h3bb'>Sequence and Features</span>
 
<span class='h3bb'>Sequence and Features</span>

Latest revision as of 12:52, 2 October 2024


ribozyme+RBS+hoxU-GS-EP+stem-loop

contributed by Fudan iGEM 2023

Introduction

This composite part is composed of hoxU-GS-EP coding sequence (CDS), wrapped by ribozyme-assisted polycistronic co-expression system (pRAP) sequences. By inserting BBa_K4765020 before CDS, the RNA of Twister ribozyme conduct self-cleaving in the mRNA.[1] To protect the mono-cistron mRNA from degradation, a stem-loop structure is placed at the 3' end of CDS.[2] In 2023, we extensively tested various stem-loops using BBa_K4765129. For parts we made this year, this strong protective stem-loop sequence was used.

As for the ribosome binding sequence (RBS) after the ribozyme and before the CDS, we used T7 RBS, from bacteriophage T7 gene 10.[3] It is an intermediate strength RBS according to our 2022 results, which allows us to change it to a weaker J6 RBS or a stronger B0 RBS if needed, enabling flexible protein expression levels between various ribozyme connected parts.

The CDS sequence include hoxU, EP and a linker of GS. The hoxU is a hydrogenase subunit responsible for electron transport, conducting electrons between hoxH and hoxF[4]. The EP sequence encodes an endogenous encapsulation peptide, which plays a crucial role in directing external proteins into bacterial microcompartments like carboxysomes[5]. Linking EP with hoxU, we hope that EP can import the hydrogenase into the carboxysome, creating a stable environment for the enzyme to work.

Usage and Biology

This part can import the hydrogenase into the carboxysome, creating a stable environment for the enzyme to work.

Get details in BBa_K5115066.

Sequence ang Features

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 485
    Illegal BglII site found at 563
    Illegal XhoI site found at 493
    Illegal XhoI site found at 685
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal AgeI site found at 446
    Illegal AgeI site found at 1445
  • 1000
    INCOMPATIBLE WITH RFC[1000]
    Illegal BsaI site found at 267
    Illegal BsaI site found at 429
    Illegal SapI.rc site found at 378


References

  1. Eiler, D., Wang, J., & Steitz, T. A. (2014). Structural basis for the fast self-cleavage reaction catalyzed by the twister ribozyme. Proceedings of the National Academy of Sciences, 111(36), 13028–13033.
  2. Liu, Y., Wu, Z., Wu, D., Gao, N., & Lin, J. (2022). Reconstitution of Multi-Protein Complexes through Ribozyme-Assisted Polycistronic Co-Expression. ACS Synthetic Biology, 12(1), 136–143.
  3. The T7 phage gene 10 leader RNA, a ribosome-binding site that dramatically enhances the expression of foreign genes in Escherichia coli. Olins PO, Devine CS, Rangwala SH, Kavka KS. Gene, 1988 Dec 15;73(1):227-35.
  4. Löscher, S., Burgdorf, T., Zebger, I., Hildebrandt, P., Dau, H., Friedrich, B., & Haumann, M. (2006). Bias from H2 Cleavage to Production and Coordination Changes at the Ni−Fe Active Site in the NAD+-Reducing Hydrogenase from Ralstonia eutropha. Biochemistry, 45(38), 11658–11665.
  5. Li, T., Jiang, Q., Huang, J., Aitchison, C. M., Huang, F., Yang, M., Dykes, G. F., He, H. L., Wang, Q., Sprick, R. S., Cooper, A. I., & Liu, L. N. (2020). Reprogramming bacterial protein organelles as a nanoreactor for hydrogen production. Nature communications, 11(1), 5448.