Part:BBa_K5115078
ribozyme+RBS+nikB+stem-loop
Introduction
This composite part is composed of nikB 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 nikB is a subunit of nikABCDE which encodes a high-affinity nickel transport system in E.coli that is essential for the activation of nickel-dependent enzymes like hydrogenases. The nikB functions to form the membrane channel that transports nickel ions across the inner membrane[4].
Usage and Biology
This part can join in the overall function of NikABCDE.
Get details in BBa_K5115082.
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25COMPATIBLE WITH RFC[25]
- 1000COMPATIBLE WITH RFC[1000]
References
- ↑ 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.
- ↑ 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.
- ↑ 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.
- ↑ Navarro, C., Wu, L. F., & Mandrand-Berthelot, M. A. (1993). The nik operon of Escherichia coli encodes a periplasmic binding-protein-dependent transport system for nickel. Molecular microbiology, 9(6), 1181–1191.
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