Coding

Part:BBa_K3924003

Designed by: Jianfan Yang   Group: iGEM21_Tsinghua   (2021-09-30)


Chromofugin


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
    COMPATIBLE WITH RFC[25]
  • 1000
    COMPATIBLE WITH RFC[1000]

Profile

Name: Chromofungin
Base Pairs: 63bp
Origin: Synthetic
Properties: Synthetic short peptide with therapeutic effect on IBD.

Usage and Biology

In order to heal the intestinal tract damage, one of notable symptoms of IBD, we adopted a special therapy expressing the therapeutic proteins controllably by E.coli Nissle 1917 (EcN) in situ. The design is based on a ternary system: sensor - secretion peptide - therapeutic proteins.

Fig.1 General design of the treatment ternary system

Chromofungin（CHR） is one of the candidate therapeutic proteins we screened out to treat IBD, which is the effector element in the ternary system.CHR was able to suppress pro-inflammatory macrophage function through the inhibition of toll-like receptor (TLR) 4/NF-κB signaling. Particularly, the blocking of TLR 4/NF-κB pathway induced the reduction of several cytokine expression such as IL-6, IL-1β, TNFα, MCP1, and MIP1.

Design and Construction

According to literature research we chose 10 candidate proteins for IBD treatment.
Table 1. List of candidate therapeutic proteins

Part Name Element Name Reference
BBa_K3924000
BBa_K3924001
BBa_K3924002		 TFF1/2/3 [1][2]
BBa_K3924003 Chromofungin(CHR) [3]
BBa_K3924004 IL10 [4]
BBa_K3924005 Defensin-5(HD5) [5]
BBa_K3924006 GLP2 [6]
BBa_K3924007 Fgl2 [7]
BBa_K3924008 SOCS1-KIR [3]
BBa_K3924009 tkip [3]
BBa_K3924037 G-CSF [8][9]
BBa_K3924038 GM-CSF [8][10]
BBa_K3924039 Beta-defensin 4A(hBD2) [11]

The sequence of CHR is acquired from the lecture.

Functional Verification

Fig 2. The scheme of the proof-of-concept for therapeutic proteins.

All of these proteins are worth studying, but we only chose a few proteins as a proof of concept in our actual wet lab experiments because of the time limit and the high expense of gene synthesis.
For all candidate therapeutic proteins we did codon analysis with our own software tool.(Fig 3)

Fig 3. Codon preference confident analysis of all candidate therapeutic proteins(Compared with GenSmart).

As for CHR, the result of codon preference is shown in Fig 4.

Fig 4. Codon preference confident analysis of CHR.

Reference

[1] Aamann, L., Vestergaard, E. M., & Grønbæk, H. (2014). Trefoil factors in inflammatory bowel disease. World journal of gastroenterology, 20(12), 3223–3230.
[2] Praveschotinunt, P., Duraj-Thatte, A.M., Gelfat, I. et al. Engineered E. coli Nissle 1917 for the delivery of matrix-tethered therapeutic domains to the gut. Nat Commun 10, 5580 (2019).
[3] La Manna, S., Di Natale, C., Florio, D., & Marasco, D. (2018). Peptides as Therapeutic Agents for Inflammatory-Related Diseases. International journal of molecular sciences, 19(9), 2714.
[4] Li, M. C., & He, S. H. (2004). IL-10 and its related cytokines for treatment of inflammatory bowel disease. World journal of gastroenterology, 10(5), 620–625.
[5] Shukla, P.K., Meena, A.S., Rao, V. et al. Human Defensin-5 Blocks Ethanol and Colitis-Induced Dysbiosis, Tight Junction Disruption and Inflammation in Mouse Intestine. Sci Rep 8, 16241 (2018).
[6] Duan, L., Rao, X., Braunstein, Z., Toomey, A. C., & Zhong, J. (2017). Role of Incretin Axis in Inflammatory Bowel Disease. Frontiers in immunology, 8, 1734.
[7] Zhu, Y. , Jie, Z. , Yi, F. , Chen, L. , Zhang, L. , & Fei, Y. , et al. (2018). Control of intestinal inflammation, colitis-associated tumorigenesis, and macrophage polarization by fibrinogen-like protein 2. Frontiers in Immunology, 9, 87-.
[8] Guidi, L., Mocci, G., Marzo, M., & Rutella, S. (2008). Treatment of Crohn's disease with colony-stimulating factors: An overview. Therapeutics and clinical risk management, 4(5), 927–934.
[9] Vanz, A. L. , Renard, G. , Palma, M. S. , Chies, J. M. , Dalmora, S. L. , & Basso, L. A. , et al. (2008). Human granulocyte colony stimulating factor (hg-csf): cloning, overexpression, purification and characterization. Microbial Cell Factories, 7(1), 1-12.
[10] Malekian, R., Jahanian-Najafabadi, A., Moazen, F., Ghavimi, R., Mohammadi, E., & Akbari, V. (2019). High-yield Production of Granulocyte-macrophage Colony-stimulating Factor in E. coli BL21 (DE3) By an Auto-induction Strategy. Iranian journal of pharmaceutical research : IJPR, 18(1), 469–478.
[11] Koeninger, L. , Armbruster, N. S. , Brinch, K. S. , Kjaerulf, S. , & Wehkamp, J. . (2020). Human β-defensin 2 mediated immune modulation as treatment for experimental colitis. Frontiers in Immunology, 11, 93.


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