Difference between revisions of "Part:BBa K3381005:Design"

Revision as of 01:34, 24 October 2020

Mst-CopC-CBM2a

Design Notes

Mst-CopC is known to contain three critical residues for copper binding, one of which is a histidine found at the N-terminus. Therefore, it is important to ensure this residue is preserved within our fusion protein, or binding would likely be significantly impacted. In order to introduce a cut site that would not impede binding, we introduced a modified TEV cut site at the N-terminus such that TEV protease cleaves the amino acid sequence right before the N-terminus histidine of Mst-CopC. Additionally, all cut sites for RFc 10 and NdeI/BamHI (required for cloning into pET 11a) were removed. Then a 5-poly-AT + NdeI prefix and a BamHI + 5-poly-AT suffix was added to facilitate cloning into the pET 11a vector by standard assembly. Lastly, the prefix and suffix for RFc 10 were appended.

Source

Sources of DNA sequences, in order of occurrence in the fusion protein from N' to C':

His-tag and TEV linker sequence: Retrieved from His-tag and TEV linker that occurs in bacterial expression vector pMCSG7: https://plasmid.med.harvard.edu/PlasmidRepository/file/sequence/pMCSG7.gb

Sequence of Mst-CopC (copper-binding domain) retrieved from Genbank (Methylosinus trichosporium O3B): https://www.ncbi.nlm.nih.gov/protein/ATQ66671

Sequence of the CBM linker domain was back-translated from its amino acid sequence, which was retrieved from the following paper describing a natural occurrence of the linker in a protein with a cellulose-binding domain: https://www.jbc.org/content/293/34/13006.full

Sequence of CBM2a (cellulose-binding domain) retrieved from DNA sequence of BBa_K863101 (Cellulose-binding domain of Cellulomonas fimi exoglucanase): https://parts.igem.org/Part:BBa_K863101

References

Courtade, G., Forsberg, Z., Heggset, E. B., Eijsink, V. G., & Aachmann, F. L. (2018, August 24). The carbohydrate-binding module and linker of a modular lytic polysaccharide monooxygenase promote localized cellulose oxidation. Retrieved September 30, 2020, from https://www.jbc.org/content/293/34/13006.full

Koropatkin, N., Randich, A. M., Bhattacharyya-Pakrasi, M., Pakrasi, H. B., & Smith, T. J. (2007, September 14). The Structure of the Iron-binding Protein, FutA1, from Synechocystis 6803. Retrieved September 30, 2020, from https://www.jbc.org/content/282/37/27468.full

Vanommeslaeghe, K. Hatcher, E. Acharya, C. Kundu, S. Zhong, S. Shim, J. E. Darian, E. Guvench, O. Lopes, P. Vorobyov, I. and MacKerell, Jr. A.D. "CHARMM General Force Field (CGenFF): A force field for drug-like molecules compatible with the CHARMM all-atom additive biological force fields," Journal of Computational Chemistry 31: 671-90, 2010, PMC2888302

Zhou, J., Chen, J., Zhuang, N., Zhang, A., Chen, K., Xu, N., . . . Jiang, M. (2020, May 12). Immobilization and Purification of Enzymes With the Novel Affinity Tag ChBD-AB From Chitinolyticbacter meiyuanensis SYBC-H1. Retrieved September 30, 2020, from https://www.frontiersin.org/articles/10.3389/fbioe.2020.00579/full