Difference between revisions of "Part:BBa K4905004"
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== Information == | == Information == | ||
Basic-region Leucine zippers (bZIPs) are alpha-helical domains with a repeating unit “abcdefg”. In this unit, the positions “a” and “d” consist of a hydrophobic residue and the ”e” and “g” positions consist of charged residues. The zippers form an alpha-helix and their charged residues form ion pairs between helices, causing them to associate[1]. | Basic-region Leucine zippers (bZIPs) are alpha-helical domains with a repeating unit “abcdefg”. In this unit, the positions “a” and “d” consist of a hydrophobic residue and the ”e” and “g” positions consist of charged residues. The zippers form an alpha-helix and their charged residues form ion pairs between helices, causing them to associate[1]. | ||
Revision as of 09:00, 9 August 2023
Z1 leucine zipper
Information
Basic-region Leucine zippers (bZIPs) are alpha-helical domains with a repeating unit “abcdefg”. In this unit, the positions “a” and “d” consist of a hydrophobic residue and the ”e” and “g” positions consist of charged residues. The zippers form an alpha-helix and their charged residues form ion pairs between helices, causing them to associate[1].
Individual bZIP proteins can form homodimers or heterodimers with other bZIP proteins with a slightly different sequence[1]. Not all bZIP proteins can dimerize with each other, some will only homodimerize with the same bZIP protein. Others will only heterodimerize with specific other bZIP proteins[2].
In cells, the main function of bZIPs is that they work as transcription factor, where the homodimer or heterodimer will form at the promotor regions of target genes[3]. This makes leucine zippers a large family of transcription factors, where each member has a preference for a specific DNA sequence[2].
The TU-Eindhoven 2023 team used this part in a composite part for the formation of a hydrogel in e.coli. Two different bZIP proteins are made, which will form a heterodimer. This part is one of these bZIP proteins.
Characterization
We ran an electrophoresis gel with the plasmid, digested with enzymes AcuI and BglI. The bands of Z1.1 and Z1.2 is shown in slot 2 and 4 in the gel. A 1 kb ladder (L) was used. The remaining slots were used for different parts. The bands formed as expected.
- A120: BseRI + BglI, with CIP
- Z1.1: Acul + BglI, without CIP
- A100: BseRI + BglI, with CIP
- Z1.2: Acul + BglI, without CIP
- Z2: Acul + BglI, without CIP
References
[1] Alber, T. (1992). Structure of the leucine zipper. Current Opinion in Genetics and Development, 2, 205–210.
[2] Hakoshima, T. (n.d.). Leucine Zippers. https://doi.org/10.1038/npg.els.0005049
[3] Seldeen, K. L., McDonald, C. B., Deegan, B. J., Bhat, V., & Farooq, A. (2010). Dissecting the Role of Leucine Zippers in the Binding of bZIP Domains of Jun Transcription Factor to DNA. Biochemical and Biophysical Research Communications, 394(4), 1030. https://doi.org/10.1016/J.BBRC.2010.03.116