Regulatory

Part:BBa_K2440005

Designed by: Qijie Xu   Group: iGEM17_NUDT_CHINA   (2017-10-22)
Revision as of 02:22, 22 October 2019 by Qiuxinyuan12 (Talk | contribs) (→‎Methods)


SV40 promoter

This is a promoter gene derived from SV40. It could initiate the transcription of downstream gene.

Usage and Biology

The promoter is a DNA region that initiates the transcription of a particular gene. The promoter is located upstream of the same strand at the transcription initiation site of a particular gene. 1

At pmirGLO Vector, SV40 early enhancer/promotor is located at 426–844 nucleotides, with a length of 419 nucleotides. Its role is to initiates the transcription of the hRluc-neo fusion protein coding region.

Sequence and Features

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]


Contribution:NUDT_CHINA, 2019

Summary: Since SV40 promoter has never been characterized in HepG2 cells, This year we added quantitative characterization data of the SV40 promoter.


Accurate characterization of promoter behavior is essential for the rational design of functional synthetic transcription networks such as logic gates and oscillators[1]. To characterize the SV40 promoter, renilla luciferase was used as the reporter gene to quantify the transcriptional strength.

Methods

promoter-carrying plasmid was transfected into liver carcinoma cell line HepG2. 0, 6, 12 and 24h after transfection, cells were harvested, and renilla luciferase activity was measured by Beyotime™ Dual Luciferase Reporter Gene Assay Kit.

To characterize the SV40 promoter, renilla luciferase was used as the reporter gene to quantify the transcriptional strength of promoter. To be specific, plasmids carrying sv40 promoter-renilla luciferase cassette was transfected into liver carcinoma cell line HepG2 by lipo3000 under standard proytocol. Cells were cultures under standard DMEM High glucose medium under 5% CO2 and 37 ℃ with 10% FBS. Cells were harvested 0, 6, 12 and 24h after transfection, and firefly luciferase activity was measured by Beyotime™ Dual Luciferase Reporter Gene Assay Kit.

Results

Results showed significant increase of luciferase level within the first 24 hours of expression.

261px-T--NUDT_CHINA--2019_Rluc.png

Figure 1. Renilla luciferase activity of SV40-rLuc tranfected HepG2 cells. Error bar represents SD of at least 3 biological replicates.

Reference

[1] Gagniuc P, Ionescu-Tirgoviste C. (Apr 2013)."Gene promoters show chromosome-specificity and reveal chromosome territories in humans" BMC Genomics. 14:278. PMID: 23617842 PMCID: PMC3668249 DOI: 10.1186/1471-2164-14-278

[edit]
Categories
Parameters
None