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Title: Novel cis-regulatory elements as synthetic promoters to drive recombinant protein expression from the Chlamydomonas reinhardtii nuclear genome

Journal Article · · New Biotechnology

Eukaryotic green microalgae represent a sustainable, photosynthetic biotechnology platform for generating high-value products. The model green alga Chlamydomonas reinhardtii has already been used to generate high value bioproducts such as recombinant proteins and terpenoids. However, low, unstable, and variable nuclear transgene expression has limited the ease and speed of metabolic engineering and recombinant protein expression in this system. Here, novel genetic devices for transgene expression in C. reinhardtii have been developed by identifying cis-regulatory DNA elements capable of driving high transgene expression in C. reinhardtii promoters using de novo motif discovery informatics approaches. Thirteen putative motifs were synthesized as concatemers, linked to a common minimal basal promoter, and assayed for their activity to drive expression of a yellow fluorescent protein reporter gene. Following transformation of the vectors into C. reinhardtii by electroporation, in vivo measurements of yellow fluorescent protein expression by flow cytometry revealed that five of the DNA motifs analyzed displayed significantly higher reporter expression compared to the basal promoter control. Two of the concatemerized motifs, despite being much smaller minimal cis-regulatory elements, drove reporter expression at levels approaching that of the conventionally-used AR1 promoter. This analysis provides insight into C. reinhardtii promoter structure and gene regulation, and provides a new toolbox of cis-regulatory elements that can be used to drive transgene expression at a variety of expression levels.

Research Organization:
Univ. of California, San Diego, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Bioenergy Technologies Office; Engineering and Physical Sciences Research Council (EPSRC); Biotechnology and Biological Sciences Research Council (BBSRC)
Grant/Contract Number:
EE0008246; EP/N509735/1; EP/S020705/1; PHYCSF-03
OSTI ID:
1853821
Journal Information:
New Biotechnology, Vol. 68; ISSN 1871-6784
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (61)

Gaussia-luciferase as a sensitive reporter gene for monitoring promoter activity in the nucleus of the green alga Chlamydomonas reinhardtii journal May 2008
DREME: motif discovery in transcription factor ChIP-seq data journal May 2011
Introns mediate post-transcriptional enhancement of nuclear gene expression in the green microalga Chlamydomonas reinhardtii journal July 2020
Motif Enrichment Analysis: a unified framework and an evaluation on ChIP data journal April 2010
Integration of Bioinformatics and Synthetic Promoters Leads to the Discovery of Novel Elicitor-Responsive cis-Regulatory Sequences in Arabidopsis journal June 2012
Intron-containing algal transgenes mediate efficient recombinant gene expression in the green microalga Chlamydomonas reinhardtii journal June 2018
Deciphering eukaryotic gene-regulatory logic with 100 million random promoters journal December 2019
High-throughput fluorescence-activated cell sorting for lipid hyperaccumulating Chlamydomonas reinhardtii mutants journal April 2014
Synthetic promoters capable of driving robust nuclear gene expression in the green alga Chlamydomonas reinhardtii journal April 2016
Seven myths of how transcription factors read the cis-regulatory code journal October 2020
Efficiency of different heterologous promoters in the unicellular microalga Chlamydomonas reinhardtii journal March 2013
Systems Analysis of the Response of Photosynthesis, Metabolism, and Growth to an Increase in Irradiance in the Photosynthetic Model Organism Chlamydomonas reinhardtii journal June 2014
Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii journal January 2018
The HSP70A promoter as a tool for the improved expression of transgenes in Chlamydomonas journal January 2000
Control of Multigene Expression Stoichiometry in Mammalian Cells Using Synthetic Promoters journal May 2021
Chemical regulation of Fea1 driven transgene expression in Chlamydomonas reinhardtii journal September 2017
Evolution of sex and mating loci: An expanded view from Volvocine algae journal December 2011
An Engineered Constitutive Promoter Set with Broad Activity Range for Cupriavidus necator H16 journal June 2018
Synthetic promoters genetic control through cis engineering journal March 2007
RSAT matrix-clustering: dynamic exploration and redundancy reduction of transcription factor binding motif collections journal June 2017
Inferring direct DNA binding from ChIP-seq journal May 2012
The MEME Suite journal May 2015
Identifying regulatory networks by combinatorial analysis of promoter elements journal September 2001
Inferring gene regulatory logic from high-throughput measurements of thousands of systematically designed promoters journal May 2012
Establishing Chlamydomonas reinhardtii as an industrial biotechnology host journal March 2015
Efficient foreign gene expression in Chlamydomonas reinhardtii mediated by an endogenous intron journal May 1998
Phototrophic production of heterologous diterpenoids and a hydroxy-functionalized derivative from Chlamydomonas reinhardtii journal September 2018
POWRS: Position-Sensitive Motif Discovery journal July 2012
A synthetic gene coding for the green fluorescent protein (GFP) is a versatile reporter in Chlamydomonas reinhardtii+ journal August 1999
Algal photoreceptors: in vivo functions and potential applications journal October 2013
Algae-Produced Pfs25 Elicits Antibodies That Inhibit Malaria Transmission journal May 2012
The Chlamydomonas genome project: a decade on journal October 2014
Marine Prasinoviruses and Their Tiny Plankton Hosts: A Review journal March 2017
CaMV35S promoter – A plant biology and biotechnology workhorse in the era of synthetic biology journal December 2020
Proteomic Analysis of Isolated Chlamydomonas Centrioles Reveals Orthologs of Ciliary-Disease Genes journal June 2005
How does DNA sequence motif discovery work? journal August 2006
The Chlamydomonas Genome Reveals the Evolution of Key Animal and Plant Functions journal October 2007
BioMart – biological queries made easy journal January 2009
Protein kinases and phosphatases involved in the acclimation of the photosynthetic apparatus to a changing light environment
  • Rochaix, Jean-David; Lemeille, Sylvain; Shapiguzov, Alexey
  • Philosophical Transactions of the Royal Society B: Biological Sciences, Vol. 367, Issue 1608 https://doi.org/10.1098/rstb.2012.0064
journal December 2012
High-value products from microalgae—their development and commercialisation journal January 2013
Factors effecting expression of vaccines in microalgae journal June 2009
The flanking regions of PsaD drive efficient gene expression in the nucleus of the green alga Chlamydomonas reinhardtii journal April 2001
A Series of Fortunate Events: Introducing Chlamydomonas as a Reference Organism journal June 2019
Photosynthetic biomanufacturing in green algae; production of recombinant proteins for industrial, nutritional, and medical uses journal March 2014
Efficient phototrophic production of a high-value sesquiterpenoid from the eukaryotic microalga Chlamydomonas reinhardtii journal November 2016
A New Assay for Promoter Analysis in Chlamydomonas Reveals Roles for Heat Shock Elements and the TATA Box in HSP70A Promoter-Mediated Activation of Transgene Expression journal November 2007
Synthetic promoters for CHO cell engineering: Synthetic Promoters for CHO Cell journal May 2014
Unsupervised learning of multiple motifs in biopolymers using expectation maximization journal January 1995
Targeted expression of nuclear transgenes in Chlamydomonas reinhardtii with a versatile, modular vector toolkit journal January 2015
Introducing Dunaliella LIP promoter containing light-inducible motifs improves transgenic expression in Chlamydomonas reinhardtii journal March 2016
Weeder Web: discovery of transcription factor binding sites in a set of sequences from co-regulated genes journal July 2004
Cis-regulatory code of stress-responsive transcription in Arabidopsis thaliana journal August 2011
A Streptomyces rimosus aphVIII gene coding for a new type phosphotransferase provides stable antibiotic resistance to Chlamydomonas reinhardtii journal October 2001
Heat shock factor 1 counteracts epigenetic silencing of nuclear transgenes in Chlamydomonas reinhardtii journal April 2013
Engineered Fusion Proteins for Efficient Protein Secretion and Purification of a Human Growth Factor from the Green Microalga Chlamydomonas reinhardtii journal October 2018
Simple Combinations of Lineage-Determining Transcription Factors Prime cis-Regulatory Elements Required for Macrophage and B Cell Identities journal May 2010
A fluorescence-activated cell sorting-based strategy for rapid isolation of high-lipid Chlamydomonas mutants journal October 2014
Expanding the spectral palette of fluorescent proteins for the green microalga Chlamydomonas reinhardtii journal April 2013
Epigenetic silencing of a foreign gene in nuclear transformants of Chlamydomonas. journal June 1997
Production of recombinant proteins in microalgae at pilot greenhouse scale: Recombinant Protein Production in Algae journal September 2014
Analysis of combinatorial cis-regulation in synthetic and genomic promoters journal November 2008