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Heterologous and cell free protein expression systems
Naser Farrokhi1, Maria Hrmova, Rachel A Burton
1Department of Biological Sciences, California State University, Long Beach, CA, USA.
Methods in Molecular Biology (Clifton, N.J.)
|April 7, 2009
Summary
Accurate gene function assignment requires experimental validation beyond sequence similarity. This study reviews heterologous and cell-free protein expression systems for robust functional analysis, addressing challenges like low abundance and membrane protein expression.
Area of Science:
- Genomics
- Molecular Biology
- Biochemistry
Background:
- Limited experimental validation exists for many annotated genes in databases.
- Reliance on sequence similarity for gene function assignment is insufficient.
- Purifying low-abundance, multi-isoform, or modified proteins presents significant technical challenges.
Purpose of the Study:
- To shift focus towards accurate experimental gene function assignment.
- To reduce dependence on sequence similarity for genome annotation.
- To review and present current protein expression systems for functional genomics.
Main Methods:
- Heterologous expression systems in host organisms.
- Prokaryotic and eukaryotic cell-free protein synthesis systems.
- Strategies for expressing challenging membrane-associated proteins.
Main Results:
- Common host systems for heterologous expression are reviewed.
- Current status of cell-free expression systems is presented.
- New approaches for membrane protein expression are discussed.
Conclusions:
- Experimental protein expression is crucial for accurate gene function annotation.
- Cell-free and heterologous systems offer viable solutions for protein production.
- Addressing expression challenges enhances the utility of genomic data.
