Pitfalls of using sequence databases for heterologous expression studies - a technical review

Area of Science:

• Molecular Biology
• Genomics
• Bioinformatics

Background:

• Gene synthesis from public databases is replacing traditional cloning methods.
• Database entries derived from genome sequencing are susceptible to errors.
• Sequence inaccuracies can lead to mischaracterization of protein function in heterologous systems.

Purpose of the Study:

• To identify common errors in public gene sequence databases.
• To provide a strategy for bypassing these errors in gene synthesis.
• To prevent critical mistakes in functional studies of proteins.

Main Methods:

• Analysis of common errors in public gene sequence databases.
• Review of literature on gene annotation and sequence validation.
• Development of a strategic approach to mitigate sequence discrepancies.

Main Results:

• Identified five recurring problems: incomplete annotation, incorrect annotations, automated transcript corrections, sequence mismatches (gene, mRNA, protein), and lack of splicing validation.
• Highlighted the impact of these errors on protein functional characterization.
• Proposed a bypass strategy for accurate gene synthesis.

Conclusions:

• Errors in public gene sequence databases pose significant risks for protein research.
• Implementing a validation strategy is crucial for reliable gene synthesis and functional studies.
• Accurate sequence information is essential for advancing research in heterologous expression systems.