MNEXT > Vacatures > Optimization of ONT sequencing-based Quality Control System for CRISPR-Cas9 Strain Improvement.
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Optimization of ONT sequencing-based Quality Control System for CRISPR-Cas9 Strain Improvement.

Precision fermentation, which uses genetically modified microorganisms to create sustainable alternatives like chemicals and biofuels, is rapidly advancing. A key part of this process is strain improvement—editing microbial DNA to boost performance. At MNEXT, CRISPR-Cas9 is used for this, but the technique can cause off-target mutations that reduce accuracy and reliability. To improve this, the team developed a quality control system using Oxford Nanopore sequencing to detect both intended and unintended genetic changes. Data is analyzed with the CRISTOFF platform, which has already proven effective in identifying insertions and deletions. However, it still needs optimization to reliably detect smaller variants and better distinguish natural mutations from true off-target effects.
Startdatum 01 September 2025
Solliciteren voor 22 August 2025
Ervaring Internship
Locatie Breda
Solliciteren

Project objective

The primary goal of this project is to optimize and expand upon the CRISTOFF pipeline to be able to detect on/off-target insertions in Nanopore sequencing data.

Expected Outcomes

The project will lead to the optimization of the CRISTOFF pipeline, enabling it to handle both insertions, deletions and smaller genetic variants in CRISPR-Cas9 strain improvement applications. The results will be validated using both in-house and publicly available sequencing datasets to assess the sensitivity, specificity, and overall performance of the updated platform. This will contribute to enhancing the accuracy and reliability of CRISPR-based genetic modifications, reducing potential off-target effects, and providing a more robust quality control tool for precision fermentation.

Skills and Competencies Gained

  1. Bioinformatics Expertise:
    • Hands-on experience in working with Oxford Nanopore sequencing data.
    • Understanding of genome-wide CRISPR-Cas9 editing techniques, including off-target and on-target mutation analysis.
    • Proficiency in using and optimizing bioinformatics pipelines such as CRISTOFF for genetic modification analysis.
  2. Data Analysis and Interpretation
    • Strong ability to analyse and interpret sequencing data, with a focus on detecting genetic variations such as insertions, deletions and single nucleotide variations.
    • Experience in comparing the performance of different bioinformatics tools and algorithms in terms of accuracy, sensitivity and efficiency.
  3. Algorithm Development and Optimization
    • Skills in improving bioinformatics algorithms, particularly for sequencing data analysis.
    • Understanding of statistical methods used to enhance detection capabilities for genetic modifications.
  4. Research and Documentation
    • Experience in scientific research, including the design of experiments, data collection and comprehensive reporting.
    • Skill in documenting methodologies and results to produce clear, concise and informative reports for stakeholders.

Starting Date & Compensation

September 2025. The length of the internship graduation assignment is approximately 20-30 weeks, depending on the scope and depth of the research conducted. The student will get an internship fee of €350, – per month.

Mentorship and Guidance

The intern will be supervised by experienced researchers and professionals in biotechnology and bioinformatics (MNEXT-Smart Fermentation, Tim Verschuren and Bazante Sanders), with regular progress reviews and support to ensure the successful completion of project objectives.

Meer informatie? Neem contact op met:

Tim Verschuren

Mail t.verschuren3@avans.nl Solliciteer direct

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