Build scalable screens for structural variation
Develop strategies to generate defined SVs across scales, directly read edit junctions, and link each variant to transcriptomic, chromatin, and fitness phenotypes at single-cell resolution.
Genome Biology · EMBL Heidelberg · Starting November, 2026
We develop scalable genome-editing technologies to generate, genotype, and phenotype thousands of designed structural variants. Our goal is to map sequence dispensability, decode noncoding genome architecture, and lay the foundation for minimal mammalian genomes.
Research Program
When do we truly understand a mammalian genome? Such understanding requires more than describing the function, or lack thereof, of each base pair. It also requires the ability to predict the consequences of sequence and structural variants and to design new genomes that function as intended.
We combine prime editing, recombinases, and CRISPR-Cas3 to engineer these changes at scale. We pair these perturbation strategies with long-read sequencing, phage polymerase-based genotyping, and emerging single-cell approaches to directly resolve engineered variants and connect them to changes in fitness and gene expression.
Building on this foundation, our lab will develop and apply technologies to design, generate, and phenotype thousands of defined SVs, advancing a functional understanding of mammalian genome architecture, illuminating the mechanisms by which SVs cause disease, and laying the foundation for designing streamlined mammalian genomes.
Develop strategies to generate defined SVs across scales, directly read edit junctions, and link each variant to transcriptomic, chromatin, and fitness phenotypes at single-cell resolution.
Systematically perturb ultraconserved noncoding elements, transposable-element families, and large chromatin domains to uncover the elements and mechanisms that shape gene regulation.
Identify the largest tolerated deletions, generate cells with megabase-sized deletions, and combine them with genome-wide knockout screens to uncover synthetic-lethal interactions and the design principles of robust genomes.
Publications
J. Koeppel, A. Keith, S. Sgrizzi, et al.
DOI: 10.64898/2026.05.29.728882
J. Koeppel*, R. Ferreira*, et al.
DOI: 10.1126/science.ado3979
J. Koeppel*, P. Murat*, et al.
DOI: 10.1101/2025.01.14.632548
S. Pinglay et al.
DOI: 10.1126/science.ado5978
J. Koeppel, J. Weller, T. Vanderstichele, L. Parts
DOI: 10.1038/s41588-024-01981-7
J. Koeppel*, J. Weller*, E. M. Peets*, et al.
DOI: 10.1038/s41587-023-01678-y
M. Slabicki*, H. Yoon*, J. Koeppel*, et al.
DOI: 10.1038/s41586-020-2925-1
* Equal contribution.
Resources
A lightweight web tool for exploring and visualizing flow cytometry data directly in the browser.
Team
Jonas develops genome engineering technologies to study how genomes work. He was a postdoctoral researcher in the Shendure and Pinglay labs at the University of Washington and completed his PhD with Leopold Parts at the Wellcome Sanger Institute and the University of Cambridge. Outside the lab, he enjoys photography, drawing, skiing, reading, hiking, and racket sports.
Predoctoral Fellow
After completing my bachelor's and master's degrees in biology at KIT and writing my master's thesis at Michael Zimmermann's lab at EMBL, I'm excited to join the Koeppel Lab for my PhD in genomics. When I'm not in a lab, I'm most often found diving, swimming, painting, taking pictures, or in front of my embroidery machine.
News
2026
Our preprint on gigabase-scale deletion scanning of the human genome was posted on bioRxiv.
2026
The Koeppel Lab is launching and recruiting its founding team.
2025
Our Science paper on genome randomization through recombination between repeat elements was published.
Contact
European Molecular Biology Laboratory
Genome Biology Unit
Meyerhofstraße 1
69117 Heidelberg
Germany
External Links