Worm Plasmids and Resources
Caenorhabditis elegans (C. elegans or “the worm”) is a widely used model organism because of its easy lab maintenance, short life cycle, and decades of biological research — in fact, it was the first multicellular organism to have its full genome sequenced. Its self-fertilizing hermaphroditic reproduction allows scientists to create uniform, homozygous genetic lines and easily maintain mutant strains. Genetic stocks can also be frozen indefinitely at -80 °C allowing for low maintenance long-term storage. Transgenic lines can be engineered using CRISPR/Cas9 gene editing or by feeding worms bacteria expressing dsDNA. Their transparent body, about 2–4 cells thick, makes them an excellent option for fluorescent microscopy and imaging experiments, without requiring dissection. Addgene also offers a selection of codon-optimized plasmids that can increase transgene expression. Browse our curated tables of plasmids and kits available at Addgene for use in worms.
Genome Engineering
CRISPR
The following table contains CRISPR/Cas9-based tools for generating modifications to the worm genome.
Please refer to Addgene's CRISPR Resources for a full selection of CRISPR plasmids.
| ID | Plasmid | Description | Gene/Insert | PI |
|---|
Additional CRISPR Resources
Single-Copy Insertion Tools
This table contains plasmids that are used for single-copy insertions in C. elegans. This includes plasmids used in MosTI, MosSCI, and miniMos. MosTI (modular safe harbor transgene insertion) uses homology directed repair mediated by CRISPR/Cas9 for efficient targeted insertion of a transgene at well defined safe harbors in the worm genome. MosSCI (mos1 mediated single-copy insertion) creates targeted double strand breaks using an excised Mos1 transposon which is repaired using the target plasmid as a template. Like MosSCI, miniMos uses the mos1 transposon to randomly integrate transgenes with high frequency and fidelity; the exact site of insertion can be determined by inverse PCR.
| ID | Plasmid | Description | Gene/Insert | PI |
|---|
Codon-Optimized Plasmids
The table below lists plasmids that have been codon-optimized for expression in C. elegans. Codon optimization addresses codon usage bias, the tendency of different species to preferentially use certain codons over others that encode the same amino acid. In these plasmids, the transgene sequence has been modified to use C. elegans' preferred codons, which can improve protein translation and overall transgene expression.
| ID | Plasmid | Description | Gene/Insert | PI |
|---|
Additional Optimized Plasmids Resources
Biosensors and Reporters
The following table contains plasmids for expressing biosensors or reporter genes in C. elegans, which can be used for detecting specific molecules or monitoring biological processes.
| ID | Plasmid | Description | Gene/Insert | PI |
|---|
Additional Biosensor and Reporter Resources
Neuroscience Tools
C. elegans is frequently used for neuroscience research. In addition to its short life cycle which is convenient for modeling neurodegenerative diseases, it was the first animal to have its complete nervous system mapped. The following table contains plasmids for expressing genes in worm neurons.
| ID | Plasmid | Description | Gene/Insert | PI |
|---|
Worm Plasmid Kits
The following kits were designed for a variety of uses in C. elegans. Kits are sets of plasmids intended to be used together (e.g. cloning and expression systems) and supplied as a single item.
| ID | Kit | Description | Application | PI |
|---|
Other Worm Resources
Synthetic Biology
Addgene Blog
External Resources
Credits
- Contributing Authors
- Written and reviewed by the Scientific Curation team at Addgene.
- Last Updated
- Content last reviewed on 18 August 2026. Catalog items are updated more frequently.
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