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Strain Name:
C57BL/6J-Junem1(pb/ERT2)Jdd/Mmjax
Stock Number:
076120-JAX
Citation ID:
RRID:MMRRC_076120-JAX
Other Names:
Jun-iCC

Strain Information

QUALITY CONTROL OF C57BL/6J-Junem1(pb/ERT2)Jdd/Mmjax  |  The Jackson Laboratory
Last Updated:
Strain Data and Information Information by Submitter Assessed by MMRRC1,2
Published Provided
Allele-specific genotype3n.d.
Genetic backgroundn.d.
Viability of genotypes available for distributionn.d.
Specific Pathogen- Status n.d.
Recoverability of cryopreserved sperm/embryos4 n.d.
Gene or allele sequence3 n.d.
Gene or allele expression3n.d.
Gene or allele function3n.d.
Observable and/or measurable phenotypesn.d.
Fertility of genotypes available for distributionn.d.
Fecundity/breeding performancen.d.

1 When indicated as "assessed by MMRRC" ("YES"), please note that the information presented on this strain is to the best of our knowledge correct and up-to-date at the the MMRRC Distribution Center assigned to maintain and distribute this strain. This information is subject to change due to breeding, maintenance, and other actions. Please direct any questions on the information presented in this table to the MMRRC Distribution Center.

2 If an assessment has not been performed by the MMRRC (as indicated by "NO"), investigators may request specific testing for a fee. Requests should be submitted directly to the MMRRC Distribution Center assigned to the management, archiving, and distribution of the strain. A full listing of available testing and analytical services is available at https://www.mmrrc.org/about/services.php.

3 This information may or may not apply to each individual engineered allele (e.g., Cre, FlpO) present in the strain.

4 Recovery refers to thawing, in vitro fertilization (IVF), and/or embryo culture leading to live offspring.

Junem1(pb/ERT2)Jdd
Name: Jun proto-oncogene, AP-1 transcription factor subunit; endonuclease-mediated mutation 1, Joseph D Dougherty
Type: Allele
Species: Multi-species
Chromosome: 4
Alteration at locus: CRISPR
Jun
Name: Jun proto-oncogene, AP-1 transcription factor subunit
Type: Gene
Species: Mus musculus (mouse)
Chromosome: 4
NCBI: 16476
HGNC: HGNC:6204
Homologene: 1679
Genetic Alterations
Using CRISPR/Cas9 endonuclease-mediated genome editing, a single guide RNA was used to introduce a hyperactive piggyBac transposase (hyPB), myc tag and an ERT2 fusion gene into the C-terminal domain of the Jun proto-oncogene, AP-1 transcription factor subunit (Jun) gene.
ES Cell Line
Not applicable
Phenotype

Junem1(pb/ERT2)Jdd (Jun-iCC) mice develop normally and show no behavioral abnormalities.

The Jun-iCC construct remains inactive under baseline conditions and requires tamoxifen administration and neuronal activity to drive transposon insertion. Under these conditions, Jun-iCC mice captured neural activity during pharmacologically induced seizures, although Jun-iCC yields relatively low numbers of insertions, likely due to the transient expression of Jun.

Strain GQC Summary
Gene Specific Genotyping:

To request gene-specific and other genotyping services for a strain, please contact the distribution MMRRC Center for more information.

Background Genetic Quality:

The MMRRC has developed a Genetic Quality Control pipeline using the MiniMUGA array to provide additional information to identify and validate genetic backgrounds of MMRRC strains. For more information on whether genetic background data is available, please contact MMRRC_GeneticQC@med.unc.edu. Note: that MiniMUGA genetic background data is not available on all strains, but can be ordered if desired.

Suggested Control Mice
Littermates of all relevant genotypes.
  • Neuronal Activity
  • Neural Circuits / Brain Mapping
  • Neurologic Disease Models
  • Neurobiology
  • Gene Expression Regulation
  • Signal Transduction
  • Seizures / Epilepsy Models
  • Recombinase Systems / Genetic Techniques
  • Gene Expression Profiling
Submitter
Joseph Dougherty, Ph.D., Washington University School of Medicine in St. Louis.
Primary Reference

Sarafinovska S, Venkatesan A, Akinwe T, Chamessian A, Chen X, Payne M, Creed MC, Mitra RD, Dougherty JD. Inducible Calling Cards: Developing Mouse Reagents for Experimentally Controlled Transposon Insertion in vivo. bioRxiv [Preprint]. 2025 Nov 5:2025.11.04.685928. doi: 10.1101/2025.11.04.685928. (Medline PMID: 41279397)

Strain Development
CRISPR-Cas9 mediated homology-directed repair was used to generate transcription factor (TF)-hyPB-myc-ERT2 knock-in mice. For Jun targeting, guide RNAs were designed and evaluated for off-target effects, with optimal candidates selected based on proximity to target sites. Donor templates contained left and right homology arms flanking the hyPBase-myc-ERT2 cassette. Fertilized C57BL/6J oocytes were electroporated with verified gRNAs, Cas9 protein, and donor templates. Random integration was assessed with TF-specific primers for both 5' and 3' integration sites. Successful founders with targeted integration at both junctions were identified via PCR and Sanger sequencing, including Jun-targeted males M2, M8, M34, M45 and females F1, F28, F30. Each line was validated for viability and fertility. Sperm from two proven male breeders was cryopreserved and stored. Heterozygous Jun-iCC males were crossed to our in-house C57BL/6J females for 2-5 generations for breeding. Prior to archival and maintenance at the MMRRC, this line was refreshed every 8-10 generations by backcrossing to freshly obtained C57BL/6J males and females.

Disclaimer: If MMRRC Strain Genetic Quality Control (GQC; based on MiniMUGA genotyping and analysis) has been completed for this strain, the information might differ from the genetic background information provided by the submitter. MiniMUGA genetic analysis is done on a strain's tissue samples taken when archived by or ordered from the assigned MMRRC Center.

Colony and Husbandry Information

For more information about this colony's health status contact csmmrrc@jax.org
Coat Color
Black
Eye
Black
MMRRC Breeding System
Backcross
Generation
2-5
Overall Breeding Performance
Good
Viability and Fertility: Female Male Comments
Homozygotes are viable: Undetermined Undetermined
Homozygotes are fertile: Undetermined Undetermined
Heterozygotes are fertile: Yes Yes
Age Reproductive Decline: Undetermined Undetermined
Average litter size
7 to 9
Recommended wean age
3 Weeks
Average Pups Weaned
7 to 9

Order Information

Limited quantities of breeder mice (up to 2 males and 2 females or 4 mice) per investigator per month are available from a live colony, usually available to ship in under 12 weeks. Larger quantities may be available, please contact the distributing center directly at csmmrrc@jax.org for more details.

Cryopreserved material may be available upon request, please inquire to csmmrrc@jax.org for more information.

A Commercial License Agreement from the Submitter is required for for-profit entities to use this strain. For more information, please contactOffice Of Technology Management.

Distribution of this strain requires submission of the MMRRC Conditions of Use (COU). A link to the COU web form will be provided via email after an order has been placed; the form should be completed then or the email forwarded to your institutional official for completion.

A Commercial License Agreement from the Submitter is required for for-profit entities to use this strain. For more information, please contact Office Of Technology Management

Additional charges may apply for any special requests. Shipping costs are in addition to the basic distribution/resuscitation fees. Information on shipping costs and any additional charges will be provided by the supplying MMRRC facility.

Click button to Request this one strain. (Use the MMRRC Catalog Search to request more than one strain.)
MMRRC Item # Description Distribution Fee / Unit (US $)
*Shipping & Handling not included*
Units Notes
076120-JAX-HET-F
076120-JAX-HET-M
076120-JAX-WT-F
076120-JAX-WT-M
Heterozygous / Hemizygous Female
Heterozygous / Hemizygous Male
Wild Type Female
Wild Type Male
$236.00 / $236.00
Non-Profit / For-Profit
Per Mouse The csmmrrc@jax.org may assess additional fees for any special requests (e.g., specific age or weight of mice, etc.).
Cryopreserved material may be available upon request, please inquire to csmmrrc@jax.org for more information.

Some MMRRC strains were submitted by the submitter as cryopreserved germplasm, and because these strains were not cryopreserved by the MMRRC, we have not assessed the quality, nor genotype, of this material. Our expertise in reviving mice from various qualities of frozen sperm and embryos, using methods like IVF and ICSI, gives us confidence in successful recoveries in most cases. However, due to the uncertain quality of these samples, we'll limit revival attempts to two per order. Additional attempts are available for a fee, on top of standard charges, if requested. It's important to note that some strains may lack the expected mutation, so we can't assure successful order fulfillment until we attempt to revive the strain.

1 The distribution fee covers the expense of rederiving mice from a live mouse; you will receive the resulting litter. The litter will contain at minimum one mutant carrier; the actual number of animals and the gender and genotype ratios will vary. (Typically, multiple breeder pairs can be established from the recovered litter.) Prior to shipment, the MMRRC will provide information about the animals recovered. If you anticipate or find that you need to request specific genotypes, genders or quantities of mice in excess of what is likely from a resuscitated litter, you may discuss available options and pricing with the supplying MMRRC facility.

2 An aliquot contains a sufficient number of embryos (in one or more vials or straws and based on the transfer success rate of the MMRRC facility) to transfer into one to three recipients. The MMRRC makes no guarantee concerning embryo transfer success experienced in the recipient investigator's laboratory. Neither gender nor genotype ratios are guaranteed.

3 An aliquot is one straw or vial with sufficient sperm to recover at least one litter of mice, as per provided protocols, when performed at the MMRRC facility. The MMRRC makes no guarantee concerning the success of these procedures when performed outside the MMRRC facilities.

4 The distribution fee covers the expense of resuscitating mice from the cryo-archive; you will receive the resulting litter. The litter will contain at minimum one mutant carrier; the actual number of animals and the gender and genotype ratios will vary. (Typically, multiple breeder pairs can be established from the recovered litter.) Prior to shipment, the MMRRC will provide information about the animals recovered. If you anticipate or find that you need to request specific genotypes, genders or quantities of mice in excess of what is likely from a resuscitated litter, you may discuss available options and pricing with the supplying MMRRC facility.

To request material from the MMRRC: Please fill out our on-line request form (accessible from the catalog search results page, or click the Request this Strain button in the fees section). If you have questions or need assistance completing this form, you may call Customer Service at (800) 910-2291 (in USA or Canada) or (530) 757-5710 (international calls). Before you call, please have with you: the MMRRC item number, quantity needed, Bill-to and Ship-to contact information.