Strain Name:
Stock Number:
Citation ID:
Other Names:
ProkR2-Cre, PR2-Cre

Gene Information

Allele: Prokr2em1(icre)Cfe (Mus musculus (mouse))
Name: prokineticin receptor 2; endonuclease-mediated mutation 1, Carol F Elias
Synonyms: Prokr2-Cre
Chromosome: 2
Alteration at locus: CRISPR
Monarch Initiative (Disease and Phenotype Associations): MGI:6119460
Transgene: cre (Enterobacteria phage P1 (bacteriophage P1))
Name: cre recombinase
Alteration at locus: CRISPR
Monarch Initiative (Disease and Phenotype Associations):
Gene Symbol: Prokr2 (Mus musculus (mouse))
Name: prokineticin receptor 2
Synonyms: Gpcr73l1, PKR2, B830005M06Rik, Gpr73l1, EG-VEGRF2
Chromosome: 2
Alteration at locus: CRISPR
Monarch Initiative (Disease and Phenotype Associations): MGI:2181363
Genetic Alterations
Between the final Prokr2 codon and termination codon, a GSG linker, a T2A viral peptide, an iCre recombinase, and a bovine growth hormone polyadenylation signal (bPA) were inserted (Goodwin and Rottman 1992; Kim et al. 2011; Shimshek et al. 2002) using CRISPR/Cas9 technology.
Genotype Determination
ES Cell Line

Homozygous: No changes in GnRH migration, olfactory bulb development, reproductive function, and body weight have been observed in homozygous mice.

Hetero/Hemizygous: No changes in GnRH migration, olfactory bulb development, reproductive function, and body weight have been observed in heterozygous/hemizygous mice.


MeSH Terms
    Strain Development

    Detailed description as published in Mohsen et al., 2017:

    We used the Clustered Regularly Interspaced Short Palindromic Repeats associated protein Cas9 (CRISPR/Cas9) technology (Cong et al. 2013Mali et al. 2013) to generate a transgenic mouse line that expresses Cre recombinase in Prokr2-expressing cells. A single guide RNA (sgRNA) target and protospacer adjacent motif was identified on the coding strand: 5’ CCTCGACCTCAAAACCAGCG GGG3 3’ with a predicted cut site 44 bp upstream of the termination codon. The sgRNA target is located at mouse chromosome 2, nucleotides 132373439-132373459 (NCBI Reference Sequence: NC_000068.7). The activity of sgRNA/Cas9 complex at the target was demonstrated by analysis of genomic DNA extracted from blastocysts that developed in in vitro culture from mouse zygotes that had been microinjected with Cas9 reagents, as described (Sakurai et al. 2014). DNA sequence analysis of PCR products obtained by amplification across the Cas9 target showed the presence of insertions/deletions (indels) in the genomic DNA due to non-homologous end joining repair of double-strand chromosome breaks induced by sgRNA/Cas9 complexes. After the demonstration of effective Cas9 cleavage of the target, a donor plasmid for homology directed repair was synthesized that included 800 bp of sequence upstream of the sgRNA target. Multiple silent coding changes were introduced in the Cas9 target to block Cas9 re-cleavage after correct repair of chromosome breaks by the donor DNA: 5’ CCTCGACtTaAAgACatctG GcG 3’. Between the final Prokr2 codon and termination codon a GSG linker, a T2A viral peptide, an iCre recombinase, and a bovine growth hormone polyadenylation signal (bPA) were inserted (Goodwin and Rottman 1992Kim et al. 2011Shimshek et al. 2002). Immediately downstream of the bPA was the endogenous Prokr2 termination codon and 797 bp of genomic sequence that comprised the 800 bp 3’ arm of homology. The sgRNA target was cloned into the plasmid pX330 ( plasmid #42230, a kind gift of Feng Zhang) as described (Ran et al. 2013). The circular pX330 plasmid (5 ng/uL final concentration) (Mashiko et al. 2013) and circular donor plasmid (10 ng/uL final concentration) were mixed together for microinjection. Fertilized eggs were produced by mating superovulated B6SJLF1 with B6SJLF1 males (JAX Strain #100012). Pronuclear microinjection was carried out as described (Becker and Jechow 2011Van Keuren et al. 2009). A total of 293 zygotes were microinjected, 255 surviving zygotes were transferred to B6D2F1 (JAX Strain #100006) pseudopregnant female mice and 85 pups were born. Genotyping of genomic DNA extracted from tail tip biopsies was performed by PCR with primers internal to and external to the DNA donor plasmid, and confirmed by DNA sequencing analysis. Single copy integration was confirmed by PCR. Two primers pairs were used. The 5’ pair included a primer outside the 5’ arm of homology and one inside Cre recombinase. The 3’ pair included a primer outside the 3’ arm of homology and one inside Cre recombinase. Following identification of Prokr2-Cre founders, quantitative PCR of genomic iCre was performed to determine the integration events in heterozygous and homozygous mice. Interleukin 2 (Il2 gene) was used as a random control for positive homozygosity.
    Suggested Control Mice
    Wild-type littermates
    • Developmental Biology
    • Endocrine Deficiency
    • Models for Human Disease
    • Reproduction
    • Sensorineural
    Carol F. Elias, Ph.D., University of Michigan.

    Colony and Husbandry Information

    Mice recovered from a cryo-archive will have health surveillance performed on recipient females. Health reports will be provided prior to shipment. If you require additional health status information, please email .
    Coat Color
    MMRRC Breeding System
    Random intra-strain mating
    Overall Breeding Performance
    NOTE: "Hemizygote" as used here refers to males carrying a mutation on the X Chromosome or mice of either sex carrying an inserted transgene with no homologous allele on the other chromosome.
    Viability and Fertility: Female Male Comments
    Homozygotes are viable: Yes Yes
    Homozygotes are fertile: Yes Yes
    Hetero/Hemizygotes are fertile: Yes Yes
    Age Reproductive Decline: Undetermined Undetermined
    Bred to Homozygosity
    Average litter size
    Recommended wean age
    3 weeks
    Average Pups Weaned

    Order Request Information

    Limited quantities of breeder mice (recovered litter) are available from a cryoarchive; recovered litter usually available to ship in 3 to 4 months.

    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.

    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 $) Units Notes
    043846-JAX-SPERM Cryo-preserved spermatozoa $437.00 / $437.00
    Non-Profit / For-Profit
    Aliquot Approximate quantity2
    043846-JAX-RESUS Litter recovered from cryo-archive $2,022.00 / $2,022.00
    Non-Profit / For-Profit
    Litter Recovered litter1; additional fees for any special requests.

    1 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.

    2 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.

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

    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.