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JM8A3
In this model, exons 3-14 of human TMPRSS2 (ENSG00000184012.14) have been inserted in-frame into exon 2 (ENSMUSE00000641779) of the mouse Tmprss2 gene. CRISPR RNP was used to assist with homologous recombination (HR) using dsDNA repair template in ES cells. The mouse exon 2 splice acceptor and the guide protospacer (nt 1-17) were removed from the HR template to prevent potential downstream splicing or RNP re-cleavage. The expression of the human CDS is controlled by the mouse regulatory systems (including 3’UTR), and predicted to terminate with the transgene’s STOP codon without expression of the endogenous sequence.
CRISPR RNP was used to assist with homologous recombination using dsDNA repair template in JM8A3 ES cells derived from C57BL/6N. Following blastocyst injection, the chimeras were mated with C57BL/6NCrl to create germline heterozygotes. Long-range PCR products were fully sequenced; potential off-targets were absent. Subsequent backcross to C57BL/6NCrl.
The expression pattern for Tmprss2/TMPRSS2 is similar between mice and humans, and it is especially high in the lungs.
Colony Surveillance Program and Current Health Reports
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 mmrrc@ucdavis.edu for more details.
Cryopreserved material may be available upon request, please inquire to mmrrc@ucdavis.edu for more information.
A license from third party patent owner(s) may be required for for-profit entities to use mouse models derived from CRISPR-Cas9 technologies and it is the Users sole responsibility to determine whether such a license is necessary.
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.
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.