Strain Name:
FVB/N-Jak2tm1Kuw/Mmmh
Stock Number:
071382-MU
Citation ID:
RRID:MMRRC_071382-MU
Other Names:
Jak2 floxed [Jak2 tm1Kuw]

Strain Information

Jak2tm1Kuw
Name: Janus kinase 2; targeted mutation 1, Kay-Uwe Wagner
Synonyms: Jak2fl
Type: Allele
Species: Mus musculus
Chromosome: 19
Alteration at locus: Targeted Mutation
Jak2
Name: Janus kinase 2
Synonyms: C81284
Type: Gene
Species: Mouse
Chromosome: 19
Alteration at locus: Targeted Mutation
NCBI: 16452
VEGA: 19
HGNC: HGNC:6192
Homologene: 21033
Genetic Alterations
Targeted insertion. The first coding exon (exon 2) was flanked by loxP sites.
ES Cell Line
RW-4
Phenotype
None/Normal/Wild-type

Conditional phenotype: Since 2004, many developmental abnormalities were reported when the JAK2 gene was conditionally deleted with Cre recombinase in various cell types, tissues, and organs (e.g., hematopoiesis, liver function, mammary gland development, and tumor development).

MeSH Terms
  • Animals
  • Erythropoiesis/genetics
  • Exons/genetics
  • Female
  • Fetal Death/genetics
  • Gene Deletion
  • Janus Kinase 2
  • Mammary Tumor Virus, Mouse/genetics
  • Mice
  • Mice, Knockout
  • Pregnancy
  • Protein-Tyrosine Kinases/deficiency
  • Protein-Tyrosine Kinases/genetics
  • Proto-Oncogene Proteins/deficiency
  • Proto-Oncogene Proteins/genetics
  • Cell Differentiation
  • Cell Division
  • DNA-Binding Proteins/deficiency
  • DNA-Binding Proteins/genetics
  • DNA-Binding Proteins/metabolism
  • Epithelial Cells/cytology
  • Epithelial Cells/enzymology
  • Epithelial Cells/transplantation
  • Lactation/genetics
  • Lactation/metabolism
  • Mammary Glands, Animal/cytology
  • Mammary Glands, Animal/enzymology
  • Mammary Glands, Animal/growth & development
  • Milk Proteins
  • Phenotype
  • Prolactin/metabolism
  • Protein-Tyrosine Kinases/physiology
  • Proto-Oncogene Proteins
  • Receptors, Prolactin/metabolism
  • STAT5 Transcription Factor
  • Signal Transduction
  • Trans-Activators/deficiency
  • Trans-Activators/genetics
  • Trans-Activators/metabolism
Strain Development
A targeting vector was constructed by placing a PGK-neomycin (PGK-neo) selectable marker flanked by loxP sites (floxed) 570 bp upstream of the first coding exon. A third loxP site was introduced 500 bp downstream of the coding sequence within the consecutive intron. The floxed allele of the Jak2 gene was generated through homologous recombination in isogenic mouse embryonic stem (ES) cells (i.e., RW-4 cells from Incyte Genomics). Twelve correctly targeted clones were identified by Southern blot using EcoR1 or EcoRV restriction digest of genomic DNA and a 3' external probe that was not part of the targeting vector. Two ES cell clones (#2 and #88) were expanded and used for the production of chimeras (C57Bl/6). Since 2006, the target JAK2 floxed allele was bred for more than 16 generations with wildtype FVB/N.
Suggested Control Mice
wildtype FVB/N
MMRRC Genetic QC Summary
The MMRRC Centers have developed a genetic QC pipeline using MiniMUGA array genotyping to provide additional information on strain backgrounds for MMRRC congenic and inbred strains. For more information on when data may be available, or to request genotyping for a strain of interest, please contact mmrrc@missouri.edu. Older strains may not have this information.
  • Cancer
  • Cardiovascular
  • Cell Biology
  • Developmental Biology
  • Diabetes
  • Endocrine Deficiency
  • Hematology
  • Immunology and Inflammation
  • Internal/Organ
  • Models for Human Disease
  • Neurobiology
  • Obesity
  • Reproduction
  • Research Tools
Donor
Kay-Uwe Wagner, Ph.D., Karmanos Cancer Institute.
Primary Reference

Krempler A, Qi Y, Triplett AA, Zhu J, Rui H, Wagner KU. Generation of a conditional knockout allele for the Janus kinase 2 (Jak2) gene in mice. Genesis. 2004 Sep;40(1):52-7. doi: 10.1002/gene.20063. (Medline PMID: 15354294)

Wagner KU, Krempler A, Triplett AA, Qi Y, George NM, Zhu J, Rui H. Impaired alveologenesis and maintenance of secretory mammary epithelial cells in Jak2 conditional knockout mice. Mol Cell Biol. 2004 Jun;24(12):5510-20. doi: 10.1128/MCB.24.12.5510-5520.2004. (Medline PMID: 15169911)

Colony and Husbandry Information

Colony Surveillance Program and Current Health Reports

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 mmrrc@missouri.edu.
Coat Color
White
Eye
Pink
MMRRC Breeding System
Random intra-strain mating
Generation
16+ generations
Overall Breeding Performance
Excellent
Viability and Fertility: Female Male Comments
Homozygotes are viable: Yes Yes
Homozygotes are fertile: Yes Yes
Heterozygotes are fertile: Yes Yes
Age Reproductive Decline: 10 to 12 months Greater than 12 months
Bred to Homozygosity
Yes
Average litter size
10 to 14
Recommended wean age
3 Weeks
Average Pups Weaned
10 to 14

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.

Cryopreserved material may be available upon request, please inquire to mmrrc@missouri.edu for more information.

The donor or their institution limits the distribution to non-profit institutions only.

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 $)
*Shipping & Handling not included*
Units Notes
071382-MU-SPERM Cryo-preserved spermatozoa $437.00 / Non-Profit Aliquot Approximate quantity3
071382-MU-RESUS Litter recovered from cryo-archive $2,697.00 / Non-Profit Litter Recovered litter4; additional fees for any special requests.
Cryopreserved material may be available upon request, please inquire to mmrrc@missouri.edu for more information.

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.