Available Strain Details

Strain Information
Common Strain Name: LSL K-ras G12D Pricing and Ordering Information
Strain Nomenclature: B6.129-Krastm4Tyj/Nci
Animal State: Cryoarchived Strains
Release Category (Required for MTA form): B3,D


Strain Description: These mice carry a latent point-mutant allele of Kras2 (K-rasG12D). Cre-mediated recombination leads to deletion of a transcriptional termination sequence (Lox-Stop-Lox) and expression of the oncogenic protein.
Intranasal infection with an adenovirus encoding Cre resulted in a very high frequency of lung tumors. Homozygotes die in utero.
Mutation Information
Mutation Type: Targeted
Gene Name: Kirsten rat sarcoma oncogene, 2 expressed
Gene Symbol: Kras
Transgene Name:
Transgene Symbol:
Promotor Name:
Promotor Symbol:
Current Genetic Background: B6.129
Approx. Generation: 22
Organ Site: Lung
Additional Information
Cryopreservation Mating Scheme: The cryopreservation mating scheme is C57BL/6 females x heterozygous males. When maintained as a live colony, breeder pairs were distributed as a heterozygote (male or female) x wildtype C57BL/6 (male or female). This Kras allele is non-functional in its germline configuration; therefore the mice are maintained by backcrossing heterozygous animals to C57BL/6. Average litter size is 9.
Genotyping Information: Protocol 1: Allele: Kras<tm4Tyj>
Protocol 2: Allele: Kras<tm4Tyj>
Donating Investigator: Dr. Tyler Jacks

Key Reference: Jackson EL, Willis N, Mercer K,Bronson RT, Crowley D, Montoya R, Jacks T, and Tuveson DA. 2001. Analysis of lung tumor initiation and progression using conditional expression of K-ras. Genes and Development 15: 3243-3248 PMID: 11751630 [Pubmed Abstract]

Related Reference: Johnson L, Mercer K, Greenbaum D, Bronsont RT, Crowley D, Tuveson DA, and Jacks T. 2001 Somatic activation of the K-ras oncogene causes early onset lung cancer in mice. Nature 410:1111-1116 PMID: 11323676 [Pubmed Abstract]

Tuveson DA, Shaw AT, Willis NA, Silver DP, Jackson EL, Chang S, Mercer KL, Grochow R, Hock H, Crowley D, Hingorani SR, Zaks T, King C, Jacobetz MA, Wang L, Bronson RT, Orkin SH, DePinho RA, Jacks T. 2004. Endogenous oncogenic K-ras(G12D) stimulates proliferation and widespread neoplastic and developmental defects. Cancer Cell 5, 375-378. PMID:15093544 [Pubmed Abstract]