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Phenotypes Associated with This Genotype
Genotype
MGI:5508240
Allelic
Composition		 Krastm1Bbd/Kras+
Mapk1tm1.1Hed/Mapk1tm1.1Hed
Mapk3tm1Gpg/Mapk3tm1Gpg
Genetic
Background		 involves: 129/Sv * 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Krastm1Bbd mutation (2 available); any Kras mutation (71 available)
Mapk1tm1.1Hed mutation (0 available); any Mapk1 mutation (42 available)
Mapk3tm1Gpg mutation (1 available); any Mapk3 mutation (25 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
mortality/aging
premature death ( J:172200 )
• following intratracheal instillation of adenovirus expressing Cre-recombinase (Ad-Cre), mutants show 50% survival at 63 weeks versus 48 weeks in single Kras mutants, a 40% increase in survival

neoplasm
decreased classified tumor incidence ( J:172200 )
• 6 months following intratracheal instillation of adenovirus expressing Cre-recombinase (Ad-Cre), only a few tumors are observed; tumors that are found express normal levels of Mapk1

Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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Send questions and comments to User Support. 		last database update
07/22/2025
MGI 6.24 		The Jackson Laboratory