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Phenotypes Associated with This Genotype
Genotype
MGI:3687233
Allelic
Composition
Mapk1tm1.1Hed/Mapk1tm1.1Hed
Tg(Lck-cre)1Cwi/0
Genetic
Background
involves: C57BL/6 * DBA/2
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Mapk1tm1.1Hed mutation (0 available); any Mapk1 mutation (42 available)
Tg(Lck-cre)1Cwi mutation (3 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
homeostasis/metabolism
• Mapk1 protein levels are decreased ~3-fold at the DN3 stage and from 25-100-fold at the DN4 stage

immune system
• there is a substantial increase in number of DN3 thymocytes over DN4, consistent with partial block in maturation
• there is a larger decrease in CD4 T cells than CD8 T cells; ratio of CD4:CD8 goes down to 2.2 from 3.2 in wild-type
• there is a decrease in CD8 T cells; ratio of CD4:CD8 goes down to 2.2 from 3.2 in wild-type

hematopoietic system
• there is a substantial increase in number of DN3 thymocytes over DN4, consistent with partial block in maturation
• there is a larger decrease in CD4 T cells than CD8 T cells; ratio of CD4:CD8 goes down to 2.2 from 3.2 in wild-type
• there is a decrease in CD8 T cells; ratio of CD4:CD8 goes down to 2.2 from 3.2 in wild-type


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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last database update
01/28/2026
MGI 6.24
The Jackson Laboratory