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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Grb2+
wild type
MGI:2436070
Summary 5 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
ht1
Grb2tm1Paw/Grb2+ involves: 129S1/Sv * 129X1/SvJ MGI:2679600
ht2
Grb2tm1Paw/Grb2+ involves: 129S1/Sv * 129X1/SvJ * BALB/c MGI:3714659
cn3
Grb2tm1Paw/Grb2+
Ptentm2Mak/Ptentm2Mak
Tg(Lck-cre)548Jxm/0
involves: 129P2/OlaHsd * C57BL/6 * CBA MGI:3717275
cx4
Grb2tm1Paw/Grb2+
Ptentm1Mak/Pten+
involves: 129P2/OlaHsd * 129S1/Sv * 129X1/SvJ * C57BL/6 MGI:3717274
cx5
Grb2tm1Paw/Grb2+
Tg(MMTV-PyVT)634Mul/?
involves: 129S1/Sv * 129X1/SvJ * FVB/N MGI:2679599


Genotype
MGI:2679600
ht1
Allelic
Composition
Grb2tm1Paw/Grb2+
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Grb2tm1Paw mutation (0 available); any Grb2 mutation (45 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
normal phenotype




Genotype
MGI:3714659
ht2
Allelic
Composition
Grb2tm1Paw/Grb2+
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * BALB/c
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Grb2tm1Paw mutation (0 available); any Grb2 mutation (45 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
• mice exhibit reduced susceptibility to Friend erythroleukemia virus (FV)
• spleen size following FV infection is not as inflamed as in wild-type mice




Genotype
MGI:3717275
cn3
Allelic
Composition
Grb2tm1Paw/Grb2+
Ptentm2Mak/Ptentm2Mak
Tg(Lck-cre)548Jxm/0
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6 * CBA
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Grb2tm1Paw mutation (0 available); any Grb2 mutation (45 available)
Ptentm2Mak mutation (4 available); any Pten mutation (86 available)
Tg(Lck-cre)548Jxm mutation (2 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• thymic lymphomas develop with a mean age of onset of 60 days, similar to that seen in T cell-specific Pten homozygotes

endocrine/exocrine glands
• thymic lymphomas develop with a mean age of onset of 60 days, similar to that seen in T cell-specific Pten homozygotes

immune system
• thymic lymphomas develop with a mean age of onset of 60 days, similar to that seen in T cell-specific Pten homozygotes

hematopoietic system
• thymic lymphomas develop with a mean age of onset of 60 days, similar to that seen in T cell-specific Pten homozygotes




Genotype
MGI:3717274
cx4
Allelic
Composition
Grb2tm1Paw/Grb2+
Ptentm1Mak/Pten+
Genetic
Background
involves: 129P2/OlaHsd * 129S1/Sv * 129X1/SvJ * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Grb2tm1Paw mutation (0 available); any Grb2 mutation (45 available)
Ptentm1Mak mutation (1 available); any Pten mutation (86 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
endocrine/exocrine glands

mortality/aging
N
• the embryonic lethality seen in Ptentm1Mak heterozygotes is completely rescued

neoplasm
• develop the same tumor types at the same frequency as Ptentm1Mak heterozygotes, including neoplastic lesions in the breast, endometrium, prostate, adrenal gland, and lymphoid organs; tumor stage, grade, and metastatic potential are similar to that in Ptentm1Mak heterozygotes

reproductive system




Genotype
MGI:2679599
cx5
Allelic
Composition
Grb2tm1Paw/Grb2+
Tg(MMTV-PyVT)634Mul/?
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Grb2tm1Paw mutation (0 available); any Grb2 mutation (45 available)
Tg(MMTV-PyVT)634Mul mutation (2 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• delayed onset of mammary tumorigenesis compared to wild-type Grb2 mice carrying transgene

integument
• delayed onset of mammary tumorigenesis compared to wild-type Grb2 mice carrying transgene

endocrine/exocrine glands
• delayed onset of mammary tumorigenesis compared to wild-type Grb2 mice carrying transgene





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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
01/20/2026
MGI 6.24
The Jackson Laboratory