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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Erbb2+
wild type
MGI:1929625
Summary 7 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
ht1
Erbb2tm1Cbm/Erbb2+ involves: 129P2/OlaHsd MGI:3530783
ht2
Erbb2tm8.1(Erbb2)Mul/Erbb2+ involves: 129S1/Sv * 129X1/SvJ MGI:3805581
cn3
Erbb2tm8(Erbb2)Mul/Erbb2+
Ptentm1Hwu/Ptentm1Hwu
Tg(MMTV-cre)7Mul/0
involves: 129S1/Sv * 129S4/SvJae * 129X1/SvJ * FVB/N MGI:4839510
cn4
Erbb2tm8(Erbb2)Mul/Erbb2+
Ptentm1Hwu/Pten+
Tg(MMTV-cre)7Mul/0
involves: 129S1/Sv * 129S4/SvJae * 129X1/SvJ * FVB/N MGI:4839508
cn5
Erbb2tm8(Erbb2)Mul/Erbb2+
Tg(MMTV-cre)7Mul/?
involves: 129S1/Sv * 129X1/SvJ * FVB/N MGI:3714371
cx6
Erbb2tm1Cbm/Erbb2+
Erbb3tm2Cbm/Erbb3+
Nrg1tm1Cbm/Nrg1+
involves: 129P2/OlaHsd MGI:3530779
cx7
Erbb2tm1Cbm/Erbb2+
Nrg1tm1Cbm/Nrg1+
involves: 129P2/OlaHsd MGI:3530776


Genotype
MGI:3530783
ht1
Allelic
Composition
Erbb2tm1Cbm/Erbb2+
Genetic
Background
involves: 129P2/OlaHsd
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Erbb2tm1Cbm mutation (0 available); any Erbb2 mutation (57 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
N
• no decrease in myelin thickness was observed on the sciatic nerve




Genotype
MGI:3805581
ht2
Allelic
Composition
Erbb2tm8.1(Erbb2)Mul/Erbb2+
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Erbb2tm8.1(Erbb2)Mul mutation (0 available); any Erbb2 mutation (57 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
reproductive system
N
• mammary gland morphology is indistinguishable from wild-type

nervous system
N
• appears to develop normally




Genotype
MGI:4839510
cn3
Allelic
Composition
Erbb2tm8(Erbb2)Mul/Erbb2+
Ptentm1Hwu/Ptentm1Hwu
Tg(MMTV-cre)7Mul/0
Genetic
Background
involves: 129S1/Sv * 129S4/SvJae * 129X1/SvJ * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Erbb2tm8(Erbb2)Mul mutation (0 available); any Erbb2 mutation (57 available)
Ptentm1Hwu mutation (17 available); any Pten mutation (86 available)
Tg(MMTV-cre)7Mul mutation (0 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• mammary tumor onset is accelerated in virgin females compared with either single Pten or single Erbb2 mutants, with tumor latencies of 2.4 compared with 15.5 months
• 25% of tumors are adenomyoepitheliomas
• 25% of tumors are Erbb2 type neoplasms
• 25% of tumors exhibit squamous metaplasia and retention of myoepithelium
• 25% of tumors are glandular, composed of distinctive large cell population that are a signature phenotype of mammary tumors in these mice
• tumors are similar to HER2 and basal-like subtype of human breast cancer

endocrine/exocrine glands
• mammary tumor onset is accelerated in virgin females compared with either single Pten or single Erbb2 mutants, with tumor latencies of 2.4 compared with 15.5 months
• 25% of tumors are adenomyoepitheliomas
• 25% of tumors are Erbb2 type neoplasms
• 25% of tumors exhibit squamous metaplasia and retention of myoepithelium
• 25% of tumors are glandular, composed of distinctive large cell population that are a signature phenotype of mammary tumors in these mice
• tumors are similar to HER2 and basal-like subtype of human breast cancer

integument
• mammary tumor onset is accelerated in virgin females compared with either single Pten or single Erbb2 mutants, with tumor latencies of 2.4 compared with 15.5 months
• 25% of tumors are adenomyoepitheliomas
• 25% of tumors are Erbb2 type neoplasms
• 25% of tumors exhibit squamous metaplasia and retention of myoepithelium
• 25% of tumors are glandular, composed of distinctive large cell population that are a signature phenotype of mammary tumors in these mice
• tumors are similar to HER2 and basal-like subtype of human breast cancer

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
breast cancer DOID:1612 OMIM:114480
J:133305




Genotype
MGI:4839508
cn4
Allelic
Composition
Erbb2tm8(Erbb2)Mul/Erbb2+
Ptentm1Hwu/Pten+
Tg(MMTV-cre)7Mul/0
Genetic
Background
involves: 129S1/Sv * 129S4/SvJae * 129X1/SvJ * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Erbb2tm8(Erbb2)Mul mutation (0 available); any Erbb2 mutation (57 available)
Ptentm1Hwu mutation (17 available); any Pten mutation (86 available)
Tg(MMTV-cre)7Mul mutation (0 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• mammary tumor onset is accelerated in virgin females compared with either single Pten or single Erbb2 mutants, with tumor latencies of 6.5 compared with 15.3 months
• tumor progression is associated with loss of heterozygosity at the Pten locus in 50% of mutant mammary tumors
• tumors are similar to basal-like subtype of human breast cancer
• 35% incidence of lung metastases compared with 5% in single Erbb2 mutants

endocrine/exocrine glands
• mammary tumor onset is accelerated in virgin females compared with either single Pten or single Erbb2 mutants, with tumor latencies of 6.5 compared with 15.3 months
• tumor progression is associated with loss of heterozygosity at the Pten locus in 50% of mutant mammary tumors
• tumors are similar to basal-like subtype of human breast cancer

integument
• mammary tumor onset is accelerated in virgin females compared with either single Pten or single Erbb2 mutants, with tumor latencies of 6.5 compared with 15.3 months
• tumor progression is associated with loss of heterozygosity at the Pten locus in 50% of mutant mammary tumors
• tumors are similar to basal-like subtype of human breast cancer

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
breast cancer DOID:1612 OMIM:114480
J:133305




Genotype
MGI:3714371
cn5
Allelic
Composition
Erbb2tm8(Erbb2)Mul/Erbb2+
Tg(MMTV-cre)7Mul/?
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Erbb2tm8(Erbb2)Mul mutation (0 available); any Erbb2 mutation (57 available)
Tg(MMTV-cre)7Mul mutation (0 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
endocrine/exocrine glands
• numerous lobular side buds with acinar structures are observed
• mice develop precocious lobualveolar hyperplasias of the mammary glands
• virgin female mutants develop mammary tumors with an average latency of 15.9 months with >90% affected by 2 years of age

neoplasm
• virgin female mutants develop mammary tumors with an average latency of 15.9 months with >90% affected by 2 years of age

integument
• numerous lobular side buds with acinar structures are observed
• mice develop precocious lobualveolar hyperplasias of the mammary glands
• virgin female mutants develop mammary tumors with an average latency of 15.9 months with >90% affected by 2 years of age

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
breast cancer DOID:1612 OMIM:114480
J:167180




Genotype
MGI:3530779
cx6
Allelic
Composition
Erbb2tm1Cbm/Erbb2+
Erbb3tm2Cbm/Erbb3+
Nrg1tm1Cbm/Nrg1+
Genetic
Background
involves: 129P2/OlaHsd
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Erbb2tm1Cbm mutation (0 available); any Erbb2 mutation (57 available)
Erbb3tm2Cbm mutation (0 available); any Erbb3 mutation (44 available)
Nrg1tm1Cbm mutation (0 available); any Nrg1 mutation (56 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• hypomyelination; thin myelin sheath of sciatic nerve observed at P10 and at 6 months of age
• reduced nerve conduction velocity measured in the sciatic nerve, but with normal current amplitudes and muscle compound action potentials




Genotype
MGI:3530776
cx7
Allelic
Composition
Erbb2tm1Cbm/Erbb2+
Nrg1tm1Cbm/Nrg1+
Genetic
Background
involves: 129P2/OlaHsd
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Erbb2tm1Cbm mutation (0 available); any Erbb2 mutation (57 available)
Nrg1tm1Cbm mutation (0 available); any Nrg1 mutation (56 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• hypomyelination; thin myelin sheath of sciatic nerve observed at P10 and at 6 months of age
• reduced nerve conduction velocity measured in the sciatic nerve, but with normal current amplitudes and muscle compound action potentials





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
01/20/2026
MGI 6.24
The Jackson Laboratory