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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Rhohtm1Brak
targeted mutation 1, Cord Brakebusch
MGI:3826431
Summary 3 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Rhohtm1Brak/Rhohtm1Brak involves: 129/Sv * C57BL/6 MGI:3826455
cx2
Rhohtm1Brak/Rhohtm1Brak
Itgb2tm2Bay/Itgb2tm2Bay
involves: 129/Sv * C57BL/6 MGI:3826459
cx3
Rhohtm1Brak/Rhohtm1Brak
Tg(TcraTcrb)425Cbn/?
involves: 129/Sv * C57BL/6 MGI:3826463


Genotype
MGI:3826455
hm1
Allelic
Composition
Rhohtm1Brak/Rhohtm1Brak
Genetic
Background
involves: 129/Sv * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Rhohtm1Brak mutation (0 available); any Rhoh mutation (13 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
• DN4 cells show increased apoptosis
• double and single positive T cells show increased apoptosis
• DN3 and DN4 proliferation is significantly reduced
• proliferation of single positive T cells is increased
• DN3 to DN4 transition is defective
• elevated in bone marrow and spleen at 2 months but not at 6 months
• T cell counts are greatly reduced in bone marrow, spleen, and lymph nodes at 2 months
• reduced 60% in thymus
• reduced 50% in bone marrow and spleen
• reduced 80% in thymus
• reduced 75% in bone marrow and spleen
• reduced 85% in thymus
• increased 2 fold in the thymus
• DN3 cells in the thymus are increased 3 fold while DN4 cell numbers are essentially normal
• DN3 cells are slightly elevated in the spleen and significantly elevated in lymph nodes
• elevated in bone marrow and spleen at 2 months but not at 6 months
• slightly elevated in the spleen and significantly elevated in lymph nodes
• about 60% lower cell numbers than controls at 2 months
• splenocyte counts are reduced at 2 months of age
• splenic monocyte counts are slightly elevated

hematopoietic system
• DN4 cells show increased apoptosis
• double and single positive T cells show increased apoptosis
• DN3 and DN4 proliferation is significantly reduced
• proliferation of single positive T cells is increased
• about 60% lower cell numbers than controls at 2 months
• DN3 to DN4 transition is defective
• elevated in bone marrow and spleen at 2 months but not at 6 months
• T cell counts are greatly reduced in bone marrow, spleen, and lymph nodes at 2 months
• reduced 60% in thymus
• reduced 50% in bone marrow and spleen
• reduced 80% in thymus
• reduced 75% in bone marrow and spleen
• reduced 85% in thymus
• increased 2 fold in the thymus
• DN3 cells in the thymus are increased 3 fold while DN4 cell numbers are essentially normal
• DN3 cells are slightly elevated in the spleen and significantly elevated in lymph nodes
• elevated in bone marrow and spleen at 2 months but not at 6 months
• slightly elevated in the spleen and significantly elevated in lymph nodes
• splenocyte counts are reduced at 2 months of age
• splenic monocyte counts are slightly elevated

cellular
• DN4 cells show increased apoptosis
• double and single positive T cells show increased apoptosis
• DN3 and DN4 proliferation is significantly reduced
• proliferation of single positive T cells is increased

endocrine/exocrine glands
• about 60% lower cell numbers than controls at 2 months




Genotype
MGI:3826459
cx2
Allelic
Composition
Rhohtm1Brak/Rhohtm1Brak
Itgb2tm2Bay/Itgb2tm2Bay
Genetic
Background
involves: 129/Sv * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Itgb2tm2Bay mutation (3 available); any Itgb2 mutation (50 available)
Rhohtm1Brak mutation (0 available); any Rhoh mutation (13 available)
phenotype observed in females
phenotype observed in males
N normal phenotype



Genotype
MGI:3826463
cx3
Allelic
Composition
Rhohtm1Brak/Rhohtm1Brak
Tg(TcraTcrb)425Cbn/?
Genetic
Background
involves: 129/Sv * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Rhohtm1Brak mutation (0 available); any Rhoh mutation (13 available)
Tg(TcraTcrb)425Cbn mutation (3 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
N
• no increase in DN4 cells observed
• severely impaired generation of CD4+ cells

hematopoietic system
• severely impaired generation of CD4+ cells





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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
10/29/2024
MGI 6.24
The Jackson Laboratory