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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Fancatm1Faw
targeted mutation 1, Fre Arwert
MGI:2183470
Summary 3 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Fancatm1Faw/Fancatm1Faw involves: 129P2/OlaHsd * FVB MGI:3618892
hm2
Fancatm1Faw/Fancatm1Faw involves: 129P2/OlaHsd * FVB/N MGI:3833152
ht3
Fancatm1Faw/Fanca+ involves: 129P2/OlaHsd * FVB MGI:3618916


Genotype
MGI:3618892
hm1
Allelic
Composition
Fancatm1Faw/Fancatm1Faw
Genetic
Background
involves: 129P2/OlaHsd * FVB
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fancatm1Faw mutation (0 available); any Fanca mutation (81 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
reproductive system
• mutant ovaries consist predominantly of interstitial cells
• mutant ovaries contain few or almost no mature follicles
• male homozygotes display atrophic seminiferous tubules with significantly reduced spermatogenesis; some tubuli mainly have Sertoli cells
• mutant testes display diffuse hyperplasia of Leydig cells
• mutant testes exhibit seminiferous tubules with normal spermatogenesis next to abnormal tubules with markedly reduced spermatogenesis
• both male and female homozygotes exhibit hypogonadism
• female homozygotes cease breeding between 10 and 21 weeks of age
• male homozygotes stop breeding after ~20 weeks of age, with the majority becoming completely infertile
• occasionally, some males regain reproductivity after a non-reproductive period of several months

endocrine/exocrine glands
• mutant ovaries consist predominantly of interstitial cells
• mutant ovaries contain few or almost no mature follicles
• male homozygotes display atrophic seminiferous tubules with significantly reduced spermatogenesis; some tubuli mainly have Sertoli cells
• mutant testes display diffuse hyperplasia of Leydig cells

hematopoietic system
• at ~20 weeks of age, homozygotes display a slight increase in mean cell volume, suggestive of macrocytic red cells
• however, all other hematological parameters, including total erythrocyte counts and hemoglobin levels, remain normal and no progression to anemia is observed up to 1 year
• attempts to stress the hematopoietic system by splenectomy do not result in anemia or reduced blood cell counts
• at ~20 weeks of age, homozygotes show a slight reduction in platelet count; however, no further decrease is noted over time

cellular
• homozygous mutant MEFs are hyper-responsive to the clastogenic effect of the crosslinker mitomycin C, with most cells containing >10 aberrations after treatment
• homozygous mutant MEFs exhibit increased spontaneous chromosomal instability, with 22% of cells exhibiting aberrations vs 4% of wild-type MEFs

skeleton
N
• homozygotes display no skeletal abnormalities, as shown by radiology

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
Fanconi anemia complementation group A DOID:0111095 OMIM:227650
J:63742




Genotype
MGI:3833152
hm2
Allelic
Composition
Fancatm1Faw/Fancatm1Faw
Genetic
Background
involves: 129P2/OlaHsd * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fancatm1Faw mutation (0 available); any Fanca mutation (81 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cellular
• bone marrow cells exposed to 30 nM mitomycin C exhibit more chromatid breaks that similarly treated wild-type cells
• however, spontaneous chromatid breakage is normal




Genotype
MGI:3618916
ht3
Allelic
Composition
Fancatm1Faw/Fanca+
Genetic
Background
involves: 129P2/OlaHsd * FVB
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fancatm1Faw mutation (0 available); any Fanca mutation (81 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cellular
• in response to treatment with crosslinker mitomycin C, heterozygous mutant MEFs display an intermediate level of chromosomal aberrations relative to homozygous mutant MEFs





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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
04/30/2024
MGI 6.23
The Jackson Laboratory