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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc
targeted mutation 4, Mario R Capecchi
MGI:5495288
Summary 11 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
cn1
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+ involves: C57BL/6 MGI:5495300
cn2
Gt(ROSA)26Sortm1(cre/ERT)Nat/Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc involves: 129S1/Sv * 129X1/SvJ * C57BL/6 MGI:5495301
cn3
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Bmi1tm1(cre/ERT)Mrc/Bmi1+
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 MGI:5495321
cn4
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Pax7tm1(cre)Mrc/Pax7+
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 MGI:5495314
cn5
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Myf5tm1(cre)Mrc/Myf5+
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 MGI:5495318
cn6
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Pax7tm1(cre/ERT2)Gaka/Pax7+
involves: 129S6/SvEvTac * C57BL/6 MGI:5495319
cn7
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Pax3tm1(cre)Joe/Pax3+
involves: C57BL/6 MGI:5495303
cn8
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Tg(Prrx1-cre/ERT2)1Mlgn/?
involves: C57BL/6 MGI:5495320
cn9
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
H2az2Tg(Wnt1-cre)11Rth/H2az2+
involves: C57BL/6J * CBA/J MGI:5495316
cn10
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Tg(Prrx1-cre)1Cjt/?
involves: C57BL/6 * SJL MGI:5495317
cn11
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Tg(Tek-cre)1Ywa/?
involves: C57BL/6 * SJL MGI:5495315


Genotype
MGI:5495300
cn1
Allelic
Composition
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Genetic
Background
involves: C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc mutation (0 available); any Gt(ROSA)26Sor mutation (993 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• injection of TAT-cre results in tumors at the injection site as well as EGFP expression
• match human clear cell sarcoma tumor histomorphology and immunochemistry
• open chromatin and clear cytoplasm
• rapid tumor growth after visible detection regardless of latency
• latency of tumor formation correlated with TAT-cre concentration

homeostasis/metabolism
• injection of TAT-cre results in tumors at the injection site as well as EGFP expression




Genotype
MGI:5495301
cn2
Allelic
Composition
Gt(ROSA)26Sortm1(cre/ERT)Nat/Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gt(ROSA)26Sortm1(cre/ERT)Nat mutation (2 available); any Gt(ROSA)26Sor mutation (993 available)
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc mutation (0 available); any Gt(ROSA)26Sor mutation (993 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
reproductive system

growth/size/body
• administration of tamoxifen prior to 3 weeks of age results in stunted growth

mortality/aging
• administration of tamoxifen prior to 3 weeks of age results in death by 12 weeks of age without tumor formation

neoplasm
• when tamoxifen is administered after 3 weeks of age more tumors form than without tamoxifen
• tumors most often in extremities, rib cage, and facial tissue
• tumors rare in dermis, liver, and bone
• mice develop clear cell sarcoma mimicking tumors across a broad anatomic distribution at 3-6 months of age in the absence of tamoxifen, indicating leakiness of the cre transgene
• all mice have tumors by 12 weeks regardless of treatment




Genotype
MGI:5495321
cn3
Allelic
Composition
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Bmi1tm1(cre/ERT)Mrc/Bmi1+
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Bmi1tm1(cre/ERT)Mrc mutation (2 available); any Bmi1 mutation (31 available)
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc mutation (0 available); any Gt(ROSA)26Sor mutation (993 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• fully penetrant tumorigenesis when tamoxifen is injected after 3 weeks of age
• tumors in deep mesenchymal tissues of the limbs and trunk
• most tumors form adjacent to bone but some are totally in muscle
• all tumors with "clear cell" morphology




Genotype
MGI:5495314
cn4
Allelic
Composition
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Pax7tm1(cre)Mrc/Pax7+
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc mutation (0 available); any Gt(ROSA)26Sor mutation (993 available)
Pax7tm1(cre)Mrc mutation (2 available); any Pax7 mutation (38 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging

craniofacial
• severe craniofacial deformation




Genotype
MGI:5495318
cn5
Allelic
Composition
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Myf5tm1(cre)Mrc/Myf5+
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc mutation (0 available); any Gt(ROSA)26Sor mutation (993 available)
Myf5tm1(cre)Mrc mutation (1 available); any Myf5 mutation (17 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• live to 3 months

growth/size/body
• mice are very small

muscle
• severely myopathic




Genotype
MGI:5495319
cn6
Allelic
Composition
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Pax7tm1(cre/ERT2)Gaka/Pax7+
Genetic
Background
involves: 129S6/SvEvTac * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc mutation (0 available); any Gt(ROSA)26Sor mutation (993 available)
Pax7tm1(cre/ERT2)Gaka mutation (1 available); any Pax7 mutation (38 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
muscle
• when tamoxifen is administered after 3 weeks of age myopathy develops by 12 months

neoplasm
N
• no abnormal tumor development when treated with tamoxifen after 3 weeks of age




Genotype
MGI:5495303
cn7
Allelic
Composition
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Pax3tm1(cre)Joe/Pax3+
Genetic
Background
involves: C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc mutation (0 available); any Gt(ROSA)26Sor mutation (993 available)
Pax3tm1(cre)Joe mutation (1 available); any Pax3 mutation (50 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging




Genotype
MGI:5495320
cn8
Allelic
Composition
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Tg(Prrx1-cre/ERT2)1Mlgn/?
Genetic
Background
involves: C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc mutation (0 available); any Gt(ROSA)26Sor mutation (993 available)
Tg(Prrx1-cre/ERT2)1Mlgn mutation (0 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
muscle
• when tamoxifen is administered after 3 weeks of age myopathy develops by 12 months

neoplasm
• when tamoxifen is administered after 3 weeks of age tumors develop in the extremities of 100% of mice by 8 weeks of age
• tumors arise from the periosteal/perichondrial layer as well as within musculature
• clear cell morphology or spindle cell morphology




Genotype
MGI:5495316
cn9
Allelic
Composition
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
H2az2Tg(Wnt1-cre)11Rth/H2az2+
Genetic
Background
involves: C57BL/6J * CBA/J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc mutation (0 available); any Gt(ROSA)26Sor mutation (993 available)
H2az2Tg(Wnt1-cre)11Rth mutation (2 available); any H2az2 mutation (26 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging




Genotype
MGI:5495317
cn10
Allelic
Composition
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Tg(Prrx1-cre)1Cjt/?
Genetic
Background
involves: C57BL/6 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc mutation (0 available); any Gt(ROSA)26Sor mutation (993 available)
Tg(Prrx1-cre)1Cjt mutation (2 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• embryos are viable at E14.5 but with severe limb deformities

limbs/digits/tail
• severe limb deformities at E14.5




Genotype
MGI:5495315
cn11
Allelic
Composition
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc/Gt(ROSA)26Sor+
Tg(Tek-cre)1Ywa/?
Genetic
Background
involves: C57BL/6 * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gt(ROSA)26Sortm4(EWSR1/ATF1)Mrc mutation (0 available); any Gt(ROSA)26Sor mutation (993 available)
Tg(Tek-cre)1Ywa mutation (6 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging





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last database update
11/12/2024
MGI 6.24
The Jackson Laboratory