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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Nras+
wild type
MGI:2431642
Summary 19 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
ht1
\Nrastm1b(EUCOMM)Hmgu/\Nras+ C57BL/6N-Nrastm1b(EUCOMM)Hmgu/H MGI:6263049
ht2
\Nrastm1.1Emfu/\Nras+ involves: 129S1/Sv * FVB/N MGI:5447946
cn3
\Nrastm1Tyj/\Nras+
\Meox2tm1(cre)Sor/\Meox2+
B6.Cg-Nrastm1Tyj Meox2tm1(cre)Sor MGI:7544840
cn4
\Nrastm1Tyj/\Nras+
\Tg(Tek-cre)1Ywa/0
B6.Cg-Nrastm1Tyj Tg(Tek-cre)1Ywa MGI:7544842
cn5
\Nrastm1Tyj/\Nras+
\Tg(Tnnt2-cre)5Blh/0
B6.Cg-Nrastm1Tyj Tg(Tnnt2-cre)5Blh MGI:7544844
cn6
\Ezh2tm1.1Nesh/\Ezh2+
\Nrastm1.1Nesh/\Nras+
\Tg(Tyr-cre/ERT2)13Bos/0
involves: 129 * 129P2/OlaHsd * C57BL/6 * FVB MGI:6393932
cn7
\Cdkn2atm2.1Nesh/\Cdkn2atm2.1Nesh
\Nrastm1.1Nesh/\Nras+
\Tg(Tyr-cre/ERT2)13Bos/0
involves: 129 * 129S4/SvJae * 129P2/OlaHsd * C57BL/6 * FVB MGI:6393936
cn8
\Cdkn2atm2.1Nesh/\Cdkn2atm2.1Nesh
\Ezh2tm1.1Nesh/\Ezh2+
\Nrastm1.1Nesh/\Nras+
\Tg(Tyr-cre/ERT2)13Bos/0
involves: 129 * 129S4/SvJae * 129P2/OlaHsd * C57BL/6 * FVB MGI:6393935
cn9
\Nrastm1Tyj/\Nras+
\Meox2tm1(cre)Sor/\Meox2+
involves: 129S4/SvJaeSor * C57BL/6 MGI:5284833
cn10
\Nrastm1Tyj/\Nras+
\Tg(Tyr-cre/ERT2)1Lru/0
involves: C57BL/6 * DBA/2 MGI:5755095
cn11
\Nrastm1Tyj/\Nras+
\Tg(Vil1-cre)20Syr/0
involves: C57BL/6 * DBA/2 MGI:3776027
cn12
\Nrastm1Tyj/\Nras+
\Tg(Tyr-cre)1Lru/0
involves: C57BL/6 * DBA/2 MGI:5755101
cn13
\Nrastm1Tyj/\Nras+
\Tg(Fabp1-cre)1Jig/0
involves: C57BL/6 * FVB/N MGI:3776024
cx14
\Krastm1Mok/\Kras+
\Nrastm1Mok/\Nras+
B6.129S-Nrastm1Mok Krastm1Mok MGI:4821324
cx15
\Hrastm1Mok/\Hrastm1Mok
\Krastm1Mok/\Kras+
\Nrastm1Mok/\Nras+
\Tg(HRAS)2Jic/0
involves: 129S/SvEv * BALB/c * C57BL/6 * DBA/2 MGI:4821330
cx16
\Hrastm1Mok/\Hrastm1Mok
\Nrastm1Mok/\Nras+
involves: 129S/SvEv * C57BL/6 * DBA/2 MGI:4821328
cx17
\Hrastm1Mok/\Hrastm1Mok
\Krastm1Mok/\Kras+
\Nrastm1Mok/\Nras+
involves: 129S/SvEv * C57BL/6 * DBA/2 MGI:4821329
cx18
\Krastm1Mok/\Kras+
\Nrastm1Mok/\Nras+
involves: 129S/SvEv * C57BL/6 * DBA/2 MGI:4821323
cx19
\Krastm1Tyj/\Krastm1Tyj
\Nrastm1Rak/\Nras+
involves: 129/Sv * C57BL/6 MGI:3589358


Genotype
MGI:6263049
ht1
Allelic
Composition
\Nrastm1b(EUCOMM)Hmgu/\Nras+
Genetic
Background
C57BL/6N-Nrastm1b(EUCOMM)Hmgu/H
Cell Lines HEPD0719_5_C04
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Nrastm1b(EUCOMM)Hmgu mutation (0 available); any Nras mutation (42 available)
Data Sources
phenotype observed in females
phenotype observed in males
N normal phenotype
homeostasis/metabolism

limbs/digits/tail
IMPC - HAR

skeleton
IMPC - HAR




Genotype
MGI:5447946
ht2
Allelic
Composition
\Nrastm1.1Emfu/\Nras+
Genetic
Background
involves: 129S1/Sv * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Nrastm1.1Emfu mutation (0 available); any Nras mutation (42 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
growth/size/body
• transient reduction in body weight in some mice, which is compensated before adulthood




Genotype
MGI:7544840
cn3
Allelic
Composition
\Nrastm1Tyj/\Nras+
\Meox2tm1(cre)Sor/\Meox2+
Genetic
Background
B6.Cg-Nrastm1Tyj Meox2tm1(cre)Sor
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Meox2tm1(cre)Sor mutation (3 available); any Meox2 mutation (18 available)
Nrastm1Tyj mutation (1 available); any Nras mutation (42 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• embryos are recovered at normal numbers at E12.5-E14.5; however, all embryos die between E15.5 and E17.5

growth/size/body
• at E15.5, embryos are smaller than control embryos
• however, embryos are grossly normal at E13.5

integument
• embryos exhibit pale bodies at E15.5

homeostasis/metabolism
• at E15.5, embryos display whole-body edema

cardiovascular system
• starting at E13.5, hearts show morphological defects that resemble congenital cardiac defects seen in Noonan syndrome patients
• at E13.5, hearts exhibit myocardial hypertrabeculation
• at E13.5, the compact layer thickness in the right and left heart ventricle is reduced by 62.5 and 45.5%, respectively
• at E13.5, 4 of 6 hearts exhibit a thin myocardium
• at E13.5, hearts exhibit downregulated non-canonical Wnt and BMP pathways and hyperactivated MEK/ERK signaling, indicating dysregulation of critical pathways involved in heart development
• however, no alterations in cell proliferation or apoptosis are observed in the heart at E13.5
• pulmonary valves are not remodeled properly
• at E13.5, 4 of 6 hearts exhibit a DORV phenotype, where both the aorta and pulmonary trunk exit the right ventricle
• at E13.5, all (6 of 6) hearts show ventricular septal defects (VSDs); the interventricular septum fails to fuse with the endocardial cushion, unlike in control hearts
• at E13.5, 4 of 6 hearts exhibit pulmonary valve stenosis

liver/biliary system
• fetal livers are smaller at E15.5
• at E15.5, hepatic necrosis is observed, esp. in the regions distal from blood flow

hematopoietic system
• fetal liver hematopoiesis is mildly perturbed at E13.5
• at E13.5, fetal livers show a moderate expansion of Ter119- CD71mid/hi cells that are enriched with colony forming unit-erythroid (CFU-E) progenitors and early erythroblasts
• however, the % of terminally differentiating Ter119+ erythroid cells is similar to that of controls
• at E13.5, embryos show a moderate expansion of hematopoietic stem and progenitor cells in the fetal liver
• at E13.5, embryos show a moderate expansion of hematopoietic stem and progenitor cells in the fetal liver; both HSCs (defined as Lin- Mac1+ CD41- CD48- CD150+ Sca1+ cKit+) and LSK cells (hematopoietic stem and progenitor cells, defined as Lin- Sca1+ cKit+) are expanded

muscle
• at E13.5, hearts exhibit myocardial hypertrabeculation
• at E13.5, the compact layer thickness in the right and left heart ventricle is reduced by 62.5 and 45.5%, respectively
• at E13.5, 4 of 6 hearts exhibit a thin myocardium




Genotype
MGI:7544842
cn4
Allelic
Composition
\Nrastm1Tyj/\Nras+
\Tg(Tek-cre)1Ywa/0
Genetic
Background
B6.Cg-Nrastm1Tyj Tg(Tek-cre)1Ywa
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Nrastm1Tyj mutation (1 available); any Nras mutation (42 available)
Tg(Tek-cre)1Ywa mutation (7 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• live embryos are recovered at normal numbers at E14.5; however, all embryos die by E17.5

cardiovascular system
• at E13.5, three of 5 hearts exhibit myocardial hypertrabeculation
• at E13.5, three of 5 hearts exhibit a thin compact layer with a deeply invaginated trabecular layer
• at E13.5, two of 5 hearts exhibit DORV
• at E13.5, two of 5 hearts show ventricular septal defects (VSDs)
• at E13.5, two of 5 hearts exhibit pulmonary valve stenosis

muscle
• at E13.5, three of 5 hearts exhibit myocardial hypertrabeculation
• at E13.5, three of 5 hearts exhibit a thin compact layer with a deeply invaginated trabecular layer




Genotype
MGI:7544844
cn5
Allelic
Composition
\Nrastm1Tyj/\Nras+
\Tg(Tnnt2-cre)5Blh/0
Genetic
Background
B6.Cg-Nrastm1Tyj Tg(Tnnt2-cre)5Blh
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Nrastm1Tyj mutation (1 available); any Nras mutation (42 available)
Tg(Tnnt2-cre)5Blh mutation (1 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
N
• mice exhibit normal viability during embryonic development

cardiovascular system
N
• mice do NOT exhibit any gross cardiac malformations during embryonic development




Genotype
MGI:6393932
cn6
Allelic
Composition
\Ezh2tm1.1Nesh/\Ezh2+
\Nrastm1.1Nesh/\Nras+
\Tg(Tyr-cre/ERT2)13Bos/0
Genetic
Background
involves: 129 * 129P2/OlaHsd * C57BL/6 * FVB
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ezh2tm1.1Nesh mutation (1 available); any Ezh2 mutation (70 available)
Nrastm1.1Nesh mutation (2 available); any Nras mutation (42 available)
Tg(Tyr-cre/ERT2)13Bos mutation (12 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
N
• tamoxifen-treated mice do not show acceleration of melanomagenesis and do not form melanoma compared to single Nras conditional mutants




Genotype
MGI:6393936
cn7
Allelic
Composition
\Cdkn2atm2.1Nesh/\Cdkn2atm2.1Nesh
\Nrastm1.1Nesh/\Nras+
\Tg(Tyr-cre/ERT2)13Bos/0
Genetic
Background
involves: 129 * 129S4/SvJae * 129P2/OlaHsd * C57BL/6 * FVB
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdkn2atm2.1Nesh mutation (4 available); any Cdkn2a mutation (66 available)
Nrastm1.1Nesh mutation (2 available); any Nras mutation (42 available)
Tg(Tyr-cre/ERT2)13Bos mutation (12 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• tamoxifen-treated mice develop melanoma




Genotype
MGI:6393935
cn8
Allelic
Composition
\Cdkn2atm2.1Nesh/\Cdkn2atm2.1Nesh
\Ezh2tm1.1Nesh/\Ezh2+
\Nrastm1.1Nesh/\Nras+
\Tg(Tyr-cre/ERT2)13Bos/0
Genetic
Background
involves: 129 * 129S4/SvJae * 129P2/OlaHsd * C57BL/6 * FVB
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdkn2atm2.1Nesh mutation (4 available); any Cdkn2a mutation (66 available)
Ezh2tm1.1Nesh mutation (1 available); any Ezh2 mutation (70 available)
Nrastm1.1Nesh mutation (2 available); any Nras mutation (42 available)
Tg(Tyr-cre/ERT2)13Bos mutation (12 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• tamoxifen-treated mice develop melanoma similarly to conditional Nras and Cdkn2a double mutants




Genotype
MGI:5284833
cn9
Allelic
Composition
\Nrastm1Tyj/\Nras+
\Meox2tm1(cre)Sor/\Meox2+
Genetic
Background
involves: 129S4/SvJaeSor * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Meox2tm1(cre)Sor mutation (3 available); any Meox2 mutation (18 available)
Nrastm1Tyj mutation (1 available); any Nras mutation (42 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging




Genotype
MGI:5755095
cn10
Allelic
Composition
\Nrastm1Tyj/\Nras+
\Tg(Tyr-cre/ERT2)1Lru/0
Genetic
Background
involves: C57BL/6 * DBA/2
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Nrastm1Tyj mutation (1 available); any Nras mutation (42 available)
Tg(Tyr-cre/ERT2)1Lru mutation (1 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
integument
• mice painted with tamoxifen on to shaven back skin develop small paucicelluar nevi in the deep dermal and periadnexal regions of the skin

pigmentation
• 50% of mice painted with tamoxifen on to shaven back skin at about 2 months of age exhibit weak darkening of the skin within 4 to 8 months




Genotype
MGI:3776027
cn11
Allelic
Composition
\Nrastm1Tyj/\Nras+
\Tg(Vil1-cre)20Syr/0
Genetic
Background
involves: C57BL/6 * DBA/2
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Nrastm1Tyj mutation (1 available); any Nras mutation (42 available)
Tg(Vil1-cre)20Syr mutation (4 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
homeostasis/metabolism
• one week after exposure to 2.5% dextran sodium sulfate (DSS), colonic epithelium shows high resistance to the effects relative to wild-type and Kras mutant animals; sensitivity to DSS-induced apoptosis is strongly reduced




Genotype
MGI:5755101
cn12
Allelic
Composition
\Nrastm1Tyj/\Nras+
\Tg(Tyr-cre)1Lru/0
Genetic
Background
involves: C57BL/6 * DBA/2
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Nrastm1Tyj mutation (1 available); any Nras mutation (42 available)
Tg(Tyr-cre)1Lru mutation (1 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• progress to akathisia and general malaise
• at a median age of 12.5 months
• seen at a median age of 12.5 months
• mice exhibit incoordination at a median age of 12.5 months
• mice show impaired gait at a median age of 12.5 months

skeleton
• most mice develop increasing cranial perimeter or cranial deformity symptoms

mortality/aging
• mice begin to die around 6 months of age with about 25% surviving past 18 months of age

craniofacial
• most mice develop increasing cranial perimeter or cranial deformity symptoms

pigmentation
• darkening of the skin, tails, paws, and snouts that is evident from day 1 and persists throughout life, that is less pronounced than that in homozygotes




Genotype
MGI:3776024
cn13
Allelic
Composition
\Nrastm1Tyj/\Nras+
\Tg(Fabp1-cre)1Jig/0
Genetic
Background
involves: C57BL/6 * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Nrastm1Tyj mutation (1 available); any Nras mutation (42 available)
Tg(Fabp1-cre)1Jig mutation (2 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
digestive/alimentary system
N
• expression of mutant Nras appears to have no effect on the histology of the colonic epithelium




Genotype
MGI:4821324
cx14
Allelic
Composition
\Krastm1Mok/\Kras+
\Nrastm1Mok/\Nras+
Genetic
Background
B6.129S-Nrastm1Mok Krastm1Mok
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Krastm1Mok mutation (6 available); any Kras mutation (88 available)
Nrastm1Mok mutation (7 available); any Nras mutation (42 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
homeostasis/metabolism
• 19 of 26 mice develop chylous ascites unlike wild-type mice




Genotype
MGI:4821330
cx15
Allelic
Composition
\Hrastm1Mok/\Hrastm1Mok
\Krastm1Mok/\Kras+
\Nrastm1Mok/\Nras+
\Tg(HRAS)2Jic/0
Genetic
Background
involves: 129S/SvEv * BALB/c * C57BL/6 * DBA/2
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Hrastm1Mok mutation (15 available); any Hras mutation (30 available)
Krastm1Mok mutation (6 available); any Kras mutation (88 available)
Nrastm1Mok mutation (7 available); any Nras mutation (42 available)
Tg(HRAS)2Jic mutation (7 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
homeostasis/metabolism
N
• no mice exhibit chylous ascites




Genotype
MGI:4821328
cx16
Allelic
Composition
\Hrastm1Mok/\Hrastm1Mok
\Nrastm1Mok/\Nras+
Genetic
Background
involves: 129S/SvEv * C57BL/6 * DBA/2
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Hrastm1Mok mutation (15 available); any Hras mutation (30 available)
Nrastm1Mok mutation (7 available); any Nras mutation (42 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
homeostasis/metabolism
• 2 of 175 mice develop chylous ascites unlike wild-type mice




Genotype
MGI:4821329
cx17
Allelic
Composition
\Hrastm1Mok/\Hrastm1Mok
\Krastm1Mok/\Kras+
\Nrastm1Mok/\Nras+
Genetic
Background
involves: 129S/SvEv * C57BL/6 * DBA/2
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Hrastm1Mok mutation (15 available); any Hras mutation (30 available)
Krastm1Mok mutation (6 available); any Kras mutation (88 available)
Nrastm1Mok mutation (7 available); any Nras mutation (42 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
homeostasis/metabolism
• 35 of 37 mice develop chylous ascites unlike wild-type mice




Genotype
MGI:4821323
cx18
Allelic
Composition
\Krastm1Mok/\Kras+
\Nrastm1Mok/\Nras+
Genetic
Background
involves: 129S/SvEv * C57BL/6 * DBA/2
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Krastm1Mok mutation (6 available); any Kras mutation (88 available)
Nrastm1Mok mutation (7 available); any Nras mutation (42 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
homeostasis/metabolism
• 5 of 76 mice develop chylous ascites unlike wild-type mice

immune system
• in the small intestine




Genotype
MGI:3589358
cx19
Allelic
Composition
\Krastm1Tyj/\Krastm1Tyj
\Nrastm1Rak/\Nras+
Genetic
Background
involves: 129/Sv * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Krastm1Tyj mutation (1 available); any Kras mutation (88 available)
Nrastm1Rak mutation (1 available); any Nras mutation (42 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• ~40% of mutant embryos are found dead at E9.5





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last database update
03/25/2025
MGI 6.24
The Jackson Laboratory