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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Actb+
wild type
MGI:2438953
Summary 11 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
ht1
Actbtm3.1(Sirt1)Npa/Actb+ involves: 129/Sv * C57BL/6 * C57BL/6J MGI:4456085
ht2
Actbtm1(PyVT)Arge/Actb+ involves: 129S1/Sv MGI:3032630
ht3
Actbtm2(Tag)Arge/Actb+ involves: 129S1/Sv MGI:3032633
ht4
Actbtm2Npa/Actb+ involves: BALB/c MGI:3769440
ht5
Actbtm1Npa/Actb+ involves: BALB/cJ MGI:3770049
cn6
Actbtm1(PyVT)Arge/Actb+
Waptm1(cre)Arge/Wap+
involves: 129S1/Sv MGI:3032632
cn7
Actbtm2(Tag)Arge/Actb+
Tg(Hsp70-1-cre)1Arge/0
involves: 129S1/Sv * C57BL/6J * CBA MGI:3032629
cn8
Actbtm1(PyVT)Arge/Actb+
Tg(Hsp70-1-cre)1Arge/0
involves: 129S1/Sv * C57BL/6J * CBA MGI:3032631
cn9
Actbtm4(cre/ERT2)Npa/Actb+
Sgpl1tm1.1Npa/Sgpl1tm1.1Npa
involves: BALB/cJ * C57BL/6 MGI:5515215
cx10
Actbtm1.1(tetO-COP4*/EYFP)Kftnk/Actb+
Tg(Mlc1-tTA)2Rhn/0
involves: 129 * 129S4/SvJaeSor * C57BL/6 * CBA MGI:5439338
cx11
Actbtm3.1(Sirt1)Npa/Actb+
Sirt1tm1Mcby/Sirt1tm1Mcby
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * C57BL/6J MGI:4456088


Genotype
MGI:4456085
ht1
Allelic
Composition
Actbtm3.1(Sirt1)Npa/Actb+
Genetic
Background
involves: 129/Sv * C57BL/6 * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Actbtm3.1(Sirt1)Npa mutation (1 available); any Actb mutation (52 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• fewer than expected mice are produced (no time of death given)

reproductive system

homeostasis/metabolism
N
• mice exhibit normal levels of circulating triglyceride, glycerol, IGF, IGF-1, lactate, hydrobutyrate, and corticosterone
• reduced plasma glucose levels in fasted mice at 6 months of age
• reduced plasma insulin levels in fed mice at 6 months of age
• at 3 and 12 months
• at 7 months of age

behavior/neurological
N
• mice exhibit normal baseline physical activity
• increase in food consumption normalized to body weight
• mice exhibit improved performance on a rotarod compared with wild-type mice

growth/size/body

adipose tissue




Genotype
MGI:3032630
ht2
Allelic
Composition
Actbtm1(PyVT)Arge/Actb+
Genetic
Background
involves: 129S1/Sv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Actbtm1(PyVT)Arge mutation (0 available); any Actb mutation (52 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging

neoplasm
• some post-partum females developed tumors as a result of cre-independent excision of the floxed neo cassette
• lung metastases were observed in some cases
• associated with cre-independent excision of the floxed neomycin cassette

integument
• some post-partum females developed tumors as a result of cre-independent excision of the floxed neo cassette
• lung metastases were observed in some cases

endocrine/exocrine glands
• some post-partum females developed tumors as a result of cre-independent excision of the floxed neo cassette
• lung metastases were observed in some cases




Genotype
MGI:3032633
ht3
Allelic
Composition
Actbtm2(Tag)Arge/Actb+
Genetic
Background
involves: 129S1/Sv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Actbtm2(Tag)Arge mutation (0 available); any Actb mutation (52 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• some females developed tumors as a result of cre-independent excision of the floxed neo cassette




Genotype
MGI:3769440
ht4
Allelic
Composition
Actbtm2Npa/Actb+
Genetic
Background
involves: BALB/c
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Actbtm2Npa mutation (0 available); any Actb mutation (52 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
growth/size/body
• mice are smaller than their wild-type counterparts




Genotype
MGI:3770049
ht5
Allelic
Composition
Actbtm1Npa/Actb+
Genetic
Background
involves: BALB/cJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Actbtm1Npa mutation (0 available); any Actb mutation (52 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
growth/size/body
• adults have 10% lower body weight




Genotype
MGI:3032632
cn6
Allelic
Composition
Actbtm1(PyVT)Arge/Actb+
Waptm1(cre)Arge/Wap+
Genetic
Background
involves: 129S1/Sv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Actbtm1(PyVT)Arge mutation (0 available); any Actb mutation (52 available)
Waptm1(cre)Arge mutation (0 available); any Wap mutation (33 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• premature death

neoplasm

cardiovascular system
• exhibited by 70% of females (mostly virgins, indicating that this phenotype is associated with cre-independent excision of the floxed neomycin cassette)

muscle
• exhibited by 70% of females (mostly virgins, indicating that this phenotype is associated with cre-independent excision of the floxed neomycin cassette)

integument

endocrine/exocrine glands




Genotype
MGI:3032629
cn7
Allelic
Composition
Actbtm2(Tag)Arge/Actb+
Tg(Hsp70-1-cre)1Arge/0
Genetic
Background
involves: 129S1/Sv * C57BL/6J * CBA
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Actbtm2(Tag)Arge mutation (0 available); any Actb mutation (52 available)
Tg(Hsp70-1-cre)1Arge mutation (1 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• females exhibited uterine leiomyosacromas around 3 months of age

endocrine/exocrine glands
• enlarged due to pronounced hyperplasia of smooth muscle layers
• marked dilation in both males and females due to smooth muscle proliferation

liver/biliary system
• marked dilation in both males and females due to smooth muscle proliferation

muscle
• smooth muscle hyperproliferation in both males and females
• females exhibited uterine leiomyosacromas around 3 months of age

reproductive system
• enlarged due to pronounced hyperplasia of smooth muscle layers
• development of leiomyosarcomas in the uterus

growth/size/body
• marked dilation in both males and females due to smooth muscle proliferation




Genotype
MGI:3032631
cn8
Allelic
Composition
Actbtm1(PyVT)Arge/Actb+
Tg(Hsp70-1-cre)1Arge/0
Genetic
Background
involves: 129S1/Sv * C57BL/6J * CBA
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Actbtm1(PyVT)Arge mutation (0 available); any Actb mutation (52 available)
Tg(Hsp70-1-cre)1Arge mutation (1 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging




Genotype
MGI:5515215
cn9
Allelic
Composition
Actbtm4(cre/ERT2)Npa/Actb+
Sgpl1tm1.1Npa/Sgpl1tm1.1Npa
Genetic
Background
involves: BALB/cJ * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Actbtm4(cre/ERT2)Npa mutation (0 available); any Actb mutation (52 available)
Sgpl1tm1.1Npa mutation (0 available); any Sgpl1 mutation (33 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
N
• with tamoxifen treatment mice show normal survival up to 6 months of observation

growth/size/body
N
• after tamoxifen treatment mice show normal weight gain up to 6 months of observation

hematopoietic system
• thymocytes are enriched in mature single-positive T cells
• with tamoxifen treatment total numbers are decreased significantly, with no significant change in germinal center B cells
• with tamoxifen treatment total numbers are decreased significantly, with no significant change in germinal center B cells
• with tamoxifen treatment numbers of CD4+Foxp3+ T cells are reduced 3-4 fold in spleen and increased more than 4-fold in lymph nodes with tamoxifen treatment
• mice treated with tamoxifen daily for 5 days have decreases in CD4- and CD8-positive T cells by up to 85% two weeks later, lasting for at least 6 months; CD19-positive B cell numbers are unchanged
• at 8 weeks after tamoxifen treatment, splenic populations of CD4- and CD8-positive T cells are sharply reduced
• at 8 weeks after tamoxifen treatment splenic cellularity sharply decreased with significant reductions in CD- and CD8-positive T cells and subpopulations of B cells

immune system
• thymocytes are enriched in mature single-positive T cells
• with tamoxifen treatment total numbers are decreased significantly, with no significant change in germinal center B cells
• with tamoxifen treatment total numbers are decreased significantly, with no significant change in germinal center B cells
• with tamoxifen treatment numbers of CD4+Foxp3+ T cells are reduced 3-4 fold in spleen and increased more than 4-fold in lymph nodes with tamoxifen treatment
• mice treated with tamoxifen daily for 5 days have decreases in CD4- and CD8-positive T cells by up to 85% two weeks later, lasting for at least 6 months; CD19-positive B cell numbers are unchanged
• at 8 weeks after tamoxifen treatment, splenic populations of CD4- and CD8-positive T cells are sharply reduced
• at 8 weeks after tamoxifen treatment splenic cellularity sharply decreased with significant reductions in CD- and CD8-positive T cells and subpopulations of B cells
• with tamoxifen treatment lymph node cell numbers are significantly increased with an increase in CD4- and CD8-positive T cells and total B cell numbers (except germinal center B cells
• tamoxifen treated mice are protected from delayed-type hypersensitivity reaction induced by localized challenge with sheep red blood cells
• tamoxifen treated mice are almost completely protected from MOG-induced EAE

homeostasis/metabolism
• 2 weeks after induction of cre, levels of S1P (Sgpl1 substrate) are increased 4-fold (heart) to 100-fold (spleen/lymph nodes) with no significant increase in the brain or spinal cord; blood concentrations are elevate only 1.6-fold
• ceramide (S1P precursor) is not significantly elevated with Sph (S1P precursor) increased 16-fold
• increase of sphingolipid metabolites is much less pronounce than in constitutive Sgpl1 knockouts

endocrine/exocrine glands
• thymocytes are enriched in mature single-positive T cells




Genotype
MGI:5439338
cx10
Allelic
Composition
Actbtm1.1(tetO-COP4*/EYFP)Kftnk/Actb+
Tg(Mlc1-tTA)2Rhn/0
Genetic
Background
involves: 129 * 129S4/SvJaeSor * C57BL/6 * CBA
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Actbtm1.1(tetO-COP4*/EYFP)Kftnk mutation (1 available); any Actb mutation (52 available)
Tg(Mlc1-tTA)2Rhn mutation (1 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• photostimulated astrocytes release glutamate
• photostimulated astrocytes release glutamate, which is sufficient to activate AMPA receptors on neighboring Purkinje cells and to induce long-term depression of parallel fiber-to-Purkinje cell synapses through activation of metabotropic glutamate receptors
• neuronal activation by glial stimulation can lead to perturbation of cerebellar modulated motor behavior

cellular
• photostimulated astrocytes release glutamate




Genotype
MGI:4456088
cx11
Allelic
Composition
Actbtm3.1(Sirt1)Npa/Actb+
Sirt1tm1Mcby/Sirt1tm1Mcby
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * C57BL/6 * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Actbtm3.1(Sirt1)Npa mutation (1 available); any Actb mutation (52 available)
Sirt1tm1Mcby mutation (2 available); any Sirt1 mutation (81 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
reproductive system
N
• unlike Sirt1tm1Mcby homozygotes, mice are fertile

growth/size/body
N
• unlike Sirt1tm1Mcby homozygotes, mice exhibit normal body size and weight

vision/eye
N
• unlike Sirt1tm1Mcby homozygotes, eyelids open





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