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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Pik3r4mbe
marble
MGI:6324670
Summary 3 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Pik3r4mbe/Pik3r4mbe involves: C3H/HeH * C57BL/6 MGI:6331072
cn2
Neurod6tm1(cre)Kan/Neurod6+
Pik3r4mbe/Pik3r4tm1.1Mpnd
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * C3H/HeH * C57BL/6 MGI:6331081
cn3
Pik3r4mbe/Pik3r4tm1.1Mpnd
Emx1tm1(cre)Krj/Emx1+
involves: 129S2/SvPas * C3H/HeH * C57BL/6 MGI:6331079


Genotype
MGI:6331072
hm1
Allelic
Composition
Pik3r4mbe/Pik3r4mbe
Genetic
Background
involves: C3H/HeH * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Pik3r4mbe mutation (0 available); any Pik3r4 mutation (62 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• mice exhibit a defect in working spatial memory when assessed using rewarded alternation in the T-maze
• however, mice exhibit normal anxiety-related behaviors in the elevated-plus maze and open field and no defects in motor coordination on the rotarod

cellular
• endosome to lysosome trafficking is compromised
• however, lysosomal function is not affected
• reduction in the initial pool of autophagosomes
• mice exhibit a mild defect in cortical neuronal migration, most noticeable at E16.5
• however, laminal structure of the cortex is intact

homeostasis/metabolism
• reduction in the initial pool of autophagosomes

nervous system
• mice exhibit a mild defect in cortical neuronal migration, most noticeable at E16.5
• however, laminal structure of the cortex is intact
• the pyramidal cell layer is fractured
• pyramidal cell layer shows a decrease in BrdU+ cells at E14.5
• pyramidal neurons are ectopically displaced in the stratum oriens layer of the hippocampus, most prominently in the CA1 subfield
• neurons that form the ectopic layer are born at E12.5, E14.5 and E16.5
• the stratum oriens layer contains ectopic pyramidal cells
• the stratum oriens exhibits a higher percentage of BrdU+ cells at E14.5
• however, the distribution of interneurons within the oriens layer and pyramidal cell layer is not altered
• a decrease in dendritic complexity in ectopic CA1 pyramidal cell neurons that is not seen in correctly positioned neurons
• however, no differences are seen in spine density of pyramidal neurons




Genotype
MGI:6331081
cn2
Allelic
Composition
Neurod6tm1(cre)Kan/Neurod6+
Pik3r4mbe/Pik3r4tm1.1Mpnd
Genetic
Background
involves: 129S1/Sv * 129S2/SvPas * 129X1/SvJ * C3H/HeH * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Neurod6tm1(cre)Kan mutation (0 available); any Neurod6 mutation (17 available)
Pik3r4mbe mutation (0 available); any Pik3r4 mutation (62 available)
Pik3r4tm1.1Mpnd mutation (1 available); any Pik3r4 mutation (62 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• pyramidal cell layer is fractured
• increase in the number of ectopic pyramidal cells in the stratum oriens layer
• the stratum oriens layer contains ectopic pyramidal cells




Genotype
MGI:6331079
cn3
Allelic
Composition
Pik3r4mbe/Pik3r4tm1.1Mpnd
Emx1tm1(cre)Krj/Emx1+
Genetic
Background
involves: 129S2/SvPas * C3H/HeH * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Emx1tm1(cre)Krj mutation (2 available); any Emx1 mutation (34 available)
Pik3r4mbe mutation (0 available); any Pik3r4 mutation (62 available)
Pik3r4tm1.1Mpnd mutation (1 available); any Pik3r4 mutation (62 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• pyramidal cell layer is fractured
• increase in the number of ectopic pyramidal cells in the stratum oriens layer
• the stratum oriens layer contains ectopic pyramidal 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
04/30/2024
MGI 6.23
The Jackson Laboratory