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Phenotypes Associated with This Genotype
Genotype
MGI:2651648
Allelic
Composition
Smotm1Amc/Smotm2Amc
Tg(KRT14-cre)1Amc/0
Genetic
Background
involves: 129X1/SvJ * C57BL/6 * CBA
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Smotm1Amc mutation (1 available); any Smo mutation (40 available)
Smotm2Amc mutation (2 available); any Smo mutation (40 available)
Tg(KRT14-cre)1Amc mutation (2 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• pups die within 1 day after birth

craniofacial
• incisors are smaller in diameter and exhibit abnormal folding of the inner dental epithelium
• incisors show an absence of the papillary layer
• first and second molars of both the maxilla and mandible are abnormally fused, forming a single gigantic anlage
• dental cord is virtually absent
• the stellate reticulum is hypocellular and shows absence of early vascular loops in the coronal aspect
• the outer dental epithelium forms a continuous layer without the gaps seen in controls
• cusps of first molars are shallow, broad, underdeveloped and misshapen
• first and second molars of both the maxilla and mandible are abnormally fused, forming a single gigantic anlage
• exhibit abnonormally short ameloblasts in the most advanced cusps of first molar region that are overlaid by a scarce, squamous stratum intermedium
• in incisors, the cuboidal ameloblasts are only 15% of the apical-basal height and contain centrally located round nuclei
• mitochondria, RER, and Golgi are sparse and evenly distributed in the cytoplasm of incisor ameloblasts and Tomes' processes and the terminal webs do not develop
• amelolasts exhibit premature withdrawal from the cell cylce
• Tomes' processes do not develop
• the epithelial enamel organ appears disorganized at the late bell stage in the principal cusps of the first molars
• in molars, the stellate reticulum is hypocellular and shows absence of early vascular loops in the coronal aspect
• incisors exhibit abnormal folding of the inner dental epithelium
• in molars, the outer dental epithelium forms a continuous layer without the gaps observed in controls
• molars develop close to the oral surface, indicating virtual absence of a dental cord

growth/size/body
• incisors are smaller in diameter and exhibit abnormal folding of the inner dental epithelium
• incisors show an absence of the papillary layer
• first and second molars of both the maxilla and mandible are abnormally fused, forming a single gigantic anlage
• dental cord is virtually absent
• the stellate reticulum is hypocellular and shows absence of early vascular loops in the coronal aspect
• the outer dental epithelium forms a continuous layer without the gaps seen in controls
• cusps of first molars are shallow, broad, underdeveloped and misshapen
• first and second molars of both the maxilla and mandible are abnormally fused, forming a single gigantic anlage
• exhibit abnonormally short ameloblasts in the most advanced cusps of first molar region that are overlaid by a scarce, squamous stratum intermedium
• in incisors, the cuboidal ameloblasts are only 15% of the apical-basal height and contain centrally located round nuclei
• mitochondria, RER, and Golgi are sparse and evenly distributed in the cytoplasm of incisor ameloblasts and Tomes' processes and the terminal webs do not develop
• amelolasts exhibit premature withdrawal from the cell cylce
• Tomes' processes do not develop
• the epithelial enamel organ appears disorganized at the late bell stage in the principal cusps of the first molars
• in molars, the stellate reticulum is hypocellular and shows absence of early vascular loops in the coronal aspect
• incisors exhibit abnormal folding of the inner dental epithelium
• in molars, the outer dental epithelium forms a continuous layer without the gaps observed in controls
• molars develop close to the oral surface, indicating virtual absence of a dental cord

skeleton
• incisors are smaller in diameter and exhibit abnormal folding of the inner dental epithelium
• incisors show an absence of the papillary layer
• first and second molars of both the maxilla and mandible are abnormally fused, forming a single gigantic anlage
• dental cord is virtually absent
• the stellate reticulum is hypocellular and shows absence of early vascular loops in the coronal aspect
• the outer dental epithelium forms a continuous layer without the gaps seen in controls
• cusps of first molars are shallow, broad, underdeveloped and misshapen
• first and second molars of both the maxilla and mandible are abnormally fused, forming a single gigantic anlage
• exhibit abnonormally short ameloblasts in the most advanced cusps of first molar region that are overlaid by a scarce, squamous stratum intermedium
• in incisors, the cuboidal ameloblasts are only 15% of the apical-basal height and contain centrally located round nuclei
• mitochondria, RER, and Golgi are sparse and evenly distributed in the cytoplasm of incisor ameloblasts and Tomes' processes and the terminal webs do not develop
• amelolasts exhibit premature withdrawal from the cell cylce
• Tomes' processes do not develop
• the epithelial enamel organ appears disorganized at the late bell stage in the principal cusps of the first molars
• in molars, the stellate reticulum is hypocellular and shows absence of early vascular loops in the coronal aspect
• incisors exhibit abnormal folding of the inner dental epithelium
• in molars, the outer dental epithelium forms a continuous layer without the gaps observed in controls
• molars develop close to the oral surface, indicating virtual absence of a dental cord


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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
03/25/2025
MGI 6.24
The Jackson Laboratory