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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Amelxtm2Msnd
targeted mutation 2, Malcolm L Snead
MGI:3694787
Summary 2 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Amelxtm2Msnd/Amelxtm2Msnd involves: 129X1/SvJ MGI:3695923
ht2
Amelxtm2Msnd/Amelx+ involves: 129X1/SvJ MGI:3695924


Genotype
MGI:3695923
hm1
Allelic
Composition
Amelxtm2Msnd/Amelxtm2Msnd
Genetic
Background
involves: 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Amelxtm2Msnd mutation (1 available); any Amelx mutation (26 available)
phenotype observed in females
phenotype observed in males
N normal phenotype

Enamel architecture changes in Amelxtm1Msnd/Amelxtm1Msnd and Amelxtm2Msnd/Amelxtm2Msnd mice

craniofacial
• accelerated wear
• amelogenin nanospheres are larger than in wild-type mice
• enamel crystallites have irregular size and organization
• Tomes' processes are shorter and alpha 6 integrin expression is distributed at multiple foci in the secretory end piece
• Tomes' processes are shorter
• arrangement and size of rods are abnormal
• weaving of the matrix is reduced
• reduced thickness and more easily abraded
• molars show accelerated wear
• enamel is more prone to fracture and more easily abraded with mastication
• incisors are fragile with incisal edge fractures during chewing

skeleton
• accelerated wear
• amelogenin nanospheres are larger than in wild-type mice
• enamel crystallites have irregular size and organization
• Tomes' processes are shorter and alpha 6 integrin expression is distributed at multiple foci in the secretory end piece
• Tomes' processes are shorter
• arrangement and size of rods are abnormal
• weaving of the matrix is reduced
• reduced thickness and more easily abraded
• molars show accelerated wear
• enamel is more prone to fracture and more easily abraded with mastication
• incisors are fragile with incisal edge fractures during chewing

growth/size/body
• accelerated wear
• amelogenin nanospheres are larger than in wild-type mice
• enamel crystallites have irregular size and organization
• Tomes' processes are shorter and alpha 6 integrin expression is distributed at multiple foci in the secretory end piece
• Tomes' processes are shorter
• arrangement and size of rods are abnormal
• weaving of the matrix is reduced
• reduced thickness and more easily abraded
• molars show accelerated wear
• enamel is more prone to fracture and more easily abraded with mastication
• incisors are fragile with incisal edge fractures during chewing




Genotype
MGI:3695924
ht2
Allelic
Composition
Amelxtm2Msnd/Amelx+
Genetic
Background
involves: 129X1/SvJ
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Amelxtm2Msnd mutation (1 available); any Amelx mutation (26 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
craniofacial
• sections of abnormal rod pattern next to sections of normal rod pattern resulting from X inactivation of either the mutant or wild-type allele
• enamel fractures

growth/size/body
• sections of abnormal rod pattern next to sections of normal rod pattern resulting from X inactivation of either the mutant or wild-type allele
• enamel fractures

skeleton
• sections of abnormal rod pattern next to sections of normal rod pattern resulting from X inactivation of either the mutant or wild-type allele
• enamel fractures





Contributing Projects:
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
10/29/2024
MGI 6.24
The Jackson Laboratory