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Phenotypes Associated with This Genotype
Genotype
MGI:3775243
Allelic
Composition		 Smn1tm1Msd/Smn1tm1Msd
Tg(SMN1*A2G)2023Ahmb/0
Grm7Tg(SMN2)89Ahmb/Grm7Tg(SMN2)89Ahmb
Genetic
Background		 involves: 129P2/OlaHsd * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Grm7Tg(SMN2)89Ahmb mutation (34 available); any Grm7 mutation (125 available)
Smn1tm1Msd mutation (37 available); any Smn1 mutation (87 available)
Tg(SMN1*A2G)2023Ahmb mutation (3 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
nervous system
decreased motor neuron number ( J:131663 )
• mice exhibit motor neuron loss
abnormal lumbar dorsal root ganglion morphology ( J:131663 )
• at 1 year of age, mice have significantly reduced root counts compared to mice homozygous for Smn1tm1Msd, Tg(Prnp-SMN)92Ahmb, and Tg(SMN2)89Ahmb

Mouse Models of Human Disease
 DO ID OMIM ID(s) Ref(s)
Werdnig-Hoffmann disease DOID:13137 OMIM:253300
 J:131663

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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Send questions and comments to User Support. 		last database update
10/29/2024
MGI 6.24 		The Jackson Laboratory